P. 1 4. 0 Method s
Tabl e 4-3
. Larva

l growt h estimate s fo

r entrainabl e fis

h larva e a t DCP P based o n literatur

e citations
. Growt

h estimate s ar

e used t o estimat

e larva l duration s i

n Tabl e 4-4
. Growt

h rate s ar e no t liste d fo r Cancer crab s becaus e o f

step-wis e growt

h increment s betwee

n larva l stages . Larva

l duration s fo

r crab s wer

e take n directl y fro

mlaborator

y studie s an

d ar e liste d i n Tabl e 4-4
. Famil y Species Cancrida e Cancer antennarius Cancer gracilis Clupeida e Sardinops sagax Engra u li d ida e Engraulis mordax Scorpaenida e Sebastes spp . KG B Sebastes spp . V/S. mystinus Larva l Growth Rat e (mm/d )

—

— 0.23 8

—~

~ 0.44 5 0.14 0 0.14 0 Referenc e

Roesijad i 197 6 All y 197 5 Mille r 195 2 Metho t an dKrame r

197 9 Lov e an dJohnso n 199 9 an d Yoklavic h pers . comm . Yoklavic h e t

al
. 199 6 an d Yoklavic h pers . comm . Hexagrammida e Oxyiebius pictus Cottida e Artedius lateralis Orthonopias triads Scorpaenichthys marmoratus Sciaenida e Genyonemus lineatus Stichaeida e Cebidichthys violaceus Clinida e Gibbonsia spp . Gobiida e Coryphopterus nicholsi Para l ichth y ida e Citharichthys spp . Paralichthys califomicus 0.08 3 0.08 3 0.08 3 0.30 0 0.20 0 0.24 8 0.24 8 0.27 3 0.20 0 0.28 0 Freema n etal
. 198 5

Freema n etal
. 198 5 Freema n etal
. 198 5 O'Connel l 1.953 ; Mose r

19 9 Murdoc h etal
. 198 9 Stepie n 198 6 Stepie n 198 6 Steel e 199 7 Kendal l 1992 ; Sakum a199 5 Alle n etal
. 199 0

TENER A E9-055. 0 4-3 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0P. 2 4. 0 Method s
Tabl e 4-4 . Mea

n an d maximu m larva l stag e duration s i n day s fro m hatchin g t o entrainmen

t estimate d fo r fis h larva e collected a

tDCPP . Maximu m duratio n i s base d on the centra

l 98 % o f the lengt h frequenc

y distributio

n an d growt h rate s fro m th e scientific literatur

e (Tabl e 4-3) . Cra

b megalopa l duratio n estimate d fro m Roesijad

i 197 6 an d Ally 1975 . Famil y Genus and

Species Cancrida e Cancer antennarius (megalops ) Cancer gracilis (megalops ) Clupeida e Sardinops sagax Engraulidida

e Engraulis mordax Scorpaenida

e Sebastes spp . KG

B Sebastes spp . V

/S. mystinus Hexagrammida

e Oxyiebius pictus Cottida e Artedius lateralis Orthonopias triads Scorpaenichthys marmoratus Sciaenida e Genyonemus lineatus Stichaeida e Cebidichthys violaceus Clinida e Gibbonsia spp . Gobiida e Coryphopterus nicholsi Para l ichth y ida e Citharichthys spp . Paralichthys califomicus Shortes tlarv a Mea n larv a entraine d (mm ) entraine d (m m

—

— 2. 4 ~ 2. 1 3. 3 2. 7 3. 2 2. 4 2. 6 3. 7 1. 1 5.7 4. 1 2. 0 1. 3 1. 6 5.5

6. 1 4. 2 3. 6 4. 1 3. 1 3. 6 4. 8 2. 4 2. 6 6. 4 2. 6 2. 6 3.3 Longes

tlarv a Estimate

d ) entraine d (mm ) larva l duration s Mean-Ma x (d )

—

— 19. 1 24. 9 5. 6 4. 5 5. 2 5.3 . 6. 1 6. 1 5.5 12. 0 12. 0 3. 4 3. 5 7. 8 42. 7

41. 6 13.3-70. 6 9.0-51. 2 6.2-16. 4 6.4-12. 9 10.4^-24. 1 8.9-34. 9 11.4-42. 2 3.6-8. 0 6.7-22. 0 • 6.6-25. 4 9.0-31. 6 2.2-5. 2 6.7-11. 0 6.0-22. 1

TENERA E9-055. 0 4-4 0 Fina l 316(b ) Demonstratio n Marc h 1,200 0P. 3 4. 0 Method s Tabl e 4-5
. Stud

y gri dsurve

y star t date s an dth e perio do f

day s use di n calculation s fo

r eac h survey , fo

r tw o samplin g periods : June 199 7 through Jul y 1998 , an dJun e 199 8 through July 1999
. The star t dat e ofth e entrainmen

t survey s tha

t paire dwit h th e gridsurvey s generall y starte d2 4 hour s afte

r th e beginnin g o f

eac h 72-hou r gri dsurvey .

Analysi s Survey s Surve

yStar t Dat e Perio d 3 Ju l 21 , 199 7 Au g 25 , 199 7 Se p 29 , 199 7 Oc t 20 , 199 7 No v 17 , 199 7 De c 10 , 199 7 Ja n 22 , 199 8 Fe b 26 , 199 8 Ma r 18 , 199 8 Ap r 15 , 199 8 Ma y18 , 199 8 Ju n 8 , 199 8 Analysi s Perio

d 4 Survey s Ju

l 21 , 199 8 Au g 26 , 199 8 Se p 16 , 199 8 Oc t 6 , 199 8 No v 11 , 199 8 De c 9 , 199 8 Ja n 12 , 199 9 Fe b 3 , 199 9 Ma r 17 , 199 9 Ap r 14 , 199 9 Ma y24 , 199 9 Ju n 23 , 199 9 Perio d Star t

Ju l 4 , 199 7 Au g 8 , 199 7 Se p 12,199 7 Oc t 10 , 199 7 No v 3 , 199 7 No v 29 , 199 7 Ja n 1 , 199 8 Fe b 9 , 199 8 Ma r 8,199 8 Ap r 1 , 199 8 Ma y2 , 199 8 Ma y29 , 199 8 Ju l 3 , 199 8 Au g 8 , 199 8 Se p 6 , 199 8 Se p 26 , 199 8 Oc t 24 , 199 8 No v 25 , 199 8 De c 26 , 199 8 Ja n 23 , 199 9 Fe b 24 , 199 9 Ma r 31 , 199 9 Ma y4 , 199 9 Ju n 8 , 199 9 Perio

d En d

Au g 7 , 199 7 Se p 1 1 Oc t 9 No v 2 No v 2 8 De c 3 1 Fe b 8 Ma r 7 Ma r 3 1 Ma y1 Ma y2 8 Ju l 3 Au g 7 Se p 5 Se p 2 5 Oc t 2 3 No v 2 4 De c 2 5 Ja n 2 2 Fe b 2 3 Ma r 3 0 Ma y3 Ju n 7 Ju l 2 199 7 199 7 199 7 199 7 199 7 199 8 199 8 199 8 199 8 199 8 199 8 199 8 199 8 199 8 199 8 199 8 199 8 199 9 199 9 199 9 199 9 199 9 199 9 Day s

3 5 3 5 2 8 2 4 2 6 3 3 3 9 2 7 2 4 3 1 2 7 3 6 3 6 2 9 2 0 2 8 3 2 3 1 2 8 3 2 3 5 3 4 3 5 2 5

TENER A E9-055. 0 4-4 1 Fina l 316(b ) Demonstratio n Marc h 1,200 0PACIFI C OCEA N

Entrainmen t Samplin g Location s P. 4 4. 0 Method s

Diabl o Cov e

Intak e 4 ^ Structure
\ Intak e • \ Cov e

Boa t Doc k DCP P

LEGEN D Clif f To p Intertida l Zon e 0 25 0 50 0 

# V

Figur e 4-1 . Diagram o f DCPP Powe r Plant , Intake Cov e an d EntrainmentSamplin g Locations .

TENER A E9-055. 0 4-4 2 Fina l 316(b ) Demonstratio n Marc h 1.200 0P. 5 4. 0 Method s

Travelin g Vvate r Scree n

Circulatin g Wate r Pum p Moto r

i

Bong o Plankto n -Ufit S Valv e Ope n M^F/ir"

pum p Impelle r Figure 4-2 . Cross-sectio n vie w ofth e DCP P intak e structur e illustratin g th e location ofth e entrainmen

t samplin g sites
.

TENER A E9-055. 0 4-4 3 Fina l 316(b ) Demonstratio n Marc h 1,200 04. 0 Method s P. 6

Morr o Roc k 124 ° w 120' W 116 c w

DIABLO CANYO N POWERPLAN T an d araa o

f detai l

; Montan a tat e Parl e

Diabl o Canyo n Power . Plan t y ________________________ !
JurrertMefil p

- Wes t Breakwate r -4T N

-38° N

84° N

Onshor e Curren t 1 0
. 1km Column s = A - H Dept h Contour s - * V 6 0 meter s

-~ —4 0 meter s - ^ - 2 0 meter s

Avil a Beac h

Poin t Sa n Lui s A 121 ° Tru e Nort h Alongshor e Curren t Figur e 4-3
. DCP P 316(b ) stud y gri d an d dept h contours
.

TENER A E9-055. 0 4-4 4 Fina l 316(b ) Demonstratio n Marc h 1
. 200 0P. 7 4. 0 Method s

DCP P Intak e Cov e Figure 4-4 . A

n exampl e o f

th e "ping-pong " samplin g trac k employedi

n gri dcei l sampling ; th e startin g cell (Fl ) an dth e initia

l southwar

ddirectio n ofth e transec t wer e randomly selected
. All 6

4 cell s ar e sampleddurin g th e 72-hou r survey period , weathe

r permitting
. DCPP' s Intak

e Cove i s locatedeas t

o f th e junctur e betwee

n cell s E l an

dDl
.

TENER A E9-055. 0 4 ^ 5 Fina l 316(b ) Demonstratio n Marc h 1,200 0P. 8 4. 0 Method s

Field' s Cov e

PACIFI C OCEA N



## Intak e Cove Surfac e Plankto n To

w DCP P

Intak e Structure

%

10 0 m /

Figure 4-5 . Diagra

mo f DCP P Intak e Cov e surfac e plankto n to w samplin g location
.

TENER A E9-055. 0 4-4 6 Fina l 316(b ) Demonstratio n Marc h 1.200 0m

z m 

## £ m <P o O l 0 1 O

hu

3 u . W ca Q ) TO 

# M N J 3 o =- . o o O 3 ENTRAINMEN T
La b processing

for FISH

Lab processing

for MEGALOPS

Lab processing

for ZOEA
GRI D Lab processing

for FISH
Lab processing for

MEGALOPS
Lab processing

for ZOEA -onl y partia l surve

y worku p INTAKE COV E Lab processing

for FISH 199

6 OTNI D 199 7 J | F | M | A | M | J | J | A | S | 0 | N | D 199 8 J | F | M | A | M | J | J | A | S | 0 | N | D 199 9 J | F | M | A | M | J

. , " ,'!'» » 'iA , ^js^Waaiu^Si^iiiiH^aainbtecoltoctlon a n _.,.*_,,", - «-2« « , *•*,, ,.,• > -', ?••*••' • » .-.,' - _weeW

y sanples pcocesse^taj ^ Analysi s Perio d J1 ) j Analysi s Peno d ii. Analysi s Perio d (3 ) | onl y processe

d survey s paire d w/gri d

• -

-. • *$:, , .^.*.> - : weekiysarnple s prttoiws ^ „ , , £-,..- * Analysi s Penod (1 ) | Analysi s Perio d (2 ) Analysi s Perio d (3 ) |

* * l-iiTr - .\«;..«^FAviiwe*y.sampies p

Analysi s Kenoo(i ) j " • •

| Analysi s Perio d (3 ) | ;_ D ••'Al Ml' .' r ^Otfb?itMyfl^ ^ X-l K >?*£v -."?* » ,-,._<**,''monthl y sample s "prbeesse

a Ibr.lwva l fishes,-'.«--., ,i*» ; * „ < „ - , , Analysi s Peno d (3 ) \ Analysi s Peno d (4 ) v;_w^*Sv^&i&*a^ ^ r, f;'- 'A " 7 ,. V Analysi s Perio d (3 ) | Analysi s Peno d (4 )



### .mmm '
. - •

. - , '<,•

k, .. •<.&>»-.

. • s.,WaMt|^JittailUi;Cd^:iMatfikti_SA\taMcttHtfeaens.i-»nvj> V •**•-f 1 - - -.. r "••:_.,,^-?.r> « ^

: • Iprocesse d for larva l fishe

s | |ptocesse d forlarval fishes) | J

* zoe a no t remove d fro m thes e samples
. " zoe a densit

y substitute d fo rOctobe ran d Novembe r199 6 Anajysi s Perio d (1) : Octobe r23,199 6 - Septembe r30,199 7 Anaiysi s Perio d (2) : Octobe r1 , 199 7 - Septembe r30,199 8 Analysi s Perio d (3) : Jul y 1 , 1997 - Jun e 30.199 8 Analysi s Perio d (4) : Jul y 1,199 8 - Jun e 30,199 9

Figur e 4-6 . Summar

y o f entrainment , stud y grid , and Intake Cov e surfac e plankto n to w sampl e collection , laborator y processing , an

d analysi s periods .(a ) P.1 0 4. 0 Method s



# 7K Onsho n Movemen t N P 

# ± K (b )

< • >

Figur e 4-7
. Tw o approache s fo r calculatin g P s basedupo

n water current measurements : (a ) For specie s disperse dthroughou t th e samplin g gri d(small rectangle) , bot h alongshor

e an donshor e component s ar

e usedt o calculate P s ~-=&, wher e N c i s th e larva

l populatio n estimate ofth e N P offshor e gri dan dN p i s th e estimate o f

larva l abundanc e ofth e populatio n o f inference ; (b ) Fo

r
^ L nearshore species , only th e alongshore componen t i s usedt o calculate P s = — , wher e L c i s th e lengt h ofth e offshor

e gri dan dL

p i s th e estimate dalongshor e movemen

t throug h th e offshor

e grid
.

TENERA E9-055. 0 4-4 8 Fina l 316(b) Demonstratio n Marc h 1.200 0P.1 1
4. 0 Method s

a ) Yea r 1 - Apri l 1,199 7 throug h Jul y 1,199 8

50 0 40 0

C O C Q o C J Q . 3 C D C U E o 2 30 0

20 0 10 0

t o -10 0 o u c

_ 5 o Q -20 0 -30 0 ^40 0 -50 0 -60 0 -70 0 -80 0 2/9 8

-10 0 0 10 0 20 0 30 0 Offshore Onshor

e Kilometer s b ) Yea r 2 -Apri l 1,199 8 throug h Jul y 1,199 9

- .KilometersUpcoastoastDownc 500 - 400 : 30 0 iCM 100 i O f -100 i -20 0 j -300- i JU/ 9 15/ 9

.719 ) .6/ 9 3/Q 11/ 9 67 9 ^Kf l f 1/ 9 » 1 2/ 9 1 „ 13/ 9 4/ 9 f

-400 - -500 - -600 - -70 0
nnn . 5/

9 /

6/ 9 i 7/ 9 V » -10 0 0 10 0 20 0 30 0 Offshor e Onshor

e Kilometer s Figur e 4-8
. Cumulativ e upcoast/downcoas t an donshore/offshor

e movemen

t o f wate r a t th e Diabl o Canyon current

mete r statio n (curren

t mete r statio n i s locate da

t th e cross-hairs)
.

TENER A E9-055. 0 4-4 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.1 2



# Blan k Pag eP.1 3

(S I © r eP. M 5. 0 Result s 

## 5. 0 RESULT S
Thi s sectio n i s divide dint

o agenera l overview ofth e datacollecte ddurin g th e entrainmen t an d impingemen

t studie s a t DCPP , result s o f

variou s modelin g analyse s o n selecte dtarge t

taxa , an da summar y ofth e tax aassessments . 

# 5. 1 Overview Th e followin g i s agenera

l overview ofth e datacollecte dan danalyze dfo

r th e DCP P Sectio n 316(b ) Demonstration
. Densit y estimate s o f

targe t organism s wer

e determine dfro

mplankto n collection s a

t th e intak e structure , i

n th e Intak e Cove , jin d i

n th e stud y grid
. The section s tha

t follo w present

an ddiscus s th e result s o f

analyse s o f

individua l targe t tax achose

n b y th e ETWG
. 

## 5.1.1 Entrainment Entrainmen

t i s defineda s th e captur

e an dinclusio n o f

organism s i

n th e coolin g wate

r o f powe r plant s (Schubel an

dMarcy 1978)
. Organism s becom e entraine di

n th e coolin g wate

r syste ma t DCP P onc e the y pas s throug h th e travelin g screen s an dcanno t escape . Larva

l stage s offis h an

d invertebrate s ar

e usually wea

k swimmer s an

dgenerally ente

r th e flo w passively
. 

### 5.1.1. 1 Weekl y Abundanc e Estimate s o f Entrainmen t Ther e wer e 8,80 4 subsample s collecte da

t th e entrainmen

t sampling location fro

mOctobe r 23 , 199 6 throug h Jun e 1999
. I

n accordanc e wit

h th e ETW

G agreement , larva

l fishes , Cancer

cra b larvae , an dse aurchin larva

e wer e identifiedan

denumerate dfro

maportion o f

thes e subsamples
. Cance r cra b megalop s wer

e processedfro

m5,52 4 subsamples , larva

l fis h fro m4,69 3 subsamples , an

dCancer cra b zoe aan dstrongylocentroti dse aurchin s fro m63 6 subsample s durin g laborator

y processing
. The datafo

r se aurchin s wer

e collecte dfo

r informationa

l purpose s onl y an dwer e no t use di n assessin g entrainmen

t effects pe r agreemen t wit h th e ETWG
.

TENERA E9-055. 0 5- 1 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.1 5 5. 0 Result s Cance rspp. crabs Zoeal stage s o f Cancer antennarius, C. anthonyi, C. gracilis, C. productus, an dtw o Cancer

spp . identification s lef

t a t th e generi c level wer

e foun di n th e entrainment

subsamples
. On e unidentifie dCancer

specie s (sp
. A ) wa s confirmedlate i n th e stud y t o b e Cancer

jordani (P
. Reilly , CDF&G , Monterey , CA)
. Ther e wer e 96,29 5 zoeae identifie dan denumerate dfro

mth e 63 6 entrainment

subsample s processed
. The mea n densit y o f each stag e b

y specie s i s presente di

n Appendix H . I

n general , zoea

l stag e 1 individual s wer

e mos t abundant , an

dzoea l stag e 5 individual s wer

e leas t abundant
. Th e megalopa

l stag e o f Cancer spp . crab s wa s als o identifie dan denumerate dfro

mentrainment subsamples
. Megalop s o f

Cancer antennarius, C. anthonyi, C. gracilis, C. magister, C. productus, anda

t leas t tw o generi c identification s o f Cancer spp . andC. jordani wer

e recorded
. I n th e 5,52 4 entrainment

subsample s processe dfo

r megalops , 4,88 7 individual s wer e identifie d an denumerated
. Cancer

antennarius an

dC
. gracilis megalop s wer e mor e abundan t tha n other Cancer specie s megalop s (Appendix H) . Th e specie s chosen by th e ETW G fo r analysi s wer

e Cancer antennarius an

dC
. gracilis (Tenera 1997b)
. Additiona

l informatio n o

n th e demograph

y an dresult s ofth e thre e assessment model s fo

r thes e tw o specie s i s presente di n Sectio n 5.2.1 . Fishes Ther e wer e 98,59 3 larva

l fishe s identifie dan

denumerate dfro

m4,69 3 entrainment

subsample s (Appendix H)
. O f

these , -98 % wer

e place dint

o 17 8 differen

t taxonomi c categorie s rangin g fro m ordina l to specifi c classification s (Tabl e 5.1-1 ) whil e th e remainin g ~2 % wer e place dint

o on e o f thre e categories : unidentifie dlarva l fis h (0.4%) , unidentifie ddamagedlarva l fish (0.2%) , or unidentifie dlarva

l fish fragmen

t (1%)
. Adult s o f

thes e tax aliv e i

n avariet y o f habitats , fro

m intertida l an dshallo w subtida

l t o deep-wate

r an dpelagi c habitats
. The tax ai n highes t abundanc e wer e thos e whos e adult s wer

e generall y foun

dclos e t o shore , i

n shallo w water . One exceptio n wa s th e thirteent

h mos t abundan t taxon , th e norther

n lampfish (Stenobranchius leucopsarus), whos e adult s ar

e foun dt o depth s o f

3,00 0 m(Miller

an dLe a1972)
. TENER A E9-055. 0 5- 2 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.1 6 5. 0 Results
The ETW G chos e 14 larva

l fish tax a(Tabl e 4-1 ) fo

r detaile dassessmen

t usin g the FH, AEL, an

d ETM approaches
. Result s o f

thes e analyse s ar

e presentedseparately i

n subsequen

t sections
. Sea Urchins Th e ETW G agreedtha

t only metamorphosin g an

drecently metamorphose djuvenil e se aurchin s wouldb e removed , identified , an denumerate dfro

mthe entrainmen

t subsamples , bu

t tha t n o assessment

o f entrainmen

t effect s wouldb e made
. Du e to th e small siz e ofth e echinopluteu s larvae , it wa s assumedtha

t many woul db e extrude dthrough th e ne t mesh used , resultin g i

n a n underestimat

e o f thei r abundance
. A tota l o f 5,96 6 se aurchin larvae wa s foun di n th e 63 6 subsample s processed
. The weekly mea n densit y o f Strongylocentrotus

fransiconus an

dS. purpuratus individual s collecte da t th e intak e durin g th e perio dOctobe

r 199 6 throug h Jun e 199 8 i s presente di n Figur e 5.1-1 . Th e densit

y o f S. purpuratus wa s greate

r tha n S. fransicanus durin g mos t

survey s wher

e individual s o f

bot h specie s wer

e present . Bot

h specie s wer

e mos t abundan t durin g th e sprin g an

dsummer , wit

h highes t densitie s o f

S. fransicanus present

i n Marc h 199 7 an dS. purpuratus pea

k densitie s observe ddurin g Jun e 1997
. A greater densit y o f bot h specie s occurre ddurin g 1997 tha n i n 1998
. Generally , only afe

w individual s wer

e collecte ddurin g th e fal

l o r winter
. A summar

y ofth e data fo r all entrainmen

t survey s i s presente di

n Appendi

x H . 5.1.1. 2 Monthl y Abundanc e Estimate s i n th e Stud y Gri d A tota l o f 6,14 1 subsample s wa s collecte ddurin g th e monthl y stud y gri dsurvey s conducte dfro m Jul y 199 7 through June 1999
. A s agreedwit h the ETWG , larva

l fish wer e identifiedan

d enumerate dfro

m3,06 1 subsamples , megalop s wer e identifiedan

denumerate dfro

m3,06 6 subsamples , an

dzoe aan durchin s wer

e identifiedan

denumerate dfro

m12 8 subsample s durin g laborator y processin g (Appendi x G)
.

TENER A E9-055. 0 5- 3 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.1 7 5. 0 Result s Cance rspp. crabs Th e five Cancer

cra b zoea l stage s wer

e remove dfro

mth e hal f o f th e subsample s preserve di n formalin an

dcollecte ddurin g th e March an dApri l 199 8 gri dsurveys . The ETW G decide dnot

to require tha

t zoe ab e remove dfro

mth e remainder

ofth e gri dsubsample s collecte ddurin g thi s study
. Zoea l stage s o f Cancer antennarius, C. gracilis, C. anthonyi, C. productus, C. jordani, an da t leas t one unidentifie dCancer

spp . wer e foun di n th e subsample s fro

mth e tw o stud

y gri dsurvey s tha t wer e processed
. A tota

l o f 27,27 0 zoe awa s remove dan didentifie dfro

mth e 12 8 gri d sample s processed
. Th e mea n densit y o f each stag e b

y specie s i s presente di

n Appendix H . Generally , recentl y hatche dstag e 1 zoe awer e th e mos t abundan t an dolder stag e 5 zoe awer

e leas t abundant
. Th e megalop s stag e o f

Cancer antennarius, C. gracilis, C. anthonyi, C. productus, C
. magister, C. jordani, an

da t leas t one unidentifie dCancer

spp . wer e foun di n th e stud y gri dsamples
. I

n th e 3,06 6 gri dsample s processe dfo r megalops , 6,59 9 individual s wer e remove dan

didentified
. The mea n densit y o f megalop s by specie s fo

r eac h surve y i s presente di

n Appendix H . Cancer antennarius an

dC. gracilis megalop s wer e mor e abundan t tha n th e megalop s o f

other Cancer species
. Th e ETM

assessment

o f tiies e tw o specie s only use s megalop s dat abecaus e zoe awer e no t processe dfro

mal l ofth e paire dstud

y gri dsurvey s per

agreement

by th e ETWG
. Fishes There wer e 43,78 5 larva

l fishes identifie dan

denumerate dfro

mth e 3,16 3 stud

y gri dsubsample s tha t comprise d17 5 differen

t tax arangin g fro

mordina l to specifi c level s o f

classification
. Adult s o f thes e tax aliv e i

n avariet y o f habitats , fro

mintertida

l an dshallo w subtida

l t o deep-water

an d pelagi c habitats
. Th e tax ai n highes t abundanc e i

n th e gri dsubsample s wer

e thos e whos e adult s wer e typicall y pelagi c o

r subtidal ; mor

e intertidali y or

nearshor e distribute dspecie s wer

e foun d i n lowe r abundanc e i

n th e stud y grid
.

TENERA E9-055. 0 5- 4 Fina l 316(b ) Demonstratio n Marc h 1,200 0.1 8 5. 0 Results Sea Urchins Seaurchin s wer

e identifiedfro

mth e hal f o f th e subsample s preserve di n formali n durin g only the Marc h an dApril 199 8 stud

y gridsurveys . The ETW

G decidednot

to requir e tha t se aurchin s b e sorte dfro mthe remainde

r ofth e stud

y gri dsubsample s an

dagreedtha

t th e datawouldno

t b e assesse dusin g amathematica l modelin g approach (Tenera1997b)
. Ther e wer e 76 4 Strongylocentrotus spp . foun di n th e 12 8 subsample s processed
. The mea n densit y o f S. purpuratus i

n Marc h an dApril o f 199 8 appeare dto b e greate r tha n S.fransicanus durin g thos e month s (Appendi

x H) . 5.1.1. 3 Weekl y Intak e Cov e Surfac e Tow s Ther e wer e 27,06 2 larva

l fishe s identifiedan

denumerate dfro

m66 0 Intak

e Cov e surfac e plankto n to w sample s collecte dbetwee n 199 0 an d1998
. Th e ETW

G agreedtha

t only th e sample s fro mth e 7 m o perio do f

Decembe r through Jun e o f

eac h yea r wouldb e processe dan

danalyze d fo r eac h yea r becaus e thes e month s ar

e generally th e perio do f

pea k larva l abundanc e fo

r mos t species
. Th e tax apresen

t i n thes e sample s wer

e simila r to thos e foun

di n th e entrainment

an d stud y gri dsample s (Appendi

x H) . A s mentione dpreviously , thes e datawer e use dto generat

e a nine-yea r averag e o f

larva l abundance
. Thi s inde

x calculate dfro

mthi s long-ter

maverag e wa s then usedt o scal e th e estimate s o f annua l entrainmen

t fo r eac h taxon . 

### 5.1.2 Impingement
Ther e wer e 6 6 tax arepresentin g 2 9 familie s o f bon y fishes, sharks , rays , an

deel s identifiedfro

m impinge dmateria

l collecte ddurin g the 1985-8 6 DCP P stud y (Tabl e 5.1-1)
. Som

e taxa , suc h a s thombac k rays , wer e collecte di

n highe r number s an

dbiomas s a

t Uni t 2 despit e mor e frequen t samplin g a

t Unit 1
. Th e densitie s o f

impingedfishes fo

r Unit s 1 an

d2 wer e compareddurin g a1 0 dperio dwhe

n pum p an dtravelin g scree

n operation s betwee

n unit s wer

e simila r (PG& E 1988)
. The densitie s o f

impingedskate s an

dray s wer e greate r o n the Uni t 2 screen s tha

n a t Uni t 1 (PG&E 1988)
. Impingemen t rate s fo r bot h unit s wer

e simila r fo r rockfishe s an

dtota l bon y fishes (PG&E 1988)
. TENER A E9-055. 0 5- 5 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.1 9 5. 0 Result s
Th e CW P di dno t operate continuall y durin g th e impingemen t samplin g (Figur e 5.1-2)
. Equipmen t repair s o n Unit 1 resulte di

n period s whe

n pump s o r travelin g screen s wer

e no t i n ful l operation
. Unit

2 wa s i n th e final stage s o f

constructio n an

dtestin g durin g th e DCP

P Sectio n 316(b ) impingemen

t study , which als o limite dth e numbe r o f day s whe n th e pump s wer

e operationa l an dtravelin g screen s wer

e sampled
. Although impingemen t samplin g wa s schedule d t o occur o n th e same da

y eac h week , i t wa s adjustedsevera

l time s du e t o operation s a t th e intake
. A tota l o f 5 1 dwa s sample dfo

r Unit 1 , an d2 4 dwer e sample dfo

r Unit 2
. Unit 2 bega n operatin g o n amore regula

r basi s by October

1985
. There wer

e eight day s o f samplin g when bot

h Unit s 1 an d2 wer e full y operationa

l fo r 2 4 h r (Figure 5.1-2) . Man y fishe s liv e withi n th e intak e forebay s without

becomin g impinged
. Dive r observation s an

d underwate r vide o ofth e DCP

P travelin g screen s durin g pre-operatio n (Behren s an dLarsso n 1979 ) an doperatio n (PG&E 1988 ) hav e recorde dbot h larg e an dsmall fishe s freel

y swimmin g throughou t

th e forebay s i

n fron t ofth e travelin g screens . Durin g th e impingemen t study , diver s i

n th e Intak e Cov e o n Augus t 21 , 1985 , observe dove

r 10 0 juvenil e yellowtail/oliv e rockfishe s i n fron t ofth e Uni t

1 ba r rack s (PG&E 1988) , yet

only on e rockfis h wa s collecte ddurin g th e tw o Augus t impingement

surveys . Th e number

o f fishes, thei r

combine dweight , an

dth e amoun

t o f debri s collecte ddurin g eac h o f th e 24-hour

survey s wer

e compare dfo

r sample s collecte da

t Unit s 1 an

d2 (Figur e 5.1-3)
. Ther

e doe s not appea r t o b e arelationship betwee n th e numbe

r or weigh t o f fishes an dth e amount

o f debri s collecte db

y Uni t 1
. The larges t

numbe r o f fishe s wa s collecte dfro

mUnit 1 durin g lat

e Jun e 198 5 when th e amount o f debri s collecte dwa s low
. Th e tota l weigh t o f fishe s wa s low becaus e mos t

ofth e individual s wer

e young-of-the-yea

r rockfishe s ca . 60-8 0 m

mi n length
. A

t Unit 2 , th e greates t

numbe r an dweigh t o f fishes impinge ddidnot

consistentl y occur

whe n th e amount o f debri s wa s heaviest
. Th e larges t amount o f debri s wa s collecte ddurin g late Decembe r 1985
. Durin g tha

t period , th e weigh

t ofth e fishes i

n th e collectio n wa s high , bu t th e numbe

r o f individual s wa s low
.

TENERA E9-055. 0 5- 6 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.2 0 5. 0 Result s
A tota l o f 1,31 4 Cancer

antennarius wa s collecte di n impingemen

t sample s fro

mFebruar y 198 5 through Marc

h 1986
. Ninety-seven percen t ofth e crab s wer

e juveniles , having a

n averag e weigh

t o f abou t 3 g . Tabl e 5.1- 2 present s th e standardize dbiomas s (g/millio n m ^ of wate r entrained ) o f Cancer cra b specie s impinge da

t DCPP
. Amon

g th e variou s specie s of

Cancer crabs , C
. antennarius wer

e impinge da

t th e highes t

rate . Th e overall impingemen

t rate of Cancer crab s wa s simila r fo r bot h powe r plan t units
. A repor t reviewin g th e 1985-8 6 DCP P impingemen

t stud y wa s prepare dan

dsubmitte dt o th e ETW G (Tenera1988)
. The ETW G detennine dtha

t additiona l impingemen

t studie s wer

e no t require da t DCP P base don thi s repor

t tha t showedtha

t th e plant ha dgenerally lo w rate s o f impingement
.

TENER A E9-055. 0 5- 7 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.2 1 5. 0 Result s Tabl e 5.1-1 . Phylogeneti c lis t o f fishes collecte ddurin g th e Diabl o Canyon Powe r Plant 316(b ) stud

y followin g primaril y th e AF S lis t o f Commo n an

dScientifi c Fis h Name s (Robin s et

al
. 1991 ) andsecondaril y th e classificatio n adopte dby Mose r (1996)
. Orde r Suborde r Famil y Genu s & Specie s Clupeiforme s

Clupeida e Engraulidida e
Salmoniforme s Argentinoide i Argentinida e Bathylagida e

Microstomatida e Salmonoide i Osmerida e Stomiiforme s

Gonostomatida e Stemoptychida e Phosichthyida e
Chauliodontida e Stomiida e Aulopiforme s Alepisaurioide i Synodontida e Paralepididae herring s

Etrumeus teres (DeKa y 1842 ) Sardinops sagax (Jenyn s 1842 ) anchovie s Anchoa compressa (Girar d 1858 ) Engraulis mordax Girar

d 185 4 Argentin e Argentina sialis Gilber

t189 0 blacksmel tan d smoothtongue s Bathylagus ochotensis Schmid t193 8 Bathylagus pacificus Gilber t189 0 Leuroglossus spp . Leuroglossus stilbius Gilber t189 0 pencilfishe s Microstoma spp . smelt s lightfishe s Cyclothone spp . Cyclothone signata Garma n 189 9 hatchetfishe s Sternoptyx spp . highsea s lightfishe s Vinciguerria lucetia (Garma n 1899 ) Vinciguerria poweriae (Cocco 1838 ) dragonfishe s Chauliodus macouni Bean 189 0 scal y dragonfishe s Stomias atriventerGarma n 189 9
lizardfishe s Synodus lucioceps (Ayre s 1855 ) barracudina

s Lestidiops ringens (Jorda n & Gilber

t1880 ) Commo n Nam e

roun d herrin g Pacifi c sardin e deepbbd y anchov y norther n anchov y

Pacifi c argentin e popey e blacksmel t Pacifi c blacksmel t smoot h tongue s Califomi a smoothtongu e dusky pencilsmel t

bristlemouth s show y bristlemout

h hatchetfis h Pacifi c lightfis h highsea s lightfis h Pacifi c viperfis h blackbell y dragonfis h

Califomi a lizardfis h slende r barracudin

a (continued )
TENERA E9-055. 0 5- 8 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.2 2 5. 0 Result s Tabl e 5.1-1 . (cont'd )
Orde r Suborde r Famil y Myctophiforme s

Myctophida e

Gadiforme s Gadida e

Merlucciida e Ophidiiforme s

Ophidiida e Bythitida e
Batrachoidiforme s

Batrachoidida e Gobiesociforme s

Gobiesocida e

Atheriniforme s

Atherinida e Genu s & Specie s

lanternfishe s Ceratoscopelus townsendi (Eigenman n & Eigenman n 1889 ) Diaphus theta Eigenman n & Eigenman n 189 0 Diogenichihys atlanticus (Tanin g 1928 ) Hygophum atratum (Garma n 1899 ) Nahnobrachium regalis (Gilber t 1892 ) Nannobrachium ritteri (Gilber t 1915 ) Nannobrachium spp . Protomyctophum crockeri (Boli n 1939 ) Stenobrachius leucopsarus (Eigenman n & Eigenman n 1890 ) Symbolophorus californiensis (Eigenman n & Eigenman n 1889 ) Tarletonbeania crenularis (Jorda n & Gilber t

1880 ) Triphoturus mexicanus (Gilbert1890 ) cod s Microgadus proximus (Girar d1854 ) hak e Merluccius spp . Merluccius productus (Ayre s 1855 ) cusk-eel s Chilara taylori (Girar

d 1858 ) Ophidion scrippsae (Hubb s 1916 ) brotula s Brosmophycis marginata (Ayre s 1854 ) Cataetyx rubirostris Gilber t

189 0 toadfishe s Porichthys notatus Girar d185 4 clingfishe s Gobiesox spp . Gobiesox maeandricus (Girar d1858 ) Rimicola spp . silverside s Atherinops affinis (Ayre s 1860 ) Atherinopsis californiensis Girar d185 4 Leuresthes tenuis (Ayre s 1860 ) Scomberesocida e saurie s

Cololabis saira (Brevoor t 1856 ) Commo n Nam e

dogtoot h lampfis h Californi aheadligh t

fish longfi n lantemfis h thickhea dlantemfis h pinpoin t lampfis h broadfi n lampfis h lanternfishe s Califomi aflashlightfis h norther n lampfis h Californi alantemfis h blu e lantemfis h Mexica n lampfis h
Pacifi c tomco d hak e Pacifi c hak e
spotte dcusk-ee l basketweav e cusk-ee l
re dbrotul a rubynos e brotul a plainfi n midshipma n clingfis h norther n clingfis h kel p clingfis h topsmel t jacksmel t Californi agrunio n Pacifi c saury (continued )

TENER A E9-055. 0 5- 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.2 3 5. 0 Result s Tabl e 5.1-1 . (cont'd )
Orde r Suborde r Famil y Genu s & Specie s Commo n Nam e Lampridiforme s Trachipteroidei Trachipteridae Beryciforme s Stephanoberycoide i Melamphaidae

Gasterosteiforme s Gasterosteoide i Gasterosteida e Syngnathoide i Syngnathida e
Scorpaeniforme s Scorpaenoide i Scorpaenida e ribbonfishe s

Trachipterus altivelis Kner 185 8 bigscale s Melamphaes spp . Melamphaes parvus Ebelin g 196 2 Poromitra crassiceps (Gilnthe r 1878 )
stickleback s A ulorhynchus flavidus Gil l 186 1 pipefishe s Syngnathus spp . Syngnathus californiensis Store r 184 5 Syngnathus leptorhynchus Girar d 185 4 scorpio n fishes, rockfishes, an d thomyhead s Sebastes aurora (Gilbert1890 ) Sebastes diploproa (Gilbert1890 ) Sebastes jordani (Gilbert1896 ) Sebastes levis (Eigenman n & Eigenman n 1889 ) Sebastes mystinus (Jorda n & Gilber

t1881 ) Sebastes paucispinis Ayre s 185 4 Sebastes saxicola (Gilbert1890 ) Sebastes spp . Sebastes spp . 1 /

V_De P Sebastes spp . D Sebastes spp . V Sebastes spp . V
_ Sebastes spp . V D Sebastes spp . V_D
_ Sebastes spp . VD e Sebastes spp . V D Sebastes spp . V P Sebastes VD p Sebastolobus spp . king-of-the-salmo n
bigscale s linl e bigscal e creste d bigscal e

tube-snou t pipefishe s kel p pipefis h ba y pipefis h

auror a rockfis h splitnos e rockfis h shortbell y rockfis h co w co d blu e rockfis h bocacci o stripetail rockfis h rockfishe s rockfishe s rockfishe s rockfishe s rockfishe s rockfishe s rockfishe s rockfishe s rockfishe s rockfishe s rockfishe s thomvhead s (continued)

TENER A E9-055. 0 5-1 0 Fina l 316(b ) Demonstratio n Marc h 1.200 0P.2 4 5. 0 Result s Tabl e 5.1-1 . (cont'd )
Orde r Suborde r Famil y Genu s & Specie s Commo n Nam e Scorpaeniforme s (cont'd ) Hexagrammoide i Hexagrammida e

Cottoide i Cottida e

Agonida e
Cyclopterida e greenling s

Hexagrammos spp . Ophiodon elongatus Girar d185 4 Oxyiebius pic tus Gil l 186 2 Zaniolepis spp . Zaniolepis frenata Eigenman n & Eigenman n 1 88 9 Zaniolepis latipinnis Girar d185 8 sculpin s Artedius spp . Artedius harringtoni (Stark s 1896 ) Artedius lateralis (Girar d1854 ) Chitonotus /

Icelinus Chitonotus pugetensis (Steindachne r 1876 ) Clinocottus spp . Clinocottus analis (Girar d1858 ) Clinocottus embryum (Jorda n & Stark s 1895 ) Enophrys spp . Hemilepidotus spinosus (Ayre s 1854 ) Icelinus spp . Icelinus guadriseriatus (Lockingto n 1880 ) Leptocottus armatus Girar d185 4 Nautichthys oculofasciatus (Girar d1858 ) OUgocottus spp . OUgocottus maculosus Girar d185 6 OUgocottus snyderi Greele y 189 8 Orthonopias triads Stark s & Man n 191 1 Radulinus spp . Ruscarius creaseri (Hubb s 1926 ) Ruscarius meanyi Jorda n & Stark s 189 5 Scorpaenichthys marmoratus (Ayre s 1854 ) Synchirus gilli Bea n 189 0 poacher s Odontopyxis trispinosa Lockingto n 188 0 Stellerina xyosterna (Jorda n & Gilber t

1880 ) snailfishe s Liparis spp . greenling s lingco d painte dgreenlin g combfishe s shortspin e combfis h longspin e combfis h sculpi n scalyhea dsculpi n smoothhea d sculpi n sculpi n roughbac k

sculpi n sculpin s wool y sculpi n calic o sculpi n sculpi n brow n Iris h lor d sculpi n yellowchi n sculpi n staghor n sculpi n sailfi n sculpi n sculpi n tidepoo l sculpi n fluff y sculpi n snubnos e sculpi n sculpi n roughchee k

sculpi n Puge t Soun dsculpi n cabezo n manacle dsculpi n pygm y poache r pricklebreas t

poache r snailfishe s Perciforme s Percoide i Serranida e se abasse s

Paralabrax

spp . Paralabrax

clathratus (Girar d1854 ) san dbasse s kel p bas s (continued)

TENER A E9-055. 0 5-1 1 Fina l 316(b ) Demonstratio n Marc h 1.200 0P.2 5 5. 0 Result s Tabl e 5.1-1 . (cont'd )
Orde r Suborde r Famil y Perciforme s (cont'd ) Percoide i Carangida e Haemulida e
Sciaenida e

Kyphosida e Pomacentrida e Sphyraenida e Labroide i Labrida e
Zoarcoide i Bathymasterida e Stichaeida e

Pholidida e Blennioide i Clinida e Chaenopsida e Blenniida e
Icosteoide i Icosteida e Genu s & Specie s jack s Trachurus symmetricus (Ayre s 1855 ) grunt s Xenistius californiensis (Steindachne r

1875 ) drum s Atractoscion nobilis (Ayre s 1860 ) Cheilotrema saturnum (Girar d1858 ) Genyonemus lineatus (Ayre s 1855 ) Menticirrhus undulatus (Girar d1854 ) Roncador stearnsi (Steindachne r

1875 ) Seriphus politus Ayre s 186 0 Umbrina roncador Jorda n & Gilber t

188 2 se achub s Girella nigricans (Ayer s 1860 ) damselfishe s Chromis punctipinnis (Coope r 1863 ) barracuda s Sphyraena argentea Girar d185 4
wrasse s Oxyjulis californica (Gunthe r 1861 ) Semicossyphus pulcher

(Ayre s 1854 ) ronquil s Rathbunella spp . prickleback s Cebidichthys violaceus (Girar d1854 ) Chirolophis nugator (Jorda n & William s 1895 ) Plectobranchus evides Gilber t 189 0 gunnel s clini dkelpfishe s Gibbonsia spp . Heterostichus rostratus Girar d185 4 tub e blennie s Neoclinus spp . combtoot h blennie s Hypsoblennius spp . Hypsoblennius gilberti (Jorda n 1882 ) ragfishe s Icostens aenigmaticus Lockingto n 188 0 Commo n Nam e

jac k mackere l salem a
whit e seabas s blac k croake r whit e croake r Californi acorbin a spotfi n croake r queenfis h yellowfi n croake r opaley e blacksmit h Pacifi c barracud a
senorit a Californi asheephea d ronquil s monkeyfac e ee l mosshead warbonne t bluebarre dpricklebac k

clini dkelpfishe s gian t kelpfis h fringehea d blennie s rockpoo l blenn y ragfis h (continued )
TENER A E9-055. 0 5-1 2 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.2 6 5. 0 Result s Tabl e 5.1-1 . (cont'd )
Orde r Suborder Famil

y Perciforme s (cont'd ) Percoide i Trachinoidei Ammodytida

e Gobioide i Gobiida e Genu

s & Species

san d lance s Ammodytes hexapterus Palla s 181 4 gobie s Coryphopterus nicholsi (Bea n 1882 ) Eucyclogobius newberryi (Girar d 1856) Lepidogobius lepidus (Girar d 1858 ) Lythrypnus spp . Lythrypnus dalli (Gilber t 1890) Lythrypnus zebra (Gilber t 1890 ) Typhlogobius californiensis Commo n Nam e

Pacific san

d lanc e blackey e gob

y tidewate r gob y ba y goby gobie s bluebanded gob

y zebr agob y blind gob y Scombroide i Scombrida e Stromateoidei Centrolophida e Tetragonuridae Stromateidae Pleuronectiforme s Pleuronectoide i Paralichthyidae

Pleuronectida e Steindachne r 187 9

mackerel s Scomber japonicus Houttuyn 178 2 medusafishe s Icichthys lockingtoni Jorda n & Gilber

t188 0 squaretail s Tetragonurus cuvieri Riss o 181 0 butterfish.e

s Peprilus simillimus (Ayre s 1860 ) leftey e flounders Citharichthys spp . Citharichthys sordidus (Girar d1854 ) Citharichthys stigmaeus Jorda n & Gilber

t188 2 Hippoglossina stomata Eigenmann & Eigenmann 189 0 Paralichthys califomicus (Ayre s 1859 ) Xystreurys liolepis Jorda n & Gilber

t188 0 rightey e flounders Embassichthys bathybius (Gilber t 1890 ) Eopsetta exilis (Jorda

n & Gilber

t1880 ) Errex zachirus (Lockingto n 1879 ) Hypsopsetta guttulata (Girar d1856 ) Lepidopsetta bilineata (Ayre s 1855 ) Microstomus pacificus (Lockingto n 1879 ) Parophrys vetulus (Girar d1854 ) Platichthys stellatus (Palla s 1787 ) Pacifi c mackere l
medus a fis h

sma l ley e squaretai

l Pacifi c butterfish

sandda b Pacifi c sandda

b speckle d sandda

b bigmout h sol e Californi a halibut fantai l sol e deepse a sol e slende r sol e re x sol e diamond turbo

t roc k sol e Dove r sol e Englis h sol e starr y flounde r (continued )

TENER A E9-055. 0 5-1 3 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.2 7 5. 0 Result s Tabl e 5.1-1 . (cont'd ) Order Suborder Famil

y Genus & Species Commo n Nam e Pleuronectiforme s Pleuronectoide

i Pleuronectida

e

Soleioide i Cynoglossida

e UnidentifiedLarva

l Fishes : rightey e flounder s Pleuronectes spp . Pleuronectes isolepis (Lockingto n 1880 ) Pleuronichthys spp . Pleuronichthys coenosus Girar d1854 Pleuronichthys ritteri Stark s & Morri s 190

7 Pleuronichthys verticalis Jorda n & Gilber

t 188 0 Psettichthys melanostictus Girar d1854 tonguefishe s Symphurus atricauda —- (Jorda n & Gilber

t 1880) rightey e flounder s butte r sol e turbot s c- o turbot spone dturbo t homyhea dturbot san dsol e Californi atonguefish Whole larva

l fishe s Damage dlarva l fishe s Larva l fish fragments

TENER A E9-055. 0 5-1 4 Fina l 316(b ) Demonstratio n Marc h 1,200 05. 0 Result s

Tabl e 5.1-2 . Tota

l abundance , weigh

t (grams) , an

daverag e biomas s (grams/millio n n P flow) o f impinge dfishes a

t Diabl o Canyon Powe

r Plan t (DCPP) durin g 1985-86
. Abundanc e an dweigh t ar e total s fo r th e samplin g periods ; biomas s i s th e numbe r o f gram s pe r millio n n>

3 o f wate r flo w durin g th e collectio n periods
.

Taso n Scientifi c Nam e

BON Y FISHE S (Osteicbthyes ) Engraulidida e Batrachoidida e Ophidida e Gobiesocida e Atherinida e Gasterosteida e Syngnathida e Scorpaenida e

Hexagrammida e
Cottida e

Agonida e Cyclopterida e Carangida e Sciaenida e Embiotocida e

Labrida e Pomacentrida e Clinida e

Stichaeida e Pholida e Scombrida e Cynoglossida e Paralichthyida e Pleuronectida e Engrattlis mordax

Porichthys notatus Chilara taylort Gobiesox maeattdricus Atherinops affinis Auloryhynchus flavidus Syngnathus californiensis Syngnathus spp . Syngnathida e unid . Sebastes atroviretts Sebastes carnatus Sebastesflavidus Sebastes jordani Sebastes melanops Sebastes mystinus Sebastes paucispinis Sebastes rastrelliger Sebastes serranoides
• Sebastes serranoides/ftavidus Sebastes spp . Hexagrammos decagrammtts Oxyiebius pictus Zaniolepis /atipitmis Artedius creaseri Artedius carallinus Artedius lateralis Artedius notosplitotus Cottida e OUgocottus mtmtiasns OUgocottus rubellio Orthonopias triads Scorpaenichthys marmoratus Agonopsis sterlrhts Liparis mucosus Trachurus symmetricus Seriphus potitus Amphislichus argenteus Brachyistius fremitus Cymatogasteraggregata Embiotoca jacksoni Embiotoca lateralis Embiotocida e Hyperprosopon argenteum Micrometrus minimus Phanerodon furcatus Oxyjulis californica Chromis pttnetipimtis Gibbonsia erythra Gibbonsia melzi Gibbonsia montereyensis Gibbonsia spp . Anoplarchtts pttrpurescens Ulvicola sunctaerosue Xerepes fttcorum Scomberjaponicus Symphurus atricauda ('ilharichlhys stigmaeus Xystreurys liolepis Pleuronectida e unid . Microslomns pacificus Plettrottichlhys coenosus

Shark s an d Ray s (Chondrichthyes ) Rajida c Torpedinida e Platyrhinida e Dasyatidida e Chimerida e Raja binoculata

Torpedo californica PlatyrhinoiiMs triseriata (Irotophus halteri Hydrolagus collet Commo n Nam e Tota l Al l Fi.hu : norther n anchovy plainfi n midshipman spotte d cusk-ee l notlhern clingfis h topsmel t tubesnout kel p pipefis h unidentifie d pipefis h unidentifie d pipefis h kel p rockfis h gophe r rockfish yellowtai l rockfis h shortbell y rockfis h blac k rockfis h blu e rockfis h boccaci o gras s rockfis h oliv e rockfis h olive/yellowtai l rockfish unidentifie d rockfish kel p greenlin g painted greenlin g longspin e combfis h roughcheek sculpi n corallin e sculpi n smoothhea d sculpi n bonyhead sculpi n unidentifie d sculpi n tidepoo l sculpi n rosy sculpi n snubnos e sculpi n cabezo n souther n poache r slim y snailfis h jac k mackerel queenfis h barre d surfperc

h kel p surfperc

h shine r surfperc

h black surfperc

h stripe d surfperc

h unidentifie d surfperc

h walley e surfperc

h dwar f surfperc h whit e surfperc

h senorit a blacksmit h scarletkelpfis h striped kelpfis h crevic e kelpfis h unidentifie d kelpfis h hig h cockscom b kel p gunnel rockweed gunne l Pacifi c mackere

l Californi a tonguefis h speckle d sandda

b fantai l sol e unidentifie d uirbotor sol e dove r sol e C- 0 turbo

t Tota l Fishes : bi g skate Pacifi c electri c ra

y thornbac k ra y round stingra

y spone d ratfis

h Tota l Shark s an d Rays : 02/05/8 5 - 03/31/8 5 Uni tI Abun . Weigh t 1 1 142 1

1 23. 8

1 4 8

1 70. 2

1 14 3 1

1 5 8

1 273 4

1 296. 3 1 6 4

1 2 0 7

9 844. 5

1 37 4 4 1 202. 1

2 576. 5 Bio .

6.4 9

0 1 1

0.0 2

0 3 2

0 6 5

0.0 3

1.2 4

13 5 0.0 3 0.0 3

00 9

3.8 7

17 0 09 2

2.6 2 Unit i Uni t2

Abundanc e 26 2

I I 2 1 7 8 2 6 2 3 4 1 5 2 1 9 7 6 1 1 1 8 7 1 1 1 2 5 1 1 1 2 2 6 17 2 3 3 2 1 1 1 8 4 2 1 1 2 2 4 9 1 1 22 3 3 1 0 2 3 3 3 9 14 0

1 8 1 2 6 4 1 3 1 1 4 1 3 9 3 2 1 2 3

4 1 3 7 3

3 1 1 2 2 2 2 1 2

10 0 2 4 3 2 1 1 4 0 04/01/8 5 - Unit i 03/31/8 6

Uni t2 Weigh t I4441 J

1056 6 2 6 11. 0 14 5 143 5 6 9 0. 7 509. 2 8 4 207 3 1 6 3 9 326 4 7. 8 484. 7 46. 3 21. 4 5 9 29. 3 2 4 74 4 37. 7 2. 3 3 5 3. 1 9. 2 29 2 4. 9 3. 0 329 4 8. 2 1 0 0 7 9 8 212. 3 517 4 190 7 45. 3 23. 0 7. 7 3 6 109 5 145. 0 16 4 26 5 3. 3 8 5 80 1 7 6. 8 4. 7 869 2 1 7 32 8 74. 8 6586. 0 86 0 183 0 2 4687 4 1251. 7 7855. 3 12746. 2

24. 0 658. 2 7. 7 55. 5 23. 2 40. 2 5. 3 21. 9 2. 0 144. 5 3 4 15 2 1 543. 4 16. 2 6. 5 29. 0 6. 2 12. 8

22. 7 7. 8 386 8 40. 5 29. 1

103. 8 4. 1 16 0 66, 7 12. 8 4, 7 55 5 2 3 4 4 9 733 4

3261. 8 73.6 69 3 2 7475. 9 407. 9 833. 8 94*4. 4 Uni t1 Uni t2

Biomas s 65.6 4

4.8 0 00 1 O.O S 0.0 7 06 5 0.0 3 <0.0 l 2.3 1 00 4 0.9 4 0.0 1 0.0 2 1.48 0.0 4 2.2 0 0.2 1 0.1 0 0.0 3 0.1 3 00 1 0.3 4 0.1 7 .0.0 1 0.0 2 0.0 1 0.0 4 0.1 3 0.0 2 0.0 1 IS O 00 4 0.0 5 0 3 6 09 7 2.3 5 0 8 7 0.2 1 0.1 0 00 4 0.0 2 0.5 0 0.6 6 0 0 7 0 1 2 0.0 2 00 4 36 4 00 3 0.0 2 3 9 5 0.0 1 0 1 5 0 3 4 29.9 4 03 9 8.3 2 21.3 1 56 9 35.7 1 148.2 1

0.2 8 76 5 0.0 9 06 5 0.2 7 04 7 0.0 6 0.2 5 0.0 2 16 8 00 4 1.7 7 6.3 2 0 1 9 0.0 5 03 4 00 7 0.1 5

0.2 6 0.0 9 4.5 0 0.4 7 03 4

1 2 1 0 0 5 0 1 9 0 7 8 01 5 00 5 06 5 0.2 7 0.0 6 85 3

37.9 3 08 6 80 6 869 3 4.7 4 9 7 0 110.2 8 TENER A E9-055. 0 5-1 5 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.2 9 5. 0 Result s
Tabl e 5.1-3 . Biomas s (grams/millio n m ^ flow) o f impinge dCancer

spp . crab s a tDCPP fro

m Apri l 198 5 throug h Marc h 1986
. Specie s Uni t 1 Uni t 2 21.6 9 0.8 8 1.9 7 0.27 Cancer antennarius Cancer anthonyi Cancer productus Cancerjordani Cancer magister Cancer spp . Cancer gracilis 27.4 3 0.0 2 0.47 0.42 0.0 1 0.0 3 0.2 9 0.0 1 TOTA L 28.6 7 24.8 2

TENERA E9-055. 0 5-1 6 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 0
5. 0 Result s
Re d Se a Urchin s (Strongylocentrotus franciscanus)

t H I 1.7 7 1.6 - 1.5 7 1.4 - 1.3 - 1. 2 1. 1 1. 0 0. 9 o. s 0. 7 0.6 - os ~ 0.4 - 0.3 - 0.2 ~ 0.1 - 0.0 - T ? M l II I I II I 11I I M l II I IIIII I I Hil l 111 1 • 1111111111 T11 1 1111111111 1 11 1 DJFMAM J Surve y Dat e

• Ctosignatessurveywithdensity= 0

Purpl e Se a Urchin s (Strongylocentrotus purpuratus)

1 = U J 

# I

CO c C 9 O

c & I S

1 4 - 1 3 - 1 2 - 1 1 ~ 1 0 - 9 - 8 — 7 - 6 - 5 - 4 - 3 - 2 " 1 - 0 - 

# i i L IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII|II I IJFMAMJJ A fi'ininnfifrinfir » 1111 1 H I 11 1 .lis i Ilia

. J 1 1 IIIIIII I 11 1 ni l N I D I J I F |

I I III I IIIIII I M A M 1 1 IIIII I III I I

J J A 1111111111111 1

S O N IIIIIIIIIIIIIIIIIIIIIIMI I

J F M A I M | J Surve y Dat e

• designalessurveywrthdensity= 0 Figur e 5.1-1 . Weekl

y mea n larva l densit y (#/m3 + 1 S.E. ) a

t th e DCP P intake
. Y-axi s scal e varie s betwee

n graphs
. TENERA E9-055. 0 5-1 7 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 1

« ~ 5 

# I U - 3 «
o ° 1 

### o 1 .> . " 5 D n 5. 0 Result s

DCP P Uni t 1 Flo wDurin g Weekl y Impingemen t Samplin g 1985-198 6

Fe b Ma r , Ap r Ma y Ju n Ju l Au g Se p Oc t No v De c Ja n Fa b 198 5 198 6 Numbe r o f Uni t 1 Travelin g Screen s Operatin g Durin g Weekl y Impingemen t Samplin g 1985-198 6 w 8 * * E « 3 2 

# i

Fa b M v Ap r Ma y Ju n Ju l Au g Se p Oc t No

v Oa

e Ja n Fa b 198 5 198 6

Zr« i o £ 

# i

_ c • 5 o u "( 5 o 2 DCP P Uni t 2 Flo wDurin g Weekl y Impingemen t Samplin g 1985-198 6

Fe b Ma r Ap r Ma y Ju n Ju l Au g Se p O o \o v Oe c Je n Fe b 198 5 198 6 Numbe r o f Uni t 2 Travelin g Screen s Operatin g Durin g Weekl y Impingemen t Samplin g 1985-198 6
0 ) 6 5 2 Fe b Ma r Ap r Ma y Ju n Ju l Au g Se p Oc t No v Oe c Ja n Fe b Ma r 198 5 198 6 Figur e 5.1-2
. DCP

P intak e operationa

l status : coolin g wate

r pum p (CWP ) daily wate

r flow an d numbe r o f travelin g screen s operatin g o n impingemen

t samplin g days
. Bol dbar s indicat e day s whe n all pump s an

dtravelin g screen s operate dconcurrently
. Eac h unit ha s tw o pump s an

dseve n travelin g screen s (si x fo

r th e CW P an done fo r th e auxiliar

y seawate r system)
.
TENER A E9-055. 0 5-1 8 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 2 5. 0 Result s UNIT I

o

_ Q E 3 3 0 2 0 1 0 Uni t 1 Fishe s (n )

N o sample s 2 4 Ma r to 2 9 Apr"" " 1 1 shine r surfperc h No . sample s o n 2 De c 

# /—T^' V K^v^T V Ja n Fe b Ma r Ap r Ma y Ju n Ju l Au g Se p Oc t No v Dec Ja n Fe b Ma r Ap r

~ 300 0 200 0 198 5 198 6

100 0 Uni t 1 Weigh t (g ) 

# ^A^^ZyJ\ P^" ** vJWV. A Ja n Fe b Ma r Ap r Ma y Ju n Ju l Aug Se p Oc t No v Oe c Ja n Fe b Ma r Ap r

E a o > a • c

2 E

_ c O l 

# 1 25 0 20 0 4 - 15 0 10 0 - 5 0 .. . _•>

_ ^rm* 3 * 1 1 -H— - 1 1 1 . . « /

. . •

J 1 1 1 «4— « 1 1 ! 1 Ja n Fe b Ma r Ap r Ma y Ju n Ju l Au g Se p Oc t No v Dec Ja n Fe b Ma r Ap r UNTT2 3 0 2 0 1 0 Uni t 2 Fishe s (n ) 1 4 juvenil e 10thombackrays --rockfis h j7 .t'g'tw a

Ja n Fe b Ma r Ap r Ma y Ju n Ju l Au g Se p Oc t No v Dec Ja n Fe b Ma r Ap r a 300 0 200 0 198 5 198 6

100 0 Uni t 2 Weigh t (g ) 10tnombackrays 5 thombac k

ray s No Uni t 2 Impingemen

t

. Sa m plin g 24 Ap

r t o 3 0 Jul . 

# \s\
Ja n Fe b Ma

r Ap r Ma y Ju n Ju l Aug Se p Oc t No v De c Ja n Fe b Ma r Ap r

o > a o a 25 0

20 0 15 0 10 0 5 0 Uni t 2 Debri s (gal )

- * • ' » > . •"••.-• • • Ja n Fe b Ma r Ap r Ma y Ju n Ju l Au g Se p Oc

t No v Dec Ja n Fe b Ma r Ap r Figur e 5.1- 3 Compariso n o f fish abundanc e (n ) an

dweigh t (g) , an dseaweeddebri s yolum

e (gallons ) collecte di

n DCP P Unit 1 an d2 impingemen

t samples
. TENER A E9-055. 0 5-1 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 3



# Blan k Pag eP.3 4 5.2. 1 Cancer

Crab s 

## 5. 2 Assessmen t of Effect s o n Targe t Taxa The effect s o f

larva l entrainmen

t mortalit y cause db

y th e DCP P cooling wate

r intak e syste mwer e assesse dfo

r 1 6 targe t taxa . I n th e following sections , lif e histor y an ddistributio n information describin g th e adul t

an dearly lif e stage s o f thes e tax awer

e summarizedto giv e context to th e subsequen t estimate s o f

entrainmen

t effects
. Th

e datagenerate dfro

mth e variou s samplin g program s wer

e then use dto estimat

e effect s o f

larva l entrainmen

t mortalit y usin g demographi c dat afo r hindcastin g (FH) or

predictio n (AEL) o f

adult losses , or wer e translate ddirectl y int

o proportiona

l annua l losse s t o th e loca

l larva l populatio n (P

M ). 

### 5.2.1 Assessment

of Target Taxa in the Crab Genus Cance r Crab s ofth e genu s Cancer ar e widely distribute di

n coasta l water s ofth e wes t

coas t o f Nort h Americ a(Nation s 1975)
. The y occu r i n intertida l an dshallo w subtida

l habitat s o

n bot h roc k an d san dsubstrate
. Ofth e nine specie s know n t o occur i n th e northeas t

Pacific , fou

r specie s contribute t o economically significan t fisheries
. Dungenes s cra

b (Cancer magister) ha s th e highes t economi c valu e amon g these , an dthre e specie s o f

roc k crab s (C. anthonyi, C. antennarius, an

dC
. productus) compris e th e remainde r ofth e catches
. Seve

n specie s o f

Cancer larva e hav e bee n collecte di

n the DCP P entrainmen

t stud y an dar e listedher

e (i n orde r o f relativ e abundance) : Commo n nam e Scientifi c Nam e Brow n rock cra b C. antennarius Slende r cra b C
. gracilis Hair y roc k cra b C
. jordani Re droc k cra b C
. productus Yello w cra

b C. anthonyi Dungenes s cra

b C
. magister unknow n sp . A Cancer spp .

TENER A E9-055. 0 5-2 0 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 5 5.2. 1 CancerCrab s Th e tw o mos t

abundant specie s (brown roc

k cra b an dslender crab ) wer e selecte dfo

r adetaile d impact assessment

i n thi s report . Th e othe

r five specie s wer

e not consistently abundan

t enough i n th e stud y t o b e analyzed
. All specie s o f

Cancer crab s shar

e certai n fundamenta

l lif e histor y traits
. Egg s ar

e extrude dfro

m th e ovarie s throug h a

n oviduc t an dar e carrie di n asponge-lik

e mas s beneat

h th e abdomina

l flap ofth e adult

female
. Afte

r adevelopment

perio do f severa l weeks , th e egg s hatch an

dapre-zoe a larv aemerges , beginnin g th e planktoni c lif e histor y phase
. A s i

n all crustaceans , growt

h progresse s throug h aserie s o f molts
. The planktoni c larva e advanc e throug h si x stage s o f successiv e increase s i

n size : five zoe a(no t

includin g th e brie f

pre-zoe astage ) an

don e megalopal
. Afte r severa l week s a s planktoni c larvae , th e crab s metamorphos e int o th e first cra b stag e (firs t instar) an dsettl e out

t o begi n thei r

benthi c lif

e histor y phase
. Maturit

y i s generall y attaine dwithi n 1- 2 yr . Matur

e female s mate whil e i

n th e sof t shel l molt

conditio n an

dextrude fertilize degg s onto th e abdomina

l pleopods
. Female s generally produc e one o r tw o batche s pe

r yr , typicall y i

n winter
. Fecundit

y pe r batch increase s significantly wit h femal e bod

y siz e (Hine s 1991)
. Each specie s i

n th e genu s ha s characteristi c difference s i n distribution , preferre dhabitat , growt h rates , an ddemographi c parameters . Fo r example , brown rock

cra b i s arelativel y larg e specie s (carapac e widt

h >20 0 mm) tha

t live s primarily o

n san dan dmu dsubstrate s i

n estuarin e an

d coasta l shel f areas . Slende

r cra b i s asmalle

r specie s (carapac e widt

h >13 0 mm

) associate dwit

h mixedrock-san dsubstrate s i n shallo w outer

coas t habitats
. Maximu

mclutch size s i

n Cancer crab s ca n rang e fro

ma s man y a s 5,000,00 0 egg s i

n C
. anthonyi t o approximately 50,00 0 i n C
. oregonensis, on e ofth e smaller specie s (Hine s 1991)
. Thes e type s o f difference s imply tha

t specifi c informatio n o

n lif e histor y parameter s canno t

readil y b e generalize damon g Cancer species
. Roc k crab s ar e fishedalon g th e entire Californi acoas t (Leet et al
. 1992)
. Thre e specie s ar e harveste dcommercially : brown roc k crab , redroc

k crab , an dyello w crab
. Ther

e i s n o commercia

l fisher y fo r th e slender

crab
. The rock

cra b fishery i s mos t

importan t i n southe m Californi a(fro

mMorr o Ba y south) , which produce s amajorit y ofth e landings , an

do f lesser
TENER A E9-055. 0 5-2 1 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 6 

# I 5.2. 1 Cancer Crab s importanc e i

n norther n area s o f Californi awher

e afisher y fo r th e mor e desirabl e Dungenes s cra

b take s place
. Recreationa

l crabbin g i s popula

r i n man y area s an di s ofte n conducte di

n conjunction wit h othe r fishing activities
. The commercia l harves t ha s bee n difficul t t o asses s o

n aspecies-by

specie s basi s becaus e th e fisher y statistic s ar

e combinedint

o th e genera

l "rock crab " category . Roc k cra b landing s i

n Californi ai

n 1990 wer

e 81 8 MT , includin g th e landing s o f cra b claw s only tha t wer e converte dt o whol e weigh t (Leet e t al
. 1992)
. Roc

k cra b landing s fro

mfive port s nea

r th e Montere

y Ba y Nationa l Marine Sanctuar

y average d9 2 MT/y

r fro m1980-199 5 (Star

r et al
. 1998)
. 

### 5.2.1. 1 Brow n roc k

cra b (Cancer

antennarius)

Cancer antennarius Stimpson 1856 ; brow n roc k crab ; carapac e widt

h t o 15. 5 c m(6. 1 in) ; Quee

n Charlott e Sound , Britis h Columbi at o Cab o Sa n Lucas , Baj aCalifornia ; intertida

l to >10 0 m(32 8 ft) ; mottle ddar k brow n dorsally wit h re dspottin g ove

r awhit e backgroundventrall y (Jensen 1995 ; Carroll an dWin n 1989)
. Th e brow n roc k cra b primarily inhabit s rock

y shore s an

drock y subtida l reef s bu t ma y bur y i n coars e t o silt

y sand s adjacen

t to preferredhabitat
. Ovigerou s brown roc k crab s hav e bee

n observe dburiedi

n san da t th e bas e o f

rock s i n shallo w wate

r an dar e foun dmor e commonl

y i n wate r les s tha n 1 8 m(5 9 ft) dee

p i n souther n California
. Brow

n roc k cra b female s ca

n extrude betwee n approximately 156,000 an d5 millio n egg s pe

r batch (Hine s 1991 ; Tabl e 5.2.1-1)
. Female s o n averag e produc e asingl e batc h pe r year ; however , due t o occasiona l multipl e spawnings , th e averag e numbe r o f batche s pe

r yea r ma y b e greate

r tha n one (Carroll 1982)
.
TENER A E9-055. 0 5-2 2 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 7 5.2. 1 Cancer

Crab s Egg s requir

e a developmen ttim e o f

approximatel y 7- 8 w

k fro m extrusio n t o hatchin g (Carroll 1982) . Larva

l developmen ti

n th e brown roc

k cra b wa s describe d b y Roesijad i (1976) . Egg s hatc h into pre-zoe a larvae tha tmol tt o firststag e zoe a i n les s tha n l h . Averag e larva

l developmen ttim e (from hatchin g through completio n ofth e fifth stage ) wa s 3 6 d a t13. 8 °C . Althoug h som e crab s molte d t o th e megalop s stage , non e molte d t o th e firstcra b instar stage , s o th e actua l duration ofth e megalop s stag e i s unknown . A reasonabl e estimat e can b e derive d fro m studie s o f slender'crab b y All y (1975) , wh o found a n averag e duration o f

megalop s stag e o f 14. 6 d . Therefore , th e estimate d lengt h o f tim e fro m hatchin g t o settlin g fo r brow n roc k cra b i s approximatel y 5 0 d.- Durin g thei r planktoni c existence , cra b larvae ca

n becom e widel y distribute d i n nearshore waters . I n a stud y in Montere y Bay , Graha m (1989 ) foun d tha

tbrown rock cra

b stag e 1 zoea e ar

e mos t abundan tclos e t o shor e an

d tha tsubsequen tzoe a stage s ten d t o remain withi n a fe w kilometer s o f th e coastline . Th e adul tpopulatio n primaril y reside s i n relativel y shallo w rocky areas , an d th e nearshore retentio n o f

larvae in Graham' s stud y (1989 ) wa s relate d t o th e formatio n o f a n oceanographi c fronta

l zon e in norther

n Montere y Ba y tha

tprevente d substantia

l offshor e transpor tduring upwellin g periods . Th e nearshore distributio n o f cra b larvae depend s upon developmenta l stage . Shanks (1985 ) presente d evidenc e tha

tearl y stag e larvae o f

roc k crab s (probabl y yello w cra b in hi s souther

n Californi a study ) generall y occu r near th e bottom , i n depth s u

p t o 8 0 m ; lat

e stag e larvae , however , wer e more abundan tnear th e surface . H e suggeste d tha ta combinatio n o f

physical factor s (primaril y includin g wind-generate d surface current s an d tidall y force d interna

l waves ) cause d megalopa e t o b e transported shoreward . Lat e stag e larvae (megalops ) generall y begi n t o recruitt o th e nearshore habita ti n sprin g (Win n 1985) . There ar e n o publishe d estimate s o f brow n roc k cra b larva l mortality . However , dat a fro m th e abundanc e o f

zoe a an d megalop s i

n th e DCP

P entrainmentsubsample s (Appendi x I ) ca n b e use d t o estimat e mortalit

y betwee n stages . Firs tstag e zoe a ofth e tax a Cancerantennarius, C. anthonyi, an

d C . gracilis (combine d becaus e o f uncertaintie s i n identification ) wer e substantiall y
TENERA E9-055. 0 5-2 3 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.3 8 5.2. 1 Cancer

Crab s

mor e abundant , o

n average , tha

n all othe r stage s combined
. The proportion s o f eac h specie s of zoe astag e 1 wer

e derivedb

y usin g th e proportion s o f

eac h specie s i n zoe astag e 2 tha

t couldb e identifie dto species
. Larva l mortalit y o f brow n roc k cra b wa s estimate dfro

mth e entrainmen

t dat ab y comparin g adjuste

dabundance s o f

zoe astag e 1 to abundanc e o f megalops
. Intermediat

e stage s 2 , 3,4 , an

d5 wer e no t usedi n th e estimate becaus e they wer e significantly affectedb

y offshor e transpor t ou t ofth e stud

y gri dan dwould , therefore , b e under-represente di n th e subsample s (Paul Reilly , Californi aDepartmen t o f Fish an dGame , pers . comm.)
. Megalop s o f all specie s wer

e mor e abundan t tha n zoe astag e 5 i

n th e entrainmen

t subsamples , indicatin g tha t many ofth e developin g megalop s wer e being transporte dbac

k towar dshore
. A n instantaneou s larva

l mortalit y o f 0.158/ d wa s estimate db

y fitting a n exponentia

l curv e to the estimate dnumber s o f

entraine dzoe astag e 1 (Decembe r 199 6 throug h Jun e 1998 ) an dmegalop s (mi dJanuar

y 1997 through midAugus t 1998 ) an dusin g 3 8 da s th e tim e betwee n stage s (i.e. , 5 d and43. 3 d , respectively)
. Thi s procedur e i s full y describe di

n th e followin g sectio n concernin g fecundit y hindcasting
. Becaus e brown roc k cra b megalop s wer

e mor e abundan t clos e t o shor

e tha n slender cra b (Graha m1989) , th e mortalit

y rat e developedfo

r brow n roc k cra b i s als o applie dt o slende

r cra b larva e (Sectio n 5.2.1.2 ) tha

t als o hav e aduratio n o f

3 8 dbetwee

n zoe a an dmegalop s stages . Estimate dweigh

t a t ag e wa s use

di n interpretin g adult

equivalen t losse s t o th e population
. Brow n rock crab s matur

e a t a n ag e o f about 1 8 m o post-settlemen

t wit h asiz e o f approximately 60 m

m carapac e widt

h an daweigh t o f 7 3 g (Carrol l 1982)
. Faste

r growt h rate s ma y occu r i n highly productiv e environment s such a s on th e supportin g member s o f offshor e oi l platform s (Da

n Dugan , Tener

aEnvironmental , pers . comm.)
. A growt h curv e fo r brow n roc k cra b wa s estimate d basedo n asymptoti c carapac e widt h an dweigh t (15 5 m man d1,05 0 g fo

r males , 14 5 m man d 68 3 g fo r females) , an

dagrowt h rate betwee

n instar s fro

mtag recover

y dat a(rangin g fro

m7

- 2 6 % wit h smalle r crab s growin g a

t th e highes t

rate) , fo r amaximu mo f 12-1 3 post-larva

l instars
. Brow n roc k crab s ca n probably liv e to amaximu mag e o f abou t 6 yr . Siz e a

t recruitmen

t to the fisher y i s approximately 12

5 m mcarapac e widt

h a t ag e 4 y r fo r male s an d4. 5 yr fo r females
.

TENERA E9-055. 0 5-2 4 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 1 Cancer Crab s Summary

of Field Collections Brown rock

cra b zoeae wer

e remove dfro

msubsample s collecte da

t th e DCP P intak e structur e fro mDecembe

r 199 6 throug h Jun e 199 8 whil e megalopae wer e remove dfo

r th e perio dOctobe

r 199 6 throug h Jun e 1999
. Zoeae wer e remove dfro

monl y som

e ofth e subsample s collecte d durin g tw o gri dsurvey s i

n 1998
. Megalopa

e wer e remove dfro

msubsample s fro

mth e stud

y grid fro mJul y 1997 unti l Jun e 1999
. Estimate ddensit y (number s pe

r volum e o f water filtered ) o f zoeae an dmegalopae fro

mth e processe dsubsample s ar e presente di

n Appendix H . Th e estimate dweekl y number

o f zoeae andmegalopae entraine d(Appendix I ) wa s calculate dby multiplyin g th e estimate dlarva l densit y b y th e volum

e o f wate r drawn throug h th e CWS
. Abundanc e o f

bot h zoe aan dmegalop s wa s greates t

i n th e sprin g althoug h zoe a1 bega n t o appea r i n winter month s (Figure 5.2.1-1) . Larva l densitie s wer

e estimate dfro

mbong o net

subsample s collecte da

t th e DCPP intak

e structure between Octobe

r 199 6 an dJun e 1999 ; fo

r adail y samplin g event

there wer e generall y 3 2 t o 64 subsample s processe dfo r estimatin g megalop s densitie s an d8 subsample s processe dfo r estimatin g zoe adensities
. O f apossibl e 5,52

4 entrainment

subsample s processe dfo

r megalopae , 66 5 (12% ) were positiv e fo r brown roc k

crab
. Megalop s densitie s i n entrainment

subsample s wer e highes t durin g 1997 an

dlowes t i n 199 9 (Figur e 5.2.1-1) . Of 63 6 subsample s processe dfo r zoea , th e percentage s o f

subsample s b

y stag e were : 83 % zoe astag e 1,26 % zoe a2 , 14 % zoe a3 , 6 % zoe a4 an

d2 % zoe a5
. Megalop s densitie s i

n th e DCP P stud y gri dwer e highes t i n Ma y an dJun e o f 199 8 an d1999 , bu t muc h higher i n 199 8 tha n i n 199 9 (Figure 5.2.1-2)
. Of 3,16 8 bong o ne

t subsample s collecte di

n th e grid , 13 % containe dbrow n roc k cra b megalopae
. Estimating

Total Annual Entrainment Estimate s o f

annua l entrainmen

t (E T ) ofth e five zoe aan

done megalop s stage s o f

brown roc

k cra b durin g th e tw o analysi s period s (Decembe r 1 , 1996-Novembe

r 30 , 1997 andJul y 1 , 1997

— Jun e 30 , 1998 ) are presente di n Tabl e 5.2.1-2 . The dat

e ofth e first

analysi s perio dfo

r zoe awa s adjuste dfro

mOctober

199 6 through Septembe

r 199 7 t o Decembe

r 199 6 throug h November

199 7
TENERA E9-055. 0 5-2 5 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 0 5.2. 1 Cancer

Crab s becaus e the entrainmen

t subsample s collecte ddurin g Octobe r an dNovembe

r 199 6 wer e no t processe dfo

r zoea . Generally there wer

e fewe r individual s o f

each olde r stage . Although estimate s o f

zoe astage s 1-

4 abundance s wer

e approximately equa

l betwee n th e tw o analysi s periods , th e greate

r abundanc e o f

zoe astag e 5 durin g 199 8 fo r Analysi s Perio d3 (E T

= 111,000,000 ) di dnot

resul t i n a n increase dmegalop s abundance s fo r tha t period
. Estimate d megalop s abundanc e wa s actuall y greate r durin g 1997 , Analysi s Perio d1 (E T = 56,500,000 ) tha

n durin g 1998 , Analysi s Perio d3 (E T - 24,500,000)
. Th e estimate s o f annually-entraine dbrow

n rock cra b wer e no t adjuste dt o along-ter

maverag e becaus e cra

b larva e wer e no t enumerate di

n th e Intak e Cove surfac e plankto n to w samples
. Fecundity

Hindcasting

(FH j Th e FH metho drequire s age-specifi c mortalit y an dfecundit y t o asses s entrainmen

t effects
. A singl e valu e fo

r instantaneou s mortality , Z , wa s estimate dfo r th e tw o analysi s period s b

y fittin g a n exponentia

l curv e t o th e zoe a1 an

dmegalop s entrainment

estimates
. The surviva

l rate t o 43. 3 dpos t hatchin g wa s estimate dfo

r all larva l stage s usin g a

n exponentia

l surviva l model : N,=N 0 ez( '- h) wher e the estimate dentrainment o f zoe astag e 1 (NQ a

t time tQ =5 ) an

dmegalop s (Nt

a t time t=43.3 ) stage s wer

e usedt o estimat

e th e rat e Z . Zoe a1 abundanc e wa s estimate da s th e fraction o f brow n roc k cra b stag e 2 larva

e time s th e numbe

r ofth e unidentifie dzoe a1
. Th e instantaneou s mortalit y rate , Z , ca

n the n b e solvedfro

mth e tw o larva

l stag e abundance s (zoe a1 , Decembe r 199 6 through June 199 8 an

dmegalops , mi

dJanuar y 199 7 through mi

dAugus t 1998 ) a s f 34,600,000,00 0 " |



### _n 

### [ 80,100,00

0 J . , „ . Z=

——= 0.15 8 pe r da y . 43.3- 5 A n estimate dsurviva

l through larva

l stage s ca n then b e calculate da s S lanai . = e <_0158) ' , wher e / i s reporte di n Tabl e 5.2.1- 3 a s mea

n cumulativ e duration
. Cumulativ e surviva l estimate s t o stag e midpoin t wer e

TENER A E9-055. 0 5-2 6 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 1 5.2. 1 Cancer

Crab s 1 ) 

### 2 ) 3 ) 4 ) 5 ) zoe a 1 zoe a 2 zoe a 3 zoe a 4 zoe a 5 0.45 4

0.12 8 0.049 7 0.019 3 0.0063 7 6 ) megalop s 0.00107
. The FH approach combine s larva

l entrainment

losse s wit h surviva l an dadult fecundit y t o hindcas t th e number s o f

adul t female s effectively remove dfro mth e reproductivel y activ e population
. A

n estimate o f

mea n annua l fecundit y i s 1,756,45 0 eggs . The numbe r o f reproductiv e year s wa s estimate dby halvin g th e rang e betwee n ag e o f maturit y o f 1. 5 yr an dlongevit y o f 4 yr . A longevit y o f 4 y r wa s chosen becaus e o f

low abundanc e o f

older animal s foun

di n atrappin g stud y (Ja y Carroll , Tenera , pers . comm.)
. Coefficient s o f variatio n o f

survival , fecundity , an

d age s o f maturatio n an

dlongevit y are no t well known andar

e therefor e reasonably assume dt o b e 100 % wit h alognorma

l erro r structure . Th e numbe

r o f femal e brown rock

crab s estimate dt o produc e th e entraine dlarva e wa s calculate d fo r th e five zoe aandone megalop s stag e fo r th e two . All larva

l stage s wer

e hindcas t an dth e estimate dnumber s o f

female s an

dvariance s o f

estimate s wer

e addedt o comput

e a n estimate o f total numbe

r o f brown cra

b female s an

dth e varianc e ofth e estimate
. Th e estimate dFH

value s fo r zoe aan dmegalop s stage s fo

r th e perio dDecembe

r 1 , 199 6 throug h Novembe r 30 , 1997 fro

mTabl e 5.2.1- 2 wer

e FHi =17,50 0 female s wit

h SE(FH, ) = 39,00 0 FHi = 16,300 female s wit

h SE(FH2)= 38,10 0 FH 3 = 43,30 0 female s wit

h SE(FH,) = 104,000 FH, = 15,70

0 female s wit

h SE(FHr)= 37,40 0 FH, = 23 9 female s wit

h SE(FH,)= 62 6 FHMegs = 24,10 0 female s wit h SE(FHMegs) = 53,40 0 Th e tota l estimate dnumbe

r o f breedin g female s neededto produc e the tota l numbe r o f larva e entraine ddurin g th e perio dwa s calculate db y summing th e FH, ove

r all stages : TENER A E9-055. 0 5-2 7 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 1 Cancer Crabs
FH = 117,00 0 female s I 6 2 wit h SE(FH)=S^SE, (FH, J = 134,000
. A n approximat e 90 % confidenc e interva l fo r FH, V 1= 1 base do n alognorma l erro r structure , i s estimate da s 17,70 0 t o 773,00 0 females
. Th e estimate dFH

value s fo r

zoe aan d megalop s stage s fo r th e perio dJul y 1 , 199 7 throug h Jun e 30 , 199 8 fromTabl e 5.2.1- 2 wer e FH , = 18,60 0 female s with SE(FH t ) = 41,70 0 FHz = 13,40 0 female s with SE(FHz) = 30,50 0 FH, = 22,10 0 female s wit h SE(FH, ) = 51,70 0 FHr= 18,50 0 female s with SE(FH 4 ) = 46,30 0 FHs = 7,95 0 female s wit h SE(FHs ) = 20,10 0 FHuegs = 10,40 0 female s with SE(FH Me g s ) = 23,10 0 Th e tota l estimate dnumbe r o f breedin g female s neede dt o produc e th e tota l numbe r o f larva e entraine ddurin g thi s perio dwa s calculate db y summin g th e stag e specifi c estimate s a s FH = 91,00 0 female s

. I 6 2 wit h SE(FH)= jY 1 SE i (FHA = 91,800
. A n approximat e 90 % confidenc e interva l fo r FH, base do n alognorma l erro r structure , i s estimate da s 17,30 0 t o 478,00 0 females
. Sensitivit y Analysi s I n additio n t o calculatin g aconfidenc e interval , asensitivit y analysi s (Tabl e 5.2.1-2 ) for al l larval stage s wa s perfonne di

n whic h FH

wa s recompute db y varyin g th e inpu t paramete r

o f estimate d annua l entrainment , E T

, b y ± 1.64 5 SE I £ 7 - j an dsurvival , S, b y usin g amultiplicativ e eno r structur e (i.e
. Se ''' ) an dusin g CVl S\ = 1.0
. Th e rang e o f

surviva l estimate s for

al l stage s produce dth e sam e relativ e change s i n FH a s expecte dbase dupo n aconstan t multiplier
. However , FH

wa s les s sensitiv e t o entrainmen t tha n surviva l variation
. Thi s differenc e wa s greates t fo r th e megalop s stag e an dcan b e explaine db y th e us e o f samplin g varianc e for

TENER A E9-055. 0 5-2 8 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 3 5.2. 1 Cancer

Crab s
estimatin g entrainmentvariabilit y fo r al l stage s wit

h CT s o f clos e t o o r les s tha

n 100% . Therefore , improvemen ti n th e precisio n o f

FH ca n resul tfro

m improve d estimate s ofth e larva l stages ' survival . Female s tha

treac h reproductiv e siz e ar

e no tsubjec tt o fisher

y captur e du e t o thei r smal l size . Therefore , th e FH

shoul d b e extrapolate d t o fishery siz e becaus e itwil l provid e more meaningfu l result s fo r subsequen tcomparisons . Adul tsurvival can b e estimate d fo r brow n roc k cra b a s 0.08 8 yr 1 (base d o n dat a i n Carrol l 1982) . Hankin e tal . (1989 ) estimate d adul tsurvival fo r dungenes s cra

b exceedin g 155 m

m a s 0.1 1 yr^ . Therefore , th e estimate s o f FH(l 17,00 0 an

d 90,90 0 femal e crabs ) ca

n b e reasonabl y extende d t o ful l fishery recruitmentfro m th e representativ e femal e ag e o f 2. 3 y r (on e thir

d betwee n 1.

5 an d 4 yr ) b y applyin g a survival o f 0. 1 fo r a n additional year . Thi s woul d resul tin a population-wid e los s o f 11,70 0 an

d 9,10 0 a s th e tw o yearl y estimate s o f

fishery recruit-siz e female s los tdu e t o entrainment . Adult Equivalent

Loss (AEL J Th e AEL approac

h use s estimate s ofth e abundance o f entrained organism s t o projec tth e los s o f equivalen tnumbers o f

adults base d o n mortalit y schedule s an

d ag e a trecruitment . Survival rates fro m entrainmen to f

megalopa e t o recruitmentinto fishery ar e no tavailable . However , assumin g a 50:5 0 se x ratio , AEL an d FH can b e compare d a s AEL = 2FH = 234,00 0 an

d 182,00 0 adults , wit h a n associate d standar

d erro r o f SE(AEl) = 2SE(FH) = 269,00 0 an d 184,000 . T o reiterate , female s tha treac h reproductiv e siz e ar

e no tsubjectt o fishery capture du e t o thei r smal l size . Therefore , th e AEL als o shoul d b e extrapolate d t o fishery size . Adul tsurvival ca n b e estimate d fo r brow

n roc k cra b a s 0.08 8 yr 1 (Carroll 1982) . Hanki n e tal . (1989 ) estimate d adult surviva l fo r dungenes s cra b exceedin g 155 m

m a s 0.1 1 yr 1 . Therefore , th e estimat e of AEL (234,00 0 an

d 182,00 0 crabs ) can b e reasonabl y extende d t o full fishery recruitmentfro m th e representativ e femal e ag e o f 2. 3 y r (on e thir

d betwee n 1.

5 an d 4 yr ) b y applyin g a survival o f 0. 1 fo r a n additional year . Thi s woul d resul ti n a population-wid e los s o f 23,40 0 an

d 18,20 0 a s th e tw o yearl y estimate s o f

fisher y recruit s los tdu e t o entrainment.

TENER A E9-055. 0 5-2 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 4 5.2. 1 Cancer

Crab s Empirical

Transport

Model (ETM y Th e ETM assessment

require s estimate s o f

larva l stag e duratio n an

dlarva l densit y i n entrainment an dgri dsubsamples
. Th e cra b dat awer e collecte dfo

r only th e megalop s larva

l stag e i n th e gri d subsample s an

dwill b e comparedto megalop s stag e larva e i n th e entrainmen

t subsamples
. Tw o entrainmen

t mortalit y estimate s ar

e presented : fo

r July l , 199

7 through June 30 , 199 8 an d fo r July• 1 , 199 8 throug h Jun e 30 , 1999
. Brow n rock cra b larva e ma y b e susceptibl e t o entrainmen

t b y th e plan t fo r approximately 4 3 d , th e averag e ag e o f amegalop
. Although th e duratio n i s mor

e tha n one month , eac

h monthly survey perio d will b e assumedt o represent discret e group s o f

larvae , permittin g tw o independen t weighte destimate s o f

tota l entrainment mortalit y fro m2 4 subsamples
. Tota

l annua l entrainment

mortalit y (P M ) i s estimate dfro

mth e value s o f PE, an d/ fo r eac h survey perio d(Tabl e 5.2.1-4) , base do n larva l densitie s fro

m entrainment

(Figure 5.2.1-1 ) an

dgri dsurvey s (Figure 5.2.1-2)
. The proportio n ofth e populatio n withi n th e nearshore stud y gri dwa s basedo

n alinea r extrapolatio n o f

densitie s i

n th e gridi

n th e offshor

e directio n an

ddisplacemen

t i n th e alongshor

e direction
. Tabl e 5.2.1- 4 show s monthl y estimate s o f

entrainmen

t proportions , o f

survey perio dt o survey gri dabundanc e ( PE, ; basedupo n paire dsurveys ) an

do f survey perio dt o yearl y entrainment

(f t ; basedupo

n weekly subsamples) , fo

r brow n roc k crab
. PE, fro

mth e tw o year s sample drange dfro

maminimu

mo f zero t o amaximu

mo f 0.0254±0.021 9 (±]SE(PE,)) i n Octobe r 1997
. Becaus e estimate dpe r perio dsurviva

l i s weightedto for

ma n annua l mortalit y estimate , th e larges t

value s o f f, (an do f associate dPE, ) have the larges t effect s o n th e estimat

e (July an dJun e 1998)
. N o larva

e wer e collecte da

t either th e DCP P intak e or th e stud y gri dwhe n bot h PE, an dth e annua

l proportio n of

larva e hatche d(f

f ) i n the rt h surve y perio dwer

e equa l t o zero (Septembe

r 1998 , Februar

y 1999 , an dMarc h 1999)
. Whe

n PE, = 0 an

d^>0 , larva

e wer e collecte da

t th e DCP P intak e during th e survey perio dbu t no t during the entrainment

survey paire dwit h th e 72-h r stud y gridsurvey . Lo

w value s o f

f i indicat e period s ofth e yea

r whe n brow n roc k cra b megalop s ar

e leas t abundan t i n weekly entrainmen

t subsamples
. Whil e Jun e an d July 199 8 entrainment

fraction s wer

e highes t overall , Ma

y an dJun e 199 8 densitie s wer

e highes t i n th e stud y gri d(Figure 5.2.1-2)
. TENER A E9-055. 0 5-3 0 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 5 5.2. 1 Cancer

Crab s
Tota l annua l entrainment

mortalit y fro mth e ETM

i s estimate da s P K1 = 0.000018 6 fo r th e perio d Jul y l , 1997 throug h Jun e 30 , 199 8 an dT M = 0.00014 6 fo

r th e perio dJul y l , 199 8 throug h Jun e 30 , 199 9 wit

h associate dstandar

derror s o f SE(P M )= 0.232 7 an

d0.0325 , respectivel y (Figure 5.2.1-3) . Th e sensitivit

y analysi s consider s th e effect o f varyin g value s o f

P s on th e outcome o f th e ETM calculation s shown i

n Figure 5.2.1- 3 fo

r th e tw o periods
. The value s o f P M resultin g fro mcalculation s usin g onl y th e alongshor e displacement

wer e higher (0.0056 3 and0.00652 ) tha n thos e reporte dfo

r th e offshor

e extrapolate ddensitie s (0.000018 6 an d0.000146)
. Value s o f p]range dfro

m0.00038 6 t o 0.0023 9 fo

r T M extrapolate doffshor

e an drange dfro

m0.1 1 t o 0.1 3 fo r alongshor e only
. Interpretation

of Assessment

Results Th e ETM estimate o f

entrainment

mortalit y o f megalopae ca

n b e assume dt o apply t o al l stage s o f larva l mortalit y a t DCP P and , by extension , ca

n b e applie dt o th e adult

cra b populatio n o r

t o harves t assumin g n o compensation
. Estimate s o f stock siz e an ddensit y tha t coul db e usedt o conver t P M into a n estimate o f

adul t equivalent

los s (assumin g n o compensator y mortality ) are no t available
. Althoug h P M wa s estimate dusin g bot

h alongshor

e current displacement

an d densit y extrapolatio n offshore , th e estimate usin g alongshor e current s wa s usedi

n assessin g fisher y valu e becaus e i

t wa s mor e representativ e ofth e area s activel y fishedfo r rock crab
. Th e roc k cra b fisher y doe s no t exten dint

o th e offshor

e area s include di

n th e extrapolation
. Brow n rock crab s hav e bot

h commercia

l an drecreationa

l fishery value
. A

n are atha t contain s th e populatio n a

t risk , predicte dby usin g th e averag e alongshor e displacement s o f

14 0 k mt o 16 0 k m (Figur e 5.2.1-3) , i s limite dt o th e regio n wher e crab s ar e landeda t th e port s o f

Morr o Ba y an d Avila
. Fro m197 5 t o 199 8 a

n averag e o f

135,200 k

g o f rock crab s wer e landeda t Morro_Ba y an d Avil a(Figur e 5.2.1-4)
. A

n ex-vesse l pric e o f

$2.3 2 pe r k g an daverag e weigh

t o f 0.3 4 an d0.4 5 k g fo r female s an

dmales , respectively , i s reporte dfo r th e Morr o Ba y are acatch (Debora

h Johnston , Californi aDepartmen t o f Fis h an dGame , pers . comm.)
. Th

e estimate dmortalit

y rate s fro mth e ETM

usin g alongshor

e extensio n (P

M = 0.0056 3 an

d0.00652 ) ar

e applie dt o th e averag e landings
. Assumin g tha t th e proportiona

l effect o f entrainment

mortalit y o n th e larva

l

TENERA E9-055. 0 5-3 1 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 6 5.2. 1 Cancer

Crab s populatio n als o act s o

n th e adult population , the

n the averag e yearly historica l Mon o Ba

y are a catch i s affecte

db y th e sam e proportion , whic

h equate s t o 760 an

d88 0 k g o f crab s fo r the tw o years , respectively
. I

n term s o f monetar y value , th e yearl y valuatio n woul db e $1,76 0 an

d$2,04 0 fo r th e tw o years . The AEL mode l estimate s ar

e assigne dt o population-wide losse s bu t ca n b e comparedt o th e fisher y using th e ex-vessel pric e an daverag e weigh

t o f 0. 4 kg
. Crab s tha

t reach reproductiv e siz e ar e not subject t o fisher y captur e due t o thei r

small size
. Therefore , th e numbe r o f estimate d adult s los t to th e populatio n i s extrapolate dt o fisher y size , an dth e resultin g tw o yearly estimate s o f 23,40 0 an d18,20 0 crab s los t

t o th e populatio n pe

r yr represent $21,70 0 an

d$16,900 , 7 % an

d 5 % o f individual s i

n a n averag e annua

l catch (base do

n a n averag e annua

l catch o f 135,200 k g an d0. 4 k g pe r crab)
. Thes e value s overestimat e fishery losse s sinc e proportiona l reduction s o f number s du e t o catchability , trappin g selectivity , an dfishin g effor

t ar e not considered
. I

n a n experimenta

l trappin g stud

y by Carrol l (1982) , tag return s o n ove r 9,00 0 brow

n roc k cra b alon g th e Diabl o Canyo

n coastlin e average d6.3%
. Further , fewe r tha n 0.1 % ofth e tagge dcrab s wer e recovere di

n th e loca l commercia

l fisher y ove r th e cours e ofth e 5-yea

r study
. Althoug

h there wer e no dataavailabl e o

n commercia

l fishing effor

t durin g tha

t period , aconservativ e estimat e tha t 10 % ofth e fishery-sized crab s i n th e populatio n wer

e actuall y landedpe

r yea r wouldreduc e th e valuatio n ofth e FH

and AEL losse s b y one orde r o f magnitude
. The ETM-based

los s assessment s o f

$1,76 0 to $2,04 0 us e amor e appropriat

e valuatio n metho d becaus e i t consider s catch a s aproportio n ofth e populatio n an di s als o conservativ e becaus e i t i s calculate dusing the large

r value s o f P M (i.e. , base do n a n alongshore-only translatio n ofth e survey gri dnumbers)
. Becaus e ofth e low estimate dpopulatio n mortalit y b y powe r plan t entrainmen

t (alongshor

e an doffshore-basedP M = 0.000018 6 an

d0.000146) , effects o

n th e brow n roc k cra b populatio n ar

e probably low
.

TENER A E9-055. 0 5-3 2 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 7 5.2. 1 Cancer

Crab s 

### 5.2.1. 2 Slende r cra b (Cancer gracilis)

Cancergracilis Dan a 1852 ; slende r crab ; carapace widt h t o 11. 5 cm (4. 5 in) ; Princ e Willia m Sound , Alask a t o Bahi a Play a Maria , Mexico ; lo w intertida l t o 14 3 m (47 0 ft); carapac e purpl e wit h whit e edging ; claw s wit h whit e tips , leg s purple (Jense n 1995) .
Th e slende r cra

b i s commonl y foun d o n mu d flats an d i n bed s o f eelgras s although iti s usuall y no tfoun d intertida

l ly sout h o f centra l Californi a (Morri s e tal . 1980) . Althoug h seasonall y found i n bays , th e slende r cra

b doe s no ttolerate brackis h conditions . Slende r crab s can extrud e betwee n approximatel y 143,00 0 an d 1,000,00 0 egg s per batc h (Hine s 1991 ; Tabl e 5.2.1-5) . Females , o n average , produce a singl e batc h per yr . Tota

l lifetim e spawnin g occur s ove r a maximum o f thre e season s an

d more commonl y onl y tw o (Orensan z an d Gallucc i 1988) . I

n Elkhor n Slough , matin g i s commo n i

n November , an

d ovigerou s female s wer e note d i n July an d Augus t(Morri s e tal . 1980) . Farthe

r north , i n Puge tSound , animal s hel d i n th e laborator

y bore egg s fro

m Decembe r t o April , an d a fe w female s produce d a smal l secon d batch . Graha m (1989 ) recorde d bot

h sprin g an d fal l spawnin g period s i n Montere y Bay . Larva l developmen ti

n th e slende r cra

b wa s describe d by All y (1975) . Egg s hatc h int o pre-zoe a larvae , whic h quickl y mol tt o firststag e zoea . Averag e larva l developmen ttim e (fro

m hatchin g through completio n ofth e megalop s stage ) wa s 48. 9 d a t1 7 °C , wit

h mos tstage s lastin g approximatel y on e wee k (Tabl e 5.2.1-6) . Durin g thei r planktoni c existence , cra b larvae ca

n becom e widel y distribute d i n nearshore waters . I n a stud y i

n Monterey Bay , Graha

m (1989 ) found tha

tslende r cra

b stag e 1 zoea e wer e very abundan tclos e t o shor e (withi n 6 km ) during Marc h an d April . Durin g a

n autum n spawnin g perio d i n August , he found stag e 1 zoea e concentrate d approximatel y 1 1 k m fro m shore . Later
TENER A E9-055. 0 5-3 3 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 1 Cancer Crab s stag e larvae , includin g megalopae , wer e foun dfurthe r fro mshor e durin g all time s ofth e year . Thi s offshor

e larva l distribution , comparedt o th e nearshor e distributio n o f

brown rock

crab , reflect s th e fact

tha t adult slende r crab s ar e widely distribute di

n coasta l shel f areas , furthe

r offshor e tha n brow n roc k crabs
. Th e megalop s larva

e an d juvenil e crab s ar

e frequently foun

d crawlin g unharme do

n an dunde r th e bells , an

deve n i n th e stomachs , o f

large r jellyfishes , especially Pelagia colorata (Moni s et al
. 1980)
. Ther e ar e n o publishe destimate s o f larva l mortalit y i n slende r crab , excep t

fo r i n laborator

y cultur e (All y 1975)
. Fro

mDecembe

r 199 6 unti l July 1997 , megalopa e o f C
. gracilis wer

e mor e abundan t tha n al l zoe astage s 2- 5 i

n th e entrainment

subsamples , indicatin g tha t man y ofth e developin g megalopae wer e bein g transporte dbac

k towar dshore
. However , slender

cra b megalopa e ar e les s abundan

t clos e t o shor

e tha n brow n roc k cra b (Graha m1989)
. A s aresult , i

t i s difficul t t o estimate slende

r cra b larva l surviva l fro mentrainmen

t sampling
. Therefore , dat afro m th e abundanc e o f

stag e 1 zoea

e an do f megalopa e fo r brow n roc k cra b i n th e DCP P entrainmen

t wer e usedt o estimate th e larva l mortalit y o f slende r crab
. A n instantaneou s larva

l mortalit y o f 0.158/d , estimate dfo

r anothe r species , th e brow

n roc k crab , an ddescribe di

n Sectio n 5.2.1.1 , wa s applie dfo

r estimatin g the numbe

r o f female s tha

t producedthe entraine dslender crab
. Basedo n fieldgrowt

h studies , i

t wa s estimate dtha

t slende r crab s matureda

t a n ag e o f abou t 1 0 month s post-settlement

to asiz e o f

approximately 6 0 m

mcarapac e widt

h (Orensan z an

dGallucc i 1988)
. Growt

h occur s through 11-1 2 instars , wit h crab s attainin g a

n estimate dmaximu

mag e of 4 y r post-settlement
. Summary

of Field Collections Cancer gracilis zoe awer

e removedfro

msubsample s collecte da

t the DCP P intak e structur e fro m Decembe r 199 6 through Jun e 1998 , whil e megalop s wer e remove dfo r th e perio dOctobe

r 199 6 through June 1999
. Zoe awer e removedonl

y fro msom e ofth e subsample s collecte ddurin g tw o gri dsurvey s i

n 1998
. Megalop s wer

e removedfro

msubsample s fro

mth e stud

y gri dfro mJuly 199 7 unti l Jun e 1999
. Estimate ddensit y (number s pe

r volum e o f wate r filtered) o f

zoe aan d megalop s fro

mthe processe dsubsample s ar e presente di

n Appendi

x H . The estimate dweekl

y
TENER A E9-055. 0 5-3 4 , Fina l 316(b ) Demonstratio n Marc h 1,200 0P.4 9 5.2. 1 Cancer

Crab s numbe r o f zoe aandmegalop s entraine d(Appendix I ) wa s calculate db y multiplyin g th e estimate dlarva

l densit y b y th e volum

e o f water draw n throug h th e CWS
. Zoe aabundanc e wa s greates t i n th e sprin g althoug h zoe a1 bega n t o appea r i n th e entrainment

subsample s durin g th e winter month s (Figur e 5.2.1-5) . Megalop s wer e foun dthroughout

th e entire year , wit

h pea k abundance s i

n winter 1996-97 , fal

l 1998 , an dsprin g 1999
. Larva l densitie s wer

e estimate dfro

mbong o net

subsample s collecte da

t th e DCP P intak e structur e between October

199 6 an dJun e 1999
. Fo r

adaily samplin g event

there generall y wer

e 3 2 t o 6 4 subsample s processe dfo r estimatin g megalop s densitie s an deight subsample s processe d fo r countin g zoea . O f

apossibl e 5,52

4 subsample s processe dfo r megalopae , slender

cra b wer e foun di n 59 0 (11%)
. Megalop s densitie s appea r relativel y constant

wit h peak s i n late fal l an d winte r (Figure 5.2.1-5) . O f

63 6 subsample s processe dfo r zoea , th e frequencie s o f

subsample s b

y stag e wer e 83 % zoe a1,6 % zoe a2,3 % zoe a3 , 1 % zoe a4 , an dn o zoe a5
. Megalop s densitie s i

n th e DCP P offshor e stud y gri dwer e highes t i n Ma y an dJun e 199 8 an

d frequently encountere da

t al l other times , especiall y Jul y 1997 , Apri l 1998 , Augus t 1998 , Septembe r 1998 , March 1999 , an

dMa y 199 9 (Figur e 5.2.1-6) . Ther e wer e 3,16 8 bong o ne

t subsample s processe dfo

r megalops , o f

which 15 % containe dslende r cra b megalops
. Estimating

Total Annual Entrainment A s previousl y mentioned , estimate s o f entrainment

o f zoe a1 ofth e tax abrown rock crab , yello w crab , an dslender cra b wer e combine dbecaus e o f

uncertaintie s i

n identification
. Th e proportion s o f slender cra b zoe astag e 1 wer

e derive dby usin g th e proportion s o f slender cra b i n zoe astag e 2 tha t coul db e identifie dt o species
. Estimate s o f

annua l entrainment

(E T ) ofth e five zoe aan

done megalop s stage s o f

brown rock cra b durin g th e tw o analysi s period s (Decembe r 1 , 1996-Novembe

r 30 , 1997 an

dJul y 1 , 1997

- Jun e 30 , 1998 ) ar

e presente di

n Tabl e 5.2.1-7 . The dat

e ofth e first

analysi s perio dfo

r zoe awa s adjuste dfro

mOctobe r 199 6 through Septembe

r 1997 to Decembe

r 199 6 through November

199 7 becaus e th e entrainment

subsample s collecte ddurin g Octobe r an dNovembe

r 199 6 wer e not

TENER A E9-055. 0 5-3 5 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.5 0 5.2. 1 Cancer

Crab s
processedfo

r zoea . Generally ther

e wer e fewe r individual s o f

eac h olde r zoe astage , although no zoe astag e 4 wer

e collecte ddurin g 1997 i

n Analysi s Perio d1 , an

dn o zoe astag e 5 wer

e collecte d i n eithe r period
. Although zoe aabundanc e overall wa s estimate dto b e les s i n 199 7 durin g Analysi s Perio d1 , th e estimat e o f megalop s abundanc e (E T

= 20,300,000 ) wa s greate

r tha n 199 8 durin g Analysi s Perio d3 (E T = 4,870,000)
. Th

e estimate s o f

annually-entraine dslende

r roc k cra b wer e not adjustedt o along-ter

maverag e becaus e cra

b larva e wer e no t enumeratedi

n th e Intak e Cove surfac e plankto n to w samples
. Fecundity

Hindcasting

(FH j A n instantaneou s dail y mortalit y rate , -0.158 , calculate dfo r brow n roc k cra b i s use dfo r slende r crab
. Estimate dsurviva

l through larva

l stage s ca n then b e calculate da s S larmt =e ( ~ 0l58) ' , wher

e / i s reporte di

n Tabl e 5.2.1- 6 a s mea

n cumulativ e duration
. Surviva l estimate s to stag e midpoin t wer e 1 ) 2 ) 3 ) 4 ) 5 ) zoe a 1 zoe a 2 zoe a 3 zoe a 4 zoe a 5 0.58 4

0.37 5 0.06 3 0.022 2 0.007 7 6 ) megalop s 0.0014
. The FH approach combine s larva

l entrainmen

t losse s wit h surviva l an dadult fecundit y t o hindcas t the number s o f

adult female s effectivel

y removedfro

mthe reproductively activ e population
. Mea

n annua l fecundity , using datathrough ag e thre e (Table 5.2.1-5) , wa s estimate d a s 555,58 3 eggs . The numbe r of reproductiv e year s wa s estimate db y halving the rang e betwee

n ag e o f maturit y o f 1 y r an dassumedeffective longevit y o f 3 yr (supporte db

y linea r survivorship mode l fo r adults)
. Coefficient s o f

variatio n of

survival , fecundity , an

dage s o f maturatio n an

d longevit y ar e no t wel l know n an dare , therefore , reasonably assumedto b e 100% wit

h a lognorma l eno r structure .

TENER A E9-055. 0 5-3 6 Fina l 316(b ) Demonstratio n Marc h 1 , 200 0P.5 1 5.2. 1 Cancer

Crab s
Th e numbe

r o f femal e slender

crab s estimate dt o produc e th e entraine dlarva e wa s calculate dfo

r th e five zoe aan

don e megalop s stag e fo

r th e tw o periods
. All larva

l stage s wer

e hindcast , an

dth e estimate dnumber s o f

female s an

dvariance s o f

estimate s wer

e adde dt o comput

e a n estimate o f total numbe

r o f slender cra b female s an

dth e varianc e ofth e estimate
. The estimate dFH fo r zoe aan dmegalop s stage s fo

r th e perio dDecembe

r 1 , 199 6 throug h Novembe r 30,199 7 fro

m Tabl e 5.2.1- 7 wer

e FH

l = 53 8 female s wit

h SE(FHi ) = 1,150 FHi = 22 0 female s wit

h SE(FH

2 ) = 56 3 FH 3 = 22 1 female s wit

h SE(FH* ) = 52 8 FH< = 143 female s wit

h SE(FHr) = 39 2 FHMegs = 26,20 0 female s wit h fk(FH

Me g s)= 55,50 0 N o slende r cra b zoe astag e 5 wer

e collecte ddurin g thi s period
. The tota l estimate dnumbe

r o f breedin g female s neede dt o produce , th e tota l numbe r o f larvae entraine dwa s calculate db y summin g th e FH

overal l stages : FH

= 27,30 0 females ,

. . I 3
_, _- 2 wit h SE(FH)= l^SE, [FH,) = 55,500
. A n approximat

e 90 % confidenc e interva

l fo r FH, basedo n alognorma

l erro r structure , i s estimate da s 95 9 t o 776,00 0 females
. Th e estimate dFH

fo r slender cra b zoe aan dmegalop s stage s fo

r th e perio dJuly 1 , 1997 throug h Jun e 30 , 199 8 fro

mTabl e 5.2.1- 7 wer

e FH> =1,48 0 female s wit

h SE(FHx ) = 3,18 0 FHz = 46 9 female s wit

h SE(FH

2 ) = 1,05 0 FH 3 = 72 9 female s wit

h SE(FH

i )= 1,670 FHMegs = 6,27 0 female s wit h SE(FH

Megs)= 13,300 N o slende r cra b zoe astag e 4 or

5 wer e collecte ddurin g thi s period
. Th e tota l estimate dnumbe

r o f breedin g female s neede dt o produc e th e tota l numbe r o f larva e entraine ddurin g thi s perio d wa s calculate db

y summin g th e stag e specifi c estimate s a s TENER A E9-055. 0 5-3 7 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.5 2 5.2. 1 Cancer

Crab s
FH = 8,95 0 female s wit h SE(FH)=JfcsEi (FH, ) * = 1-3,800
. A n approximat

e 90 % confidenc e interva

l fo r FH, Y i"\ base do n alognorma

l erro r structure , i s estimate da s 70 3 t o 114,000 females
. Sensitivity Analysi s I n additio n t o calculatin g aconfidenc e interval , asensitivit y analysi s (Tabl e 5.2.1-7 ) fo r al l larva l stage s wa s perfonned , i

n which FH

wa s recomputedb

y varyin g th e input

paramete r o f estimate dannua

l entrainment , E T

, by ±1.645S£l£ 7 . J an

dsurvival , S, by usin g amultiplicativ e erro r structur e (i.e
. Se ' ' ') an

dusin g CKI.S ) = 1.

0
. The rang e o f

surviva l estimate s fo

r all stage s producedth e sam

e relativ e change s i

n FH, a s expecte dbasedupo n aconstan

t multiplier
. However , FH

wa s les s sensitiv e t o entrainmen t tha n surviva l variation
. Thi s differenc e wa s especiall y pronouncedfo

r th e zoe a1 an

dmegalop s stage s an

dca n b e explaine dby th e us e o f samplin g varianc e fo

r estimatin g entrainmen

t variability , wit

h CVs o f les s tha n 100%
. Therefore , improvemen

t i n th e precisio n o f

FH ca n result fro mimprovedestimate s ofth e larva l stages ' survival
. Adult Equivalent

Loss (AEL j The AEL approach use s estimate s ofth e abundanc e of entraine dorganism s to project the los s o f equivalent number s o f

adult s basedo

n mortalit y schedule s an

dag e a t recruitment
. Surviva

l rate s fro mentrainment

of megalopa e t o recruitmen

t int o fishery ar

e not available
. However , assuming a50:5 0 sex ratio , AEL

an dFH ca n b e compareda s AEL

= 2FH = 54,60 0 an

d17,90 0 adults , wit h a n associate dstandar

deno r o f SE(AEl) = 2SE(FH) = 111,000 an d27,700
. 5.2.1.2e Empirical

Transport

Model (ETM ; Th e ETM assessmen t require s estimate s o f

larva l stag e duratio n an

dlarva l densit y i n entrainmen

t an dgri dsubsamples
. Th

e cra b dat awer e collecte dfo

r onl y th e megalop s larva

l stag e i n the gri d subsample s an

dwill b e compare dt o megalop s stag e larva e i n th e entrainment

subsamples
.

TENER A E9-055. 0 5-3 8 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.5 3 5.2. 1 Cancer

Crabs
Tw o entrainment

mortalit y estimate s ar

e presented : fo

r Jul y I , 1997 throug h Jun e 30 , 199 8 an d fo r Jul y 1 , 199 8 throug h Jun e 30 , 1999
. Slende r cra b megalop s larva

e ma y b e susceptibl e to entrainment

b y th e powe

r plan t fo r approximatel y 4 2 d , basedo n th e averag e estimate dlarva l duratio n (All y 1975)
. Almough th e duratio n i s mor e tha n one month , each monthl y survey perio d wil l b e assume dt o represent discrete group s o f

larvae , permittin g tw o independent weighte d estimate s o f

tota l entrainment

mortalit y fro m24 subsamples
. Tota

l annua l entrainment

mortalit y ( P M ) i s estimate dfro

mth e value s o f

PE, and/

fo r each survey perio d(Tabl e 5.2.1-8) , based o n larva l densitie s fro

mentrainment

(Figur e 5.2.1-5 ) an

dgri dsurvey s (Figur e 5.2.1-6) . Th e proportio n ofth e populatio n withi n th e nearshor e stud y gri dwa s base do

n alinea r extrapolatio n o f

densitie s i

n th e gri di

n th e offshor

e directio n an

ddisplacement

i n th e alongshor

e direction
. Monthl y estimate s o f proportiona

l entrainment

(PE, ) fo r slender cra b i n each rt h survey fro mth e tw o year s sample drange dfro maminimu

mo f zero t o amaximumo f 0.859±0.91 1 (± 1 SE(PE,}) i n Augus t 199 7 (Tabl e 5.2.1-8) . Period s whe n bot h PE, an dth e annua l proportio n o f

larva e hatche di

n th e rt h survey perio d(f t) wer e equa l t o zer o (Decembe

r 1997 an dJanuar y 1998 ) indicat

e tha t n o larvae wer

e collecte da

t either th e DCP P intak e or th e stud y grid
. Whe

n PE, = 0 an

df t >0, larvae wer

e collecte da

t th e DCP P intak e durin g th e survey perio dbu t no t durin g th e entrainment

survey paire dwit

h th e 72-hou

r stud y gri dsurvey . Low value s o f f. indicat e period s ofth e yea

r whe n slender cra b megalop s ar

e leas t abundant i n weekl y entrainment

subsamples
. Jun e 199 8 an dOctobe r 199 8 wer e highes t fo r th e tw o annua

l periods
. Ma

y an dJun e 199 8 densitie s wer

e highes t i n th e stud y gri ddurin g th e first

period , an d Augus t an dSeptembe

r 199 8 wer e highes t i n th e secondperio d(Figure 5.2.1-6)
. Tota l annua l entrainment

mortalit y fro mth e ETM

i s estimate da s P

M = 0.010 7 fo

r th e perio dJuly 1 , 1997 throug h Jun e 30 , 199 8 andP^= 0.00078 4 fo r th e perio dJul y 1 , 199 8 throug h Jun e 30 , 199 9 wit h associate dstandar

derror s o f

SE(P M ) 0.051 5 an

d0.0373 , respectivel y (Figur e 5.2.1 - 7)
. Th e sensitivit

y analysis , which consider s th e effect of varyin g value s o f

P s o n th e outcome o f th e ETM calculations , i s show

n i n Figur e 5.2.1-7
. The value s o f P M resultin g fro

mcalculation s usin g only th e alongshore displacement wer e highe r (bot h years/ ^ = 0.09 ) tha

n thos e reporte d

TENER A E9-055. 0 5-3 9 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 1 Cancer Crab s fo r th e offshor

e extrapolate ddensitie s (0.010 7 an d0.000784)
. Value s of

P s rangedfro

m0.0042 2 t o 0.0087 5 fo

r P M extrapolate doffshor

e an d0.12 5 fo r bot h year s using alongshor

e only
. ! Interpretation

of Assessment

Results Interpretatio n o f

assessmen

t result s fo r slende r crab s i s limitedb

y the absenc e o f

an y information o n populatio n size
. The ETM estimate s o f

1.07 % an d0
. 0784 % probabl

y represen t low populatio n impacts
. Value s o f P s tha t wer e calculate dbase

do n extrapolatio n offshor

e wer e als o large r tha n fo r brow n crabs
. A s aresult

(comparin g \IP S

), the population o f

slende r cra b a t ris k proportiona

l t o th e stud

y gri dwa s estimate dt o b e approximately 5-1 0 time s smaller tha n th e populatio n o f

brow n rock crab s relativ e t o th e stud

y grid
. However , value s o f

\IP S are nearl y th e sam e fo r bot h slende r andbrown roc

k crabs , fro mth e calculatio n using alongshor e current s only
. Ther e i s no fisher

y valu e fo r th e estimate s o f

slende r cra b adult equivalen t los s (54,60 0 an

d 17,90 0 crabs)
.

TENER A E9-055. 0 5-4 0 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.5 5 5.2. 1 Cancer

Crab s
Tabl e 5.2.1-1 . Schedul e o f estimate dfecundit

y b y ag e fo r brown roc

k cra b (Cancer antennarius; fro

mCarrol l 198 2 an

dHine s 1991)
. Ag e (yr post settlement) 1. 5 2 • 3 4 5 6 Estimate d

carapac e widt

h (mm) 6 2 8 3 10 5 123 13 5 143 Estimate d

no . egg s pe

r batch 156,400 513,10 0 1,401,80 0 2,664,70 0 3,994,60 0 5,004,00 0 Number o f Batche s 1. 0 1. 5 1. 5 1.5 1. 5 1.5

TENER A E9-055. 0 5-4 1 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 1 Cancer Crab s

Tabl e 5.2.1-2
. Brow n roc k cra b (Cancer

antennarius): Annua l estimate dnumbe r o f zoea e an d megalopa e entrained , estimate dFH, an dsensitivit y o f zoea - an dmegalops-base dFH estimate s fo r tw o analysi s periods
. Sensitivit y estimate s recalculate dfo r mode l parameter s (9) o f entrainmen t

(^±1.645-5£(^)) , an dsurviva l (^e ±1645rn * ) wher e CK(^ ) = 1.0)
. T T =estimate d
annua l #cra b larva e entraine d(b y stage) , FH= numbe r o f adul t femal e crabs , an dS= finit e survivorship
.

a ) Analysi s Perio d1 (dat e adjusted) : Decembe r 1 , 1996-Novembe r

30 , 199 7 Sensitivit y Analysi s Parameters o f Recalculate

dFH

—' _,— . E T ET

S Stag e T J y ' +1.645S£(0 ) -\.MSSE(8) x " LafVa l % TE(t T ) FH

TE[FH) +|JMJ L -

__., MJfl , „ _.,«„.,, „ Zoea l 17,400,000,000 3.940,000,00 0 17,50 0 39,00 0 24,00 0 Zoe a2 4,580,000,00 0 3,410,000,00 0 16,30 0 38,10 0 36,20 0 Zoe a3 4,720.000,00 0 4,370,000,00 0 43,30 0 104,000 109.000 Zoe a4 665,000,00 0 572.000.00 0 15,70 0 37,40 0 38,00 0 Zoe a5 3,480,00 0 4,140,00 0 24 9 62 6 73 5 Megalop s 56,500,00 0 4.480,00 0 24,10 0 53,400 27,20 0 11,00 0 0 0 0 0 20.90 0 3.37 0

3,14 0 8,35 0 3,04 0 4 8 4,65 0 90,60 0

84,40 0 224,00 0 81,50 0 1,29 0 125,00 0 TOTA L ]1, V)i-\ C: \ C

,-. - - 117,00

0 b ) Analysi s Perio d3 : Jul y 1 , 1997-Jun e 30 , 199 8 Sensitivit y Analysi s Parameters of RecalculatedFH LatvalStag e %£ ( £ } FH ffl(ffi) ^£ ^ ^J^J ^ K(6) -1.64 5 SE(0) *e Zoe a 1 18.500,000,00 0 6.260.000,00 0 18,60 0 41,70 0 28,90 0 8.27 0 3.59 0 96.40 0 Zoe a 2 3,770.000,00 0 1,900.000.00 0 13,40 0 30,50 0 24.50 0 2,31 0 2.59 0 69,40 0 Zoe a 3 2.420.000.00 0 1.760.000,00 0 22,10 0 51,70 0 48,70 0 0 4.28 0 115.00 0 Zoe a 4 781.000.00 0 910.000,00 0 18,50 0 46.30 0 53,90 0 0 3,57 0 95.70 0 Zoe a 5 111.000.00 0 135.000.00 0 7,95 0 20,10 0 23.80 0 0 1.53 0 41.20 0 Megalop s 24.500.00 0 2.200.00 0 10.40 0 23,10 0 12.00

0 8,88 0 2,01 0 54.00 0 TOTA L ? 5// t ? f

r 4t » ;( y p 91.00 0

TENER A E9-055. 0 5-4 2 Fina l 316(b ) Demonstratio n Marc h 1,200 0

'____. !P.5 7 5.2. 1 Cancer

Crab s Tabl e 5.2.1-3
. Duratio n o f laboratory-reare dzoe astage s ( @ 13.8°C ) of
. brow n rock cra b (Cancer

antennarius; Roesijad

i 1976 ) an

dmegalop s stag e duratio n from
. Ally (1975)
. Mea n cumulativ e duratio n i s cumulativ e duratio n minu s hal f o f th e stag e duration
. Stag e Mea n Duratio n Cumulativ e Cumulativ e Larva l Stag e (d ) duratio n duratio n Zoe a1 Zoe a2 Zoe a3 Zoe a4 Zoe a5 Megalop s Tota l 1 0

6 6 6 8 14. 6 50. 6 1 0

1 6 2 2 2 8 3 6 50. 6 5

1 3 1 9 2 5 3 2 43. 3

TENER A E9-055. 0 5-4 3 Fina l 316(b) Demonstratio n Marc h 1,200 0P.5 8 5.2. 1 Cancer

Crab s
Tabl e 5.2.1-4
. Brow

n roc k cra b (Cancer

antennarius): Monthl

y estimate s o f

proportiona

l entrainment

(PE,) an

d annua l proportio n o f

larva e hatche d i

n th e /t h survey perio d (f t) an d associate d standar

d enor s (SE) use

d i n estimatin g entrainment mortalit y fo r tw o analysi s periods , a ) Analysi s Perio d 3 : July 1 , 1997-Jun e 30 , .199 8 Surve y Start

Dat e Ju l 21 , Au g 25 , Se p 29 , Oc t 20 , No v 17 , De c 10 , Ja n 22 , Fe b 26 , Ma r 18 , Ap r 15 , Ma y 18 , Ju n 8 , 199 7 199 7 199 7 199 7 199 7 199 7 199 8 199 8 199 8 199 8 199 8 199 8 PE,

0 0 0 0.025 4 0.022 4 0 0 0 0 0.0024 8 0.00026 0 0.000890 b ) Analysi s Perio d 4 : Jul y 1 , 1998

- Surve y Start

Dat e Ju l 21 , Au g 26 , Se p 16 , Oc t 6 , No v 11 , De c 9 , Ja n 12 , Fe b 3 , Ma r 17 , Ap r 14 , Ma y 24 , Ju n 23 , 199 8 199 8 199 8 199 8 199 8 199 8 199 9 199 9 199 9 199 9 199 9 199 9 PE,

0.0011 4 0 0 0.0080 7 0.0064 4 0.010 8 0 0 0 0 0 0.00082 0 SE(PE,)

0 0 0 0.021 9 0.031 3 0 0 0 0 0.0014 6 0.000070 0 0.00039 0 -Jun e 30 , 199 9 SE(PE,) 0.0011 7 0 0 0.0090 3 0.0072 3 0.0091 7 0 0 0 0 0 0.00052 0 0.0060 0

0.0058 6 0.0016 9 0.012 7 0.0016 3 0.0010 6 0.0037 0 0.0020 1 0.0025 1 0.052 8 0.28 9 0.62 1

fi 0.65 0 0.013 2 0 0.030 2 0.015 6 0.027 4 0.017 9 0 0 0.021 2 0.17 1 0.053 2 SE(f,)

0.0013 4 0.0016 7 0.00064 0 0.0020 6 0.00062 0 0.00047 0 0.0010 3 0.00066 0 0.00083 0 0.0050 4 0.015 7 0.016 2

SE(fi) .0.023 2 0.0038 4 0 0.0063 7 0.0043 5 0.0058 2 0.0048 3 0 0 0.0053 5 0.016 4 0.0096 3

TENER A E9-055. 0 5-4 4 Fina l 316(b ) Demonstratio n Marc h 1.200 0P.5 9 5.2. 1 Cancer

Crab s
Tabl e 5.2.1-5 . Schedul e o f estimate dfecundit

y b y ag e fo r slende r cra b (Cancer gracilis) (fro

mOrensan z an

dGallucc i 1988 ; Hine s 1991)
. Ag e (yr post settlement ) 1. 5 2 3 4 Estimate dcarapac e

widt h (mm) 4 7 6 2 7 7 8 6 Estimate d

no . egg s pe

r batch 143,800 342,40 0 672,90 0 953,40 0 Number o f Batche s 1. 0 1. 5 1. 5 1. 0

Tabl e 5.2.1-6 . Duratio n o f planktoni c zoe aan

dmegalop s stage s o f

slender cra b (Cancer gracilis) reare di

n th e laborator

y (All y 1975)
. Mea n Lowe

r Uppe r Mea

n Larva l Stag e duratio n limi t (d ) limit

(d ) Cumulativ e Cumulativ e (d ) duratio n duratio n Zoe a1 Zoe a2 Zoe a3 Zoe a4 Zoe a5 Megalop s Tota l 6. 8

7. 2 7. 0 6. 2 7. 1 14. 6 48. 9 5

5 5 5 6 1 2 3 8 1 1

1 2 1 0 8 8 1 7 6 6 6. 8

14. 0 21. 0 27. 2 43. 3 48. 9 3. 4

6. 2 17. 5 24. 1 30. 8 41. 6

TENERA E9-055. 0 5-4 5 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 1 CancerCrab s

Tabl e 5.2.1-7 . Slende

r cra b (Cancer

gracilis): Annua

l estimate d numbe

r o f zoea e an d megalopa

e entrained , estimate d FH, an d sensitivit

y o f zoea- an d megalops-base d FH

estimate s fo

r tw o analysi s periods
. Sensitivit y estimate s recalculate d fo r mode l parameter s (0) o f

entrainmen

t (^ ± 1.645-5£(t9)) , an

d surviva l (t9e ±1645cM ) wher

e Cv(o} = \.0). E~ T

= estimate d #cra

b larva e entraine d (b y stage) , FH= numbe r of adult female crabs , an

d S = finit e survivorship
. a ) Analysi s Perio d 1 (date adjusted) : Decembe r 1 , 1996-November30 , 199 7

Larva l Stag e Zoe a1 Zoe a2 Zoe a3 Zoe a4 Zoe a5 Megalop s TOTA L %

175,000.00 0 46,000.00 0 7,740,00 0 1,770,00 0 0 20,300,00 0 iso.^H SE(E 7 ) 39,600,00 0 65,600,00 0 8,510,00 0 3,040,00 0 0 1,140,00 0 FH

53 8 22 0 22 1 14 3 0 26,20 0 27.30 0 SE(FH)

1,15 0 56 3 52 8 39 2 55,50 0 Sensitivit y Analysi s Parameter s o f Recalculate d fi.
+I.645S£(0 ) 73 9 73 7 62 1 54 9 0 28,60 0 -\ .64$SK(9)

33 8 0 0 0 0 23,70 0 5

104 4 3 4 3 2 8 0 5.05 0 S

-i.Msn-|» i 2,79 0 1,14 0 1,15 0 74 2 0 136.00 0

b ) Analysi s Perio d 3 : Jul y 1 , 1997-Jun e 30 , 199 8

Larva l Stag e Zoe a1 Zoe a2 Zoe a3 Zoe a4 Zoe a5 Megalop s TOTA L ET

480.000.00 0 97.700,00 0 25,500,00 0

0 0 4.870.00 0 tt><A '0* 7 SE(l%)

162,000,00 0 67,200.00 0 21,800.00 0

0 0 633.00 0 FH

1,48 0 46 9 72 9 0

. 0 6.27 0 8.95 0 SE(FH)

3.18 0 1,05 0 1,67 0

13,30 0 Sensitivit y Analysi s Parameter s o f Recalculate d fv % +1.645££(6 ) 2.30 0 99 9 1,76 0 0 0 7.61 0 E T

S

~ - „.t.645(V.<i > -\M5SK(0) * * 65 8 0 0 1 2 4.93 0 28 6

9 0 14 1 0 0 1.21 0 S

7.67 0 2.43 0 3,78 0 0 0 32.50 0

TENER A E9-055. 0 5-4 6 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.6 1 5.2. 1 Cancer

Crab s
Tabl e 5.2.1-8
. Slender

cra b (Cancer gracilis): Monthly estimate s o f proportiona

l entrainment

(PE,) and annua

l proportio n o f

larvae hatche d i

n th e rt h survey perio d (fj) an d associate d standar

d error s (SE) use

d i n estimatin g entrainment

mortalit y fo r tw o analysi s periods , a ) Analysi s Perio d 3 : Jul y 1,1997-Jun e 30 , 199 8 Surve y Star t Dat e Jul 21 , Aug 25 , Se p 29 , Oct 20 , No v 17 , De c 10 , Ja n 22 , Fe b 26 , Ma r 18 , Ap r 15 , Ma y 18 , Ju n 8 , b ) Analysi s 199 7

199 7 199 7 199 7 199 7 199 7 199 8 199 8 199 8 199 8 199 8 199 8 PE,

0 0.85 9 0 0.023 0 0.0010 2 0 0

. 0 0 0.00086 0 0.00035 0 0.00019 0 SE(PE,)

0 0.91 1 0 0.013 7 0.00105

- 0 0 0 0 0.00089 0 0.00013 0 0.00014 0 Perio d 4 : Jul y 1 , 1998-Jun e 30,199 9 Surve y Star t Dat e Ju l 21 , Au g 26 , Se p 16 , Oc t 6 , No v 11 , De c 9 , Ja n 12 , Fe b 3 , Ma r 17 , Ap r 14 , Ma y 24 , Jun 23 , 199 8 199 8 199 8 199 8 199 8 199 8 199 9 199 9 199 9 199 9 199 9 199 9 PE,

0 0.00031 0 0.00091 0 0.0043 9 0.00090 0 0.0043 2 0.0049 0 0 0.00067 0 0 0.0010 6 0.0027 8 SE(PE,)

0 0.00031 0 0.00067 0 0.0028 8 0.00091 0 0.0033 4 0.0055 7 0 0.00049 0 0 0.00077 0 0.0015 3 /

0.060 2 0.072 6 0.075 4 0.096 1 0.0644 0 0 0.00068 0 0.0042 2 0.144 0.15 1 0.33 2

0.044 2 0.050 8 0.026 7 0.30 2 0.24 2 0.053 5 0.022 6 0.0092 3 0.043 4 0.086 9 0.085 9 0.032 5 

### SE(f,)

0.0096 9 0.013 1 0.015 8 0.011 4 0.0097 4 0 0 0.00068 0 0.0017 3 0.015 2 0.016 0 0.025 9


### SE(f.) 0.0067 5 0.0059 1 0.0047 1

. 0.023 1 0.019 3 0.0060 9 0.0043 3 0.0026 1 0.0056 7 0.014 1 0.008 3 0.0048 8

TENERA E9-055. 0 5-4 7 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.6 2
5.2. 1 Cancer

Crab s

*•"•» » U J C O T — + r > E % Of </ ) C O J O c ra <i ) 2 110 - 100 - 9 0 - 8 0 - 7 0 " 6 0 -

- 5 0 - 4 0 - 3 0 -

- 2 0 i o - o J.I : Brow n roc k cra b (C
. antennarius)

- Zoe a I



### UL.. . i n IIIIIIIIMIIII I i n i i IIIIIIII|NII|I I IIII I III I l l iiii|iiii)iii i II I M I 111 1 IIIIII I II I m i III I 1 1 IIIII I i III I III I II I 111111 1 | O I N | D | J FMAM J I J ASOND J FMAM J J ASO N llllllll|lll | D J F M | A

199 9 II I II I IIII I M J

• designate s surve

y wit h densit

y - 0 Surve y Dat e

g0mm ^ U J C O
, — + F % > rrr' > . If) c O J Q c ra 0 ) 5 120 - 110 - 100 - 9 0 ~ 8 0 - 7 0 " 6 0 - so 4 0 - 3 0 - 20 " 10 " o - 1 t ,, ' •!- * Brow n roc k cra b (C
. antennarius)

- Zoe a I I

.I. J I I 1 1 I I 111111 1 I M 1111111111 1 I I 1 1 i n 111111 1 I I 1 1 I I 111111 1 i u 1111111111 1 ia 1111111111 1 N I 1 1 I I 111111 1 N I 111111 1 I I 1 1 M I 11 1 u n I o I NI D | j |F|M|A|M|J[ J A|S|O|N|D| J I FIMI A I M | J | J | A I S| O | N iiiiiiiiini i D J F |

1 1 ni l i il l nil-il l M | A | M | J I 19S 6 J Surve y Dat e T designate s surve

y wit h densit

y - 0 Figure 5.2.1-1 . Weekl

y mea n zoea e an dmegalop s larva

l densit y (#/m 3 + 1 S.E. ) a

t th e DCP P intake
. Y-axi s scal e varie s betwee n graphs
. Zoe ano

t sorte dfro mJul y 199 8 through June 199 9 samples
. TENER A E9-055. 0 5-4 8 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.6 3
5.2. 1 Cancer

Crab s

U J c o E

C O c O J Q c ra O J 14 0 1 3 0 120 - 1 1 0 100 - 9 0 - 8 0 7 0 - 6 0 ~ 5 0 4 0 3 0 " 2 0 1 0 0 Brow n roc k cra b (C
. antennarius) - Zoe a II I

f""""i»"*""i"nfifmiiinfnif?mnfi ? i mi f O N D J |III|UIIIMI|IIII|MI| I

FMAM J i J y I II I 1111111 1 < 1 1 II I 11111111111IJI11 1 > 1111J1 1 II I 11 1 jIAISOND J F M A| M J J IIIII1 1 II I 11I I A S O llllllllllllllllllll l M A M J

• designate s survey wit h density « • 0 Surve y Dat e

3 0 "

U J C O ^ » + 20 " E

C O c O J D c ra O J 2 Brow n roc k cra b (C
. antennarius) - Zoe a I V

nmmmi m tmrnrmiifimmfmrmmmiM n i mnr n rtt ' • i III P II I [ II I IIIIII I ••ifiiiwiriTTii i iiit i II I IIBJ I i| i IIIII I it i II I fi i IIIII I i|i i > • II I uitii p i i >T

i irjiiiiiai i •_••• ! IIII I riiifaiiiTVJ i • |i> i • • >>ijriiii i ira i 1 1 II I | o | N | D | J | FIM|A|M|jI j |A|S|O|N|D| J | F|M I AIM| J | J I A | S j O | N|D| J |F|M|A|M|J |

• designate s surve y wit h densit y ~o Surve y Dat e Figure 5.2.1- 1 (continued) . Weekl y mea n zoea e an dmegalop s larva

l densit y (#/m3 + 1 S.E. ) a t the DCP P intake
. Y-axi s scal e varie s betwee n graphs
. Zoe anot

sorte dfro mJuly 199 8 throug h Jun e 1999 samples
. TENER A E9-055. 0 5-4 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0,£,6 4
5.2. 1 Cancer

Crab s

4 —

**~r. U J C O 3 ~ V + E
. &Dens
c ra , - O J 1

0 -

T

0.8 - 0.7 - ^ - K U J C O 0.6 - ^ + n O. S - E
c 0 ) 0.3 - Q I 0.2 - 2 0. 1 -
0.0 - Brow n roc k

cra b (C
. antennarius)

- Zoe a V

miitiiiiimi 11 *iiim*iiiiitiiwiiiiiiiiiintiitimrMTi 1 mrm i 1 r t m I 0 | N |0| J |F|M|A|M|J|J|A|S|O|N|O|J|F|M|A[M|J|J|A|S|O|N|D|J|F|M|A|M|J | | 199 6 | 199 7 | 199 8 | 199 9 | Surve y Dat e designate s surve

y wit h densit

y = 0

..L.ul.il.tll....i l Brow n roc k cra b (C
. antennarius)

- Megalop s

| 

# l l l l 1 ''Wv.S.mn-Wn'mSt'm'm.J" ' 

## 1,1 ,



# lil l i 

# ll —"f t ni'i " I'I I ' m Amtmn'mii ' t |0|N|o!j[F|MlA|M|jlj|A|s!o|N|D|j|F|M|A|M|j|j|A|s|o|N|D|j|F|M|AiM|j | | 199 6 ; 199 7 | '99 8 j 199 9 | Surve y Dat e V designate s surve y wit h densit y = 0 Figure 5.2.1- 1 (continued) . Weekl y mea n zoea e an dmegalop s larva

l densit y (#/m 3 + 1 S.E. ) a

t th e DCP P intake
. Y-axi s scal e varie s betwee n graphs
. Zoe anot

sorte dfro mJul y 199 8 through June 1999 samples
. TENER A E9-055. 0 5-5 0 Fina l 316(b ) Demonstratio n Marc h 1 , 200 0m

z m m C O 6 O l O l

c n i t n

- n 5 ' 92 . c o .____ . a. 

### 2 ° 0 ) ( D 

# i l
-7 tfl I O O i o = o o O 3 Brow n roc k

cra b megalop s (Cancer antennarius)

C O 

# E 2. 1

1. 8 1. 5 1. 2 0. 9 0. 6 0. 3 0. 0

Dept h Contour s 2 0 meter s ^ —4 0 meter s • ^ —6 0 meter s Poin t Bucho n

DCP P Intak

e

Poin t Sa n Lui s

Jul . 21 , 9 7 Aug . 25,'9 7 Sep . 29,'9 7 Oct . 20,'9 7 Nov . 17,'9 7 Dec . 10,'9 7

S tFigur e 5.2. 1 -2a
. Mean larva l density (#/m 3 ) collecte din th e DCP P stud y gri dcell s an dat th e entrainmen t

samplin g location
.m

z m 

## £ m C O I o t n c n

t n • t n i o

C J o > 2 O
3 " O 3 C O K > Q ) o cr . o o O 3 Brow n roc k

cra b megalop s (Cancer antennarius)

C O 

# E 2. 1

1.8 1. 5 1. 2 0. 9 0. 6 0. 3 0. 0

Dept h Contour

s
—»•= - 2 0 meter s

— —4 0 meter s ^^

— 6 0 meter s Poin t Bucho n

DCP P Intak

e

Poin t Sa n Lui s

Jan . 22 , '9 8 Feb . 26 , '9 8 Mar . 18 , '9 8 Apr . 15 , '9 8 Ma y 18 , "9 8 Jun . 8 , "9 8 Figur e 5.2.1-2 b (continued) . Mea n larva l density (#/m 3 ) collecte di n th e DCP P study gri dcell s an da t th e entrainmen t

samplin g location
.m

z m m 

# s t n t n

t n • t n w

3 0 ) O J .____ . O ) 2 a 

# s i _** > N > i B o =r . o o o 3 Brow n roc k cra b megalop s (Cancer antennarius)

C O 

# E 2. 1 1. 8 1. 5 1. 2 0. 9 0. 6 0. 3 0. 0

Dept h Contour

s

. i 2 0 meter

s ^ —4 0 meter

s
••• • 6 0 meter

s Poin t Bucho n

DCP P Intak

e

Poin t San Lui s

Jul
. 20,'9 8 Aug
. 25,'9 8 Sep
. 15,'9 8 Oct
. 5,'9 8 No v10 , *9 8 Dec
. 8 , '9 8 

### Figur e 5.2.1-2c (continued) . Mea n larva l densit y (tf/m 1 

### ) collectedi

n th e DCP P stud y grid cell s an

d a t the entrainmen

t sampling location
. U l r o 

## i7 3 O C B

- 1 O 2 C O

O )

^ 1m

z m 

### £ m C O o t n t n <___ >

t n 

# s

91 t o

__ _ O ) 

### 2 ° 

# i l

- * tf)

- ^ * M 3 o a-, o o o 3 0 ) Brow n roc k cra b megalop s (Cancer antennarius)

C O

# E 2. 1

1. 8 1. 5 1. 2 0. 9 0. 6 0. 3 0. 0

Dept h Contour s

— « — 2 0 meter s

— — • 4 0 meter s
^ ^ TM 6 0 meter s Poin t Bucho n

DCP P Intak

e

Poin t San Lui s

Jan
. 11 , '9 9 Feb
. 2
. '9 9 Mar
. 16 , '9 9 Apr
. 13 , "9 9 Ma y 23 , '9 9 Ju n 22 , '9 9 Figur e 5.2.1-2 d (continued) . Mea n larva l densit y (fl/m 1 ) collecte di

n th e DCP P study gri dcell s an da t th e entrainmen t

samplin g location
. u V )

•JP.6 9
5.2. 1 Cance r Crab s
Brow n roc k

cra b (Cancer

antennarius)

- duratio n t o megalop s stag e

P s alongahor e Analysi s Perio d 3 : Ju l 1997-Ju n 199 8 Densit y Extrapolate

d Ps of f scal e VPs = 2,59 1 Pu- 0.000018 6 ±

0.038 4 Estimat e 90 % Cl .

O x O k m S x 10 x lO x 20 x 2S x 30 x 3S x 40 x

B 7 k m 17 4 k m 26 1 K m 34 7 k m 43 4 k m B2 1 k m 60 S k m SS S k m

Siz e o f Populatio n Relativ e t o Stud y Oli d Eq.ulvala_.n t Distanc e Alongshor v Brow n roc k

cra b (Cancer

antennarius)

- duratio n t o megalop s stag e Analysi s Perio

d 4 : Ju l 1998-Ju n 199 9 Densit y Extrapolate

d Ps of f scal e 1/Ps = 41 8 Pu = 0.00014 6 ±0.053 5

Estimat e

—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—.—i—i— r O x S x 10 x IS x 20 x 2S x SO x 3S x 40 x O k m 8 7 k m 17 4 k m 28 1 k m 34 7 k m 43 4 k m S2 1 k m SO S K m 60 S K m Siz a o f Populatio n Relativ e t o Stud y Ort d Equivalen t Distanc e Alongshor e Figur e 5.2.1-3 . Tota

l annua l entrainmentmortalit

y (P u ) an d 90 % confidenc e interva l (CI. ) a s a functio n ofth e reciprocal ofth e fraction ofth e populatio n a tris k an d containe d i n th e stud y gri d (P s ) use d t o approximat

e th e alongshor e exten tofth e study gri d populatio n expande d o n m e basi s o f alongshor e curren

tmovement s and th e offshor e extrapolatio n o f study gri d abundance extende d alongshor e usin g bot h onshor e an

d alongshor e curren

tmovement s wit h 90 % C.I.' s indicated . TENER A E9-055. 0 5-6 5 Fina l 316(b ) Demonstratio n Marc h 1.200 0P.7 0 5.2. 1 Cance r Crab s

25 0

u-><or^<so)OT-tNco3tfttor*-eoo > r^^^^^floconcococDCDaoflO " at Clo U> O) O. <ft CT> C- <J) O) CT> Oi Qi <7i 01010>0)>OiO)0>0>0>0 ) Figure 5.2.1-4 . Roc

k cra b (Cancer

spp. ) landing s (MT ) a

t Morr o Ba y an dPor t Sa n Lui s between th e year s 1975-199 8 (source : CDF&G database)
.

TENER A E9-055. 0 5-5 6 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.7 1
5.2. 1 Cancer

Crab s

^ u i C O T - + n E $ , *-" * & C O c C V O c C O C D 5

"•— * u i C O • ^ + I O E % '^rr _> . '5 5 c C D Q c CT J C D 2 3 -

-

2 ~

1 ~

O - Slende rcra b (C
. gracilis) - Zoe a I



## jJill i 

# l l ii,.._xJ U 

# i 

# i

|O|N|0|J|F|M|A|M|J|J|A|S|O|N|D|J|F|M|A|M|j|j|A|S|O|N|0| J | 199 6 | 199 7 | 199 8 | Surve v Dat e • designate s survey wit h density « 0

1.4 " 1.3 " 1.2 " 1. 1 " 1.0 - 0.9 - 0.8 " 0.7 - 0.6 " 0.5 - 0.4 - 0.3 ~ 0.2 - 0. 1 - 0.0 " •
II'IIIIIIIII' I Slende rcra b (C
. gracilis)-Zoea I I

' i H I n i i iiiiimmimnn'iniii'ii i i mim i ,,! • I I I M| M 1 I I 1 1 II I 1 II I Ni l I I 1 IIIIIII I H 1 II I II I M l H I III I I N 1 1 I I M III I IIIIIII I Mi l 1 IH N Mi l I I 1 M UII H 1 III I II I I I II I I I Mil l I I 1 M |O|N|D|J|F|M|A|M|J|J|A|S|O|N|D|J|F|M|A|M|J|J|A|S|O|N| O | 199 6 | 199 7 | 199 8 Surve y Dat e • designate s surve y wit h densit y = 0 |F|M|A|M]j | 199 9 |

II I II I II I IIIII I II I l l II I nil ] J|F|MIA|M|J | 199 9
Figur e 5.2.1-5 . Weekl

y mea n zoeae an

dmegalop s larva

l densit y (#/m3 + 1 S.E. ) a

t the DCP P intake
. Y-axi s scal e varie s between graphs
. Zoe anot sorte dfro mJul y 199 8 throug h Jun e 199 9 samples
. TENER A E9-O55. 0 5-5 7 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.7 2 r-tft - y 5.2. 1 Cancer Crab s

U J C O * - + 7, h * >» C O r C D O c C O C D > 0.3 B 0.3 6 0.3 4 0.3 2 0.3 0 0.2 8 0.2 6 0.2 4 0.2 2 0.2 0 0.1 8 0.1 6 0.1 4 0.1 2 0.1 0 0.0 8 0.0 6 0.0 4 0.0 2 0.0 0 Slende rcra b (C
. gracilis) - Zoe a I

minimu m n

m ..ll lllll|MMIIII|llll|lll|MIBIII||| | |O|N|0 | J |F|M|A|M |

n tmmmiimiiinnnimiti n i mimi ri i n

II I Mil l 11 1 M1 1 8 O ••• ' Min i

D | J F | M IIMIIIIIfMM|IMI|i|llll|IIMM ]

|M|J|J|A|S|O | IIIIIIMIIIMIH.I I I ! I I I D | J I F I M | A I

• designate s surve y wit h densit

y = 0 Surve y Dat e

u i c o T - + EDensityMean 0.1 0
0.0 9
O.O S
0.0 7
0.0 6
0.0 5
0.0 4
0.0 3
0.0 2
0.0 1
0.0 0 Slende rcra b (C
. gracilis) -Zoe a I V

miiimimm m

m nmiiimiiiimmnnniiniiii i i min i nmtit i 

### vrv. .1 1 MI|.M,U,li,ll.,lllll L M|l l IIIIIIII ! O | N I D j J j F ! M j A I M [ J ! j A !SiO!N|D ! J F I M | A i M | J J !A|S:O!N|DI J |F | i 199 6 199 7 | 199 8 \ M i A | M | J I 199 9 I V designate s surve y wit h densit

y - 0 Surve y Dat e Figure 5.2.1- 5 (continued) . Weekl y mea n zoea e an dmegalop s larva

l densit y (#/m ' + 1 S.E. ) a

t th e DCP P intake
. Y-axi s scal e varie s betwee n graphs
. Zoe ano

t sortedfro mJul y 199 8 through June 1999 samples
. TENER A E9-055. 0 5-5 8 Fina l 316(b ) Demonstratio n Marc h 1.200 05.2. 1 Cancer Crab s

U J CO E

C O c C D a c r o ( D 5 Slende rcra b (C
. gracilis) - Zoe a V

o - mnnnmiimnnmmmnmmiimmmmiimni i i mimi wnim i 1 1 Mil l ll | I I I II I I ' lllll j I IIIII I II I II I I lllllllllll l I I I I II I IIIIII I Illllllll l Mi l |H | II I I 111111111111 1 I I II I I I , r- i r •'. ' i • i M|lll|MIIFIII| ! ll|MMIIIM|lll|MM! i ioiNID I J I F|M|A| M j j| j |A|S|O|N|O| J | F|M|A|M| J [ J |A|S|O|N|D| J |F|M|AJM|J | | 199 6 j 199 7 j 199 8 j 199 9 I

• designate s survey wit h densit y - 0 Surve y Dat e

0.0 9

0.0 7 0.0 6 11 1 C O + E

• = 0.0 4 c C D o c C D C D 0.0 3 0.0 2 0.0 1 Slende rcra b (C. gracilis) - Megalop s



# J t

I I Mil'I I IIIIII . l'l|l!llllll|MM|lll|||:,i[i.'|'i,|ll... ! | | ,i | ll. l U l III ] llfl l ITI|llllV!IIIIITIIll11llliai l llfTL^I ] II I • ! I I IS l I I (II I I ' 1 1 Mil . i o , N j D I J ( FIM!AIMI j | j IAISIO!NID; J |FIM|A|M| J | J |A|S|O{N|0| J FI M | A Surve y Dat e
• designate s surve y wit h densit

y = 0 Figur e 5.2.1- 5 (continued) . Weekl y mea n zoeae an

dmegalop s larva

l densit y (#/m3 + 1 S.E. ) a

t th e DCP P intake
. Y-axi s scal e varie s betwee n graphs
. Zoe anot

sorte dfro mJul y 199 8 through June 199 9 samples
. X !

TENER A E9-055. 0 5-5 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0m

z m m C O i 

### o y i O l b

CJ l i a. o

3 S L w

.____ . 

### . 2 1 5

_ £ C 3 

# § 1 r * c o r o 5 o s- . o o o 3 Slende rcra b megalop s (Cancer gracilis)

C O

# E 0.6 3 0.54 0.45 0.3 6 0.2 7 0.1 8 0.0 9 0.0 0

Depth Contour s
m • " 2 0 meter s ttemmm. 4 0 meter s ^

—6 0 meter s Poin t Bucho n

DCP P Intak e

Poin t Sa n Lui s

Jul
. 21,'9 7 Aug . 25,'9 7 Sep . 29,'9 7 Oct. 20, '9 7 Nov . 17, '9 7 Dec . 10, '9 7
Figur e 5.2.1-6a
. Mea n larva l densit y (#/W ) collecte di n th e DCP P stud y gri dcell s an da t th e entrainmen t

samplin g location
.m

z m 

## £ m C D i o O l O l

O l I O )

3 92 . W a> "e x 

### 2 ° § |

- k ( 0 M 3 o A o o O 3 Slende rcra b megalop s (Cancer gracilis)

C O 0.6 3 0.5 4 0.4 5 0.3 6 0.27 0.1 8 0.0 9 0.0 0

Dept h Contour s

•• —- 2 0 meter s

— —4 0 meter s ••"• • 6 0 meter s Poin t Bucho n

DCPP Intak

e

Poin t Sa n Lui s

Jan . 22 , '9 8 Feb . 26 , '9 8 Mar . 18 , '9 8 Apr . 15 , '9 8 Ma y 18 , '9 8 Jun . 8 , '9 8


### Figur e 5.2.1-6b (continued)
. Mea n larva l densit y (#/m 5 

### ) collectedi

n th e DCP P stud y grid cell s an

d a t the entrainmen

t sampling location
. u 

### c r vtm

z m m c o 6 O l O l b

0 1 i C D r o

3 !!__ . w .___ . at ,c r 

# § 1
r o 5 5 O CT. O O O 3 Slende r cra b megalop s (Cancer gracilis)

C O 

# E 0.6 3 0.5 4 0.4 5 0.3 6 0.2 7 0.1 8 0.0 9 0.0 0

Dept h Contour s

— —2 0 meter

s

— » 40 meter

s

— ^ 6 0 meter

s Poin t Bucho n

DCP P Intak e

Poin t Sa n Lui s

Jul . 20,'9 8 Aug . 25,'9 8 Sep . 15,'9 8 Oct . 5,'9 8 No v 10,'9 8 De c 8 , 9 8 

### Figur e 5.2.1-6c (continued)
. Mea n larva l densit y (#/m 3 

### ) collectedi

n th e DCP P stud y grid cell s an

da t the entrainmen

t samplin g location
. 0 1 c rm

z m m C D • o O l O l

O l I 0 >

3 82 . c o .« * a> "e x 2 O •_ * tn u #r. 

### §- ! 1 7 3

- i W IS ) 0 1 O S f O O O 3 Slende rcra b megalop s (Cancer gracilis)

C O 

# E 0.6 3 0.5 4 0.4 5 0.3 6 0.2 7 0.1 8 0.0 9 0.0 0

Dept h Contour

s

' 20 meter

s 4 0 meter s
• — • 6 0 meter

s Poin t Bucho n

DCP P Intak e

Poin t Sa n Lui s

Jan
. 11,'9 9 Feb . 2 , '9 9 Mar . 16,'9 9 Apr . 13,'9 9 Ma y 23,'9 9 Ju n 22,'9 9 

### i » Figur

e 5.2. 1 -6d (continued)
. Mea n larva l densit y (#/m 1 

### ) collectedi

n the DCP P stud y gri dcell s an

d a t the entrainmen

t sampling location
. 0) cr . to5.2. 1 CancerCrab s
Slende r cra b (Cancergracilis) - duratio n t o megalop s stag e 0.32 0 - 0.28 8 - 0.26 8 - 0.22 4 — 0.102 - £ O.IO O \ R B alonoshoi e Analysi s Perio d 3 : Ju l 1997-Ju n 199 8 Densit y Extrapolate

d Ps of f scal e 1/P s = 23 7 Pu-- 0.0107 ±0.084 3

O xS x10 xie x20 X 2S xSO x3S x40 x O k m 8 7 k m 17 4 k m 261k m 34 7 k m 43 4 k m 62 1 k m BO B k m 68 6 k m Siz e o f Populatio n Rotativ e t o Stud y Orl d Equivalen t Distanc e Alongahor a Slende r cra b (Cancer

gracilis) - duratio n t o megalop s stag e Analysi s Perio

d 4 : Ju l 1998-Ju n 199 9 Densit y Extrapolate

d Ps of f scal e MPs = 114 Pu-- 0.000784 ±0.062 1

Estimat e 90 % Cl .

O x S x lO x 16 x 20 x 26 x SO x 3S x 4 O x O k m 8 7 k m 17 4 k m 26 1 k m 34 7 k m 43 4 k m S2 1 k m SO S k m 69 6 k m Siz e o f Populatio n Relativ e t o Stud y Orl d Equivalen t Distanc e Alongahor a Figur e 5.2.1-7 . Tota

l annua l entrainmen

tmortalit y (P M ) an d 90 % confidenc e interva l (CI. ) a s a functio n ofth e reciprocal ofth e fraction ofth e populatio n a trisk an d containe d i n th e study gri d (P,) use d t o approximat e th e alongshor e exten tofth e study gri d populatio n expande d o n th e basi s o f alongshor e curren

tmovements an

d th e offshor e extrapolatio n o f study gri d abundance extende d alongshor e usin g bot h onshor e an

d alongshor e curren

tmovements wit h 90 % CI.' s indicated . TENERA E9-055. 0 5-64 Fina l 316(b ) Demonstratio n Marc h 1.200 0P.7 9



# Blan k Pag eP.8 0 

# r
. F - T 5.2. 2 Pacifi c Sardin e



### 5.2.2 Assessment

of Pacific Sardine (Sardinop s sagax)

Sardinops sagax

(Jenyn s 1842) ; Pacific sardine ; lengt h to 4 1 c mbu t usually les s tha n 3 0 cm ; Kamchatka , Russi ato southeas t Alask aan dGuaymas , Mexic o to Per u an dChile ; school s ove

r continenta

l shelf , ofte n nea r shor e (Eschmeye

r et al
. 1983)
. Blue-green above , whit e below , serie s o f

black spot s o n bac k (Mille r an dLe a1972)
. Pacifi c sardine i s amembe r ofth e famil

y Clupeida

e (herrings) , whic

h i s als o represente di

n th e water s aroundDiabl o Canyon by America n sha d(Alosa sapidissima), Pacifi c herrin g (Clupea pallasi), threadfin sha

d(Dorosoma pelenense), an droundherrin g (Etrumeus teres). The shar p declin e ofth e Pacifi c sardin e populatio n i n th e mid-1940' s le

dt o th e demis e ofth e world' s larges t commercia

l fisher y an dt o th e establishment

ofth e Californi aCooperativ e Oceani c Fisherie s Investigation s (CalCOFI ) progra m(originall y namedth e Cooperativ e Sardine Research Program) i

n 194 7 (Mose r 1996)
. Recently , th e Californi aDepartmen t o f Fish an dGam e (CDF&G ) issue dapres s releas e (Januar y 15,1999 ) indicatin g tha

t th e Pacifi c sardine resourc e ha s no w full y recovered
. Thei

r mos t recen t stoc k assessmen

t indicate dth e catch quotab e increase dfro

mth e 199 8 quotao f

43,57 4 metri c ton s (MT ) to a199 9 harves t o f 120,55 6 MT (Hil l et al
. i n press)
. Pacifi c sardin e larva e wer e not among th e te

n mos t abundan t larva l fis h tax a collecte di n the DCP P study , bu

t ar e aspecie s o f

interes t becaus e o f

their recover y status , thei r recen t inclusion i

n th e Fisher

y Managemen

t Pla n fo r Coasta l Pelagi c Specie s (PFMC 1998) , an d their potentially growin g fishery
. Pacifi c sardin e spawn pelagi c egg s an dlarva e yea r roundwit h afall/winte

r minimu man da spring/summe

r maximu m(Mose r 1996) primarily sout

h o f Poin t Conception to th e sout

h o f Sa n Dieg o (Har

t 1973)
. Reproductio n i s temperatur e dependent , an

dth e spawnin g biomas s ma y mov e nort h durin g E

l Nin o years . Ag e a

t maturit y als o ma y b e temperatur

e dependent , wit

h 50 % o f female s maturin g a

t about 1 6 c mstandar dlengt h (SL ) i n souther n Californi a(Macewic z e t

al
. TENER A E9-055. 0 5-6 5 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.8 1 5.2. 2 Pacifi c Sardin e 1996 ) an d50 % ofth e female s maturin g a t about 1 3 c mof f Ensenada , Baj aCaliforni aNorte , Mexic o i n 195 8 durin g a

n E l Nin o yea r (Ahlstro m1960)
. Relativel y larg e proportion s offis h a t ag e clas s 0-y

r hav e reache dmaturit

y i n bot h th e Souther

n Californi aBigh

t an dMonterey Ba

y (Tabl e 5.2.2-1 ; Deris o e

t al
. 1996)
. Estimate s fro

mpreviou s studie s o f

sardin e fecundit

y rang e widely
. Har

t (1973 ) estimate d 30,000-65,00 0 eggs/batc h wit h larg e individual s producin g 200,00 0 eggs/yr
. Fitch an d Lavenber g (1971 ) reporte da

n estimate o f

sardin e fecundit

y o f 90,000-200,00 0 eggs/yr
. L o e t al
. (1996 ) estimate da

n averag e batch fecundit

y o f 24,28 2 (CV=11%)
. Th e highes t estimate s o f annua l fecundit y fro mButler e t al
. (1993 ) indicat

e tha t Pacifi c sardin e fecundit

y range dfro

m 146,75 4 eggs/two-yr-ol d femal e t o a s man y a s 2,156,60 0 egg s fo

r ten-y r an dolder female s (Tabl e 5.2.2-2) . Fitch an

dLavenberg (1971 ) indicate dtha t Pacifi c sardin e ca

n liv e t o 2 5 yr , bu

t longevit y i s mor e likely about

1 3 y r accordin g t o Butler

e t al
. (1993) ; however , Lee

t e t al
. (1992 ) indicate dtha

t Pacifi c sardin e older

tha n five year s wer

e seldomencountere di

n th e fishery ; thi s wa s supporte db

y datao n catch-at-ag e presente di

n Hill e t al
. (in press)
. Each yea r sardine s migrate northwar dearl y i n summe r an dretur n sout h i n fall , migratin g farthe

r wit h eac h yea

r o f life
. Th e timin g an

dextent o f thes e migration s are comple x an dma y b e affecte dby oceanographi c conditions
. Ag e stratificatio n ofth e adul t populatio n doe s appea

r t o occur over alatitudina

l gradient , wit

h th e larger , olde

r fish occurrin g farthe

r nort h (Har t 1973)
. Th e adul t populatio n of

f th e centra l coas t o f Californi agenerally consist s o f youn g adult s (2

- 4 yr ) tha t hav e migrate dfro

mth e primar

y spawnin g ground s i

n souther n Californi at o feeding ground s i n th e water s nea

r Diabl o Canyon (PFM C 1998)
. Ag e an dgrowt h characteristic s o f

Pacifi c sardin e a

t al l lif e stage s hav e bee

n wel l described
. Larva l growt h estimate dfro

motolith s ha s bee

n measuredi

n severa l temperature regime s (Miller 1952) , fro mwhich we ar

e abl e to deriv e a

n approximat

e growt h rat e fo r larva e collecte di

n th e DCP P study
. Growt

h ofth e adult s ha s been describe dwit h avon Bertalanff

y growt h function (VBGF : L„=205. 4 m

m± 1.6 m mSE , k=1.1 9 ± 0.0

4 SE , to = 0 ) b

y Butler et al
. (1996)
.

TENER A E9-055. 0 5-6 6 Fina l 316(b ) Demonstratio n Marc h 1.200 0P.8 2 5.2. 2 Pacifi c Sardin e
Pacifi c sardine ar

e amon g th e fe w fishes wit h age - an d stage-specifi c mortalit

y estimate s fro

m th e eg g stag e throug

h later lif e stage s reported i

n th e scientifi c literature . Instantaneou s eg g mortalit y ha s bee n estimate d a s 0.13/ d of f o f Orego n wit

h a CV=243 % (Barne s e tal . 1992) . L o e tal . (1996 ) produce d a simila r estimate o f embryoni c (yolk-sac ) mortalit y o f 0.12/d , bu

twit h a CV=97% . Butle r e tal . (1993 ) modele d th e demography o f Pacifi c sardine fro

m th e eg g stag e throug h th e lat e adul tstage s wit

h estimate s o f

instantaneou s dail y natura l mortality , th e estimate d duration o f

eac h stage , an

d dail y fecundity . Deris o e tal . (1996 ) modele d th e annua l fishin g mortalit y o f Pacifi c sardin e fo r th e year s 1983-199 5 (Tabl e 5.2.2-3).Th e natura l adul tmortalit

y rat e in fished population s ha s bee n assume d t o b e 0.4/y r (Murph y 1966 ; MacCal l 1979) . A recen tstoc k assessmen to f Pacifi c sardin e incorporated fishery harves tstatistic s collecte d through 199 8 (Hil l e tal . in press) . The y indicate tha tin 199 8 th e ex-vesse l revenu e ofth e commercia ] sardin e fishery (i.e. , wetfish ) in th e stat e o f Californi a totale d $3. 5 million , whic h i s dow n fro m th e $4. 1 millio n generate d in 1997 . Directe d fisher y harvests in souther

n an d centra l Californi a ar

e mostl y canne d fo r huma n consumptio n an

d sol d overseas , wit

h a smal l proportion sol d fres h fo r huma

n consumptio n o r anima

l foo d (PFM C 1998) . Th e ex-vesse l pric e fo r sardine s i n th e wetfis h fishery ranged fro m $55-9 1 per MT , averagin g $73.70/M T fo r Januar y throug h Septembe r o f

1998 . I n additio n t o th e wetfis h fishery, a smal l liv e bai tfishery exist s tha

tusuall y take s <4,54 0 MT/yr . Th e overal l revenu e generate d b y th e liv e baitfishery exceed s tha tofth e directe d fishery becaus e ofth e highe r dolla r valu e fo r liv e bait, averagin g $817/M T i n 1998 . 

### 5.2.2. 1 Summar

y o f Fiel d Collection s Pacifi c sardin e larvae wer e presentintermittentl y i n th e entrainmen

tsubsample s durin g th e year s 1997-199 9 (Appendi x H) , wit h thei r greates tabundance occurrin g during March-May , 199 8 (Figur e 5.2.2-1) . Ther

e wa s a tota

l o f 2,19 1 larva

l Pacifi c sardine s i

n 23 0 bong o netsubsample s collecte d a

tth e DCP

P intak e structur e betwee n Octobe r 199 6 an d Jun e 1999 , representin g 5 % o f th e subsample s collecte d an d processe d fro

m th e samplin g location s i n fron tofth e DCP

P intake structure . A n E

l Nin o even tbega

n during th e sprin g o f

1997 , influencin g oceanographi c condition s alon g th e Californi a coas ti n th e fall/winte r seaso n o f 1997-9 8 (Lyn n e tal . 1998 ;
TENER A E9-055. 0 5-6 7 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.8 3 5.2. 2 Pacifi c Sardin e NOA A 1999) , andcorrespond s wit h di e observe dpea

k i n larva l Pacifi c sardin e abundanc e i n DCP P subsample s collecte di

n 1998
. Th e sprea

do f war mwater durin g th e E

l Nin o ma y hav e shiftedth e sardin e spawnin g biomas s nort h o f thei r primar y spawnin g ground s fro

msout h o f Point Conceptio n i

n th e Souther

n Californi aBigh

t (Har t 1973 ; Hil l e t

al
. i n press ) t o th e vicinit

y o f Diabl o Canyon
. Larva l Pacifi c sardin e occurre di n th e DCP P stud y gri ddurin g February-Jul y 1998 , i n Decembe

r 1998 , andagain durin g April-Jun e 199 9 (Appendix H) , wit h th e highes t

abundanc e occurrin g i

n March andApri l o f

199 8 (Figur e 5.2.2-2)
. Th e pattern s observe di n th e stud y gri dfurthe

r suppor t th e suppositio n tha

t th e 1997-9 8 E

l Nin o ma y hav e displace dth e Pacifi c sardin e spawnin g biomas s center

furthe r nort h tha n it s distributio n i

n acooler water year . Ther

e wa s 5,12 2 larva

l Pacifi c sardine s identifie dfro m36 8 bong o net

subsamples , representin g 12 % ofth e stud y gri dsubsample s collecte dandprocesse dfro mJul y 1997-Jun e 1999
. Standar dlength s o f

al l Pacifi c sardin e larvae collecte da t th e DCP P intak e structure between October 199 6 andJun e 199 9 range dfro maminimumo f

1.5 m mt o amaximu

mo f 2 5 mm , wit

h correspondin g ag e estimate s rangin g from0-9 4 d(Figur e 5.2.2-3) . Th e growt h rate o f larva l Pacifi c sardin e (0.2 4 mm/d ; Miller 1952 ) wa s usedt o estimate age s o f entraine dlarvae
. Th e centra l 98 % o f thi s length-frequenc y distributio n resulte di n minimuman

dmaximu mlength s usedfo r th e analyse s o f

2. 4 m man d19. 1 mm , respectively
. W e assume dtha

t larva e shorter tha n th e minimu

mlengt h ofth e centra

l 98 % ofth e distributio n wer e jus t hatche dand , therefore , ag e 0 d , an dw e calculate destimate dage s fro mthi s point
. However , reporte dhatchin g siz e fo r thi s specie s range s fro

m3.5-3. 8 m

m(Moser 1996) , indicatin g tha

t th e smalles t

larvae observe d represent either natura l variatio n i

n hatch length s within th e populatio n or th e phenomeno n o f shrinkag e followin g preservatio n (Theilacker 1980)
. The possibilit

y remain s tha

t al l larvae fro

m th e observe dminimumlengt h o f 1.5 m mt o th e greates t

reportedhatchin g lengt

h o f 3. 8 m m (Moser 1996 ) coul dhav e jus t

hatched , leadin g t o gros s overestimatio n o f age s fo r all larva e <3. 8 mm . Th e mea

n larva l lengt h i n thi s distributio n wa s 5. 5 m man dapproximatel y 1 3 do f

ag e base d o n aminimu

mlengt h o f 2. 4 mm .

TENERA E9-055. 0 5-6 8 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.8 4 5.2. 2 Pacifi c Sardin e
Mea n length s o f

Pacifi c sardin e larva

e sampleda

t th e DCP P intak e structur e an dfro mth e stud

y gri d(Figure 5.2.2-4 ) wer

e not differen t (Mest : p=0.185) , bu

t the Kolmogorov-Smirno v goodnes s o f fit tes t detecte dasignifican

t differenc e betwee

n th e distribution s ofth e tw o collection s (p=0.003)
. Sinc e mea

n length s wer

e not significantly differen

t betwee n the tw o locations , i

t wa s determine dtha

t th e estimate dmea

n age s wer

e no t significantly differen

t either (about 1 4 d)
. Th e length-frequenc y distribution s o f Pacifi c sardin e larva

e wer e basedo n 15 5 larva

e fro mth e intak

e and2,88 2 larva

e fromth e stud

y gri dmirrorin g thei r

adul t distribution
. It

wa s conclude dfro

m thes e datatha

t th e Pacifi c sardin e larva

e entraine dcam

e fro mth e sam e populatio n availabl e i

n th e stud y grid , but tha t there wa s agreate

r proportio n o f

small individual s presen

t i n th e stud y gri dsubsample s a s compare dwit h th e entrainmen

t subsamples
. 

### 5.2.2. 2 Estimatin g Tota l Annua l Entrainmen t Annua l estimate dnumber s o f

Pacifi c sardin e larva

e entraine da

t DCP P increase db

y greater tha n thre e order s o f

magnitude betwee

n Analysi s Perio d1 (Octobe r 1996-Septembe

r 1997 ; £ > = 368,000 ) an

dAnalysi s Perio d2 (Octobe r 1997-Septembe

r 1998 ; % = 104,000,000 : Tabl e 5.2.2-4) . Estimate s fo r Analysi s Period s 2 and3 (Jul y 1997-Jun e 1998 ) wer e th e same becaus e the y include dth e sam e perio do f

199 8 whe n pea k abundanc e o f

Pacifi c sardin e larva

e occurred
. Mos t

ofth e spawning biomas s o f Pacifi c sardin e i s locatedsout h o f Poin t Conceptio n i n th e SouthemCaliforni aBigh t (Hill et al
. i n press ) durin g non-E

l Nin o years . However , durin g E l Nin o event s (e.g. , fal

l an dwinte r o f 1997-98) , war

mwate r move s u p the Californi acoas t fro m th e sout h (NOA A 1999) , probably carryin g souther n Californi aspawning stock s nort h wit h it
. Thi s appeare dt o b e indicate di n th e water s nea

r Diabl o Canyon b

y th e increas e i

n larva l Pacifi c sardin e abundanc e i

n 1997 an d199 8 durin g Analysi s Perio d2
. Th e estimate s o f

annually entraine dPacifi c sardin e larva e wer e adjusted(Tabl e 5.2.2-5 ) to th e long-ter maverag e Intak

e Cove surfac e plankto n to w inde x (III,) calculate da s th e rati o betwee n th e 9 y r averag e (I) o f

Intak e Cov e samplin g (Figure 5.2.2-5 ) an dth e averag e annua

l index estimate dfromthes e sam

e tow s durin g th e yea

r bein g adjusted(/,)
. Th

e averag e indice s fo

r Analysi s Perio d1 an

dAnalysi s Period s 2 an

d3 wer e O.00 1 an

d0.07 0 larvae/m^ , respectively ,
TENER A E9-055. 0 5-6 9 Fina l 316(b ) Demonstratio n Marc h 1.200 0P.8 5 5.2. 2 Pacifi c Sardin e

an d th e long-ter

m averag e inde x fo r 1990-9 8 wa s 0.015 2 larvae/m^ . Thus , th e ratio s use d t o adjus tth e Analysi s Perio d 1 an d Analysi s Perio d 2 estimate s o f larvae entrained wer e 23. 0 an d 0.217 , respectively . Th e sam e trend s i n overal l abundance a s note d fo r unadjusted entrainment value s ar e apparen ti n th e adjuste d values : larva l Pacifi c sardin e wer e les s abundan ti n Analysi s Perio d 1 (E

Adj

_ T = 8,470,000 ) tha

n i n Analysi s Period s 2 an

d 3 (E AJj

_ T = 22,600,000) . However , th e adjustmentt o th e long-term averag e ha d th e effec to f

reducin g th e differenc e i n abundance betwee n year s fro

m thre e orders o f

magnitud e t o les s tha

n one . Th e adjuste d C V ranged fro m 28 % in Analysi s Perio d 1 , reflectin g th e lo w an d patch y abundanc e durin g th e period , t o 7 % in Analysi s Period s 2 an

d 3 whe n th e larvae wer e found i n greate r abundance an

d wer e more evenl y distributed . 

### 5.2.2. 3 Fecundit

y Hindcastin g (FH) Fecundity hindcastin g requires age-specifi c fecundity (M x ) an d mortalit

y (L x ) t o asses s entrainmenteffects . Butle r e tal . (1993 ) modele d eg g an d larva l survivorshi p o f

Pacifi c sardin e fo r severa l lif

e stage s (Tabl e 5.2.2-2) . Thei r 'best ' estimat e i s derive d b y fitting th e range o f field-estimated mortalitie s t o th e assumptio n o f a stabl e an

d stationar

y population . Instantaneou s mortalit y rate s fro

m Butle r e tal . (1993 ) wer e use d t o describ e survivorshi p o f eg g (0.720) , yolk sa c (0.670) , an

d earl y larva

l stage s (0.242 ) o f

Pacifi c sardine . Applyin g thes e rates ove r thei r respectiv e averag e stag e duration s (Butle r e tal . 1993) , the y can the n b e use d t o estimat e finite survivorshi p fo r eac h developmenta l stage : 0.16 5 (egg) , 0.12 5 (yolk-sac) , an d 0.07 7 (earl y larvae) . Th e survival rat

e fro m eg g stag e t o entrainment(0.002 ) wa s then calculate d from a n averag e ag e a

tentrainmento f

1 6 d , estimate d usin g a growt h rat e o f 0.2 4 mm/

d (Mille r 1952) , an d a n averag e an

d smalles tsiz e a

tentrainmento f

5. 5 m m an d 1. 5 mm , respectively . Th e FH approac h combine s larva

l entrainmentlosse s an

d adul tfecundity t o hindcas tth e numbers o f adul tfemale s effectivel y remove d fro m th e reproductively activ e population . Fo r Pacifi c sardine , there i s substantia l regional variatio n i

n size-at-age , an

d age s generall y increas e fro m nort h t o sout h (Phillip s 1948) . Siz e an d ag e a tmaturit y may declin e wit

h a decreas e i

n biomass , bu tlatitud e an

d temperature ar

e als o importan

t(Butle r 1987) . A tlo w biomas s levels , MacCal l

TENERA E9-055. 0 5-7 0 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.8 6 5.2. 2 Pacifi c Sardin e (1979 ) report s tha

t all 1 y r oldsardine s appea

r to b e reproductively mature , wherea s a t hig h biomas s level s som

e 2 y r oldfish hav e ye

t t o reach maturity
. Butle

r et al
. (1993 ) als o developed model s usin g ag e a

t first maturit y a s 2 yr . Geographi c distribution , however , influencedmaturit y a s Deris o e t

al
. (1996 ) estimate dtha

t 58 % o f ag e 0 sardine s (< 1 yr ) wer e matur e i n Montere y Ba y an d65 % matur

e i n th e Souther

n Californi aBigh

t i n 199 5 (Tabl e 5.2.2-1) . I

n subsequen

t calculations , we will assum e tha t ag e a t first maturit y i s 2 yr a s modeledi

n Butle r e t al
. (1993)
. Pacifi c sardine s ma

y liv e a s long a s 1 3 y r

(Butle r e t al
. 1993 ; Love 1996) , bu

t Deris o et al
. (1996 ) an dHill e t al
. (in press ) repor

t tha t th e oldes t fish i n their sample s fro

mof f th e Californi acoas t wer e aged9 yr . Leet

et al
. (1992 ) report s tha

t fish olde r tha n 5 y r ar e seldomcaugh

t i n th e fishery , an dthi s i s supportedb

y th e catch-at-ag e datareporte di n Hill et al
. (in press ) tha

t extend s throug h Jun e 1998
. Sinc e bot h longevit y an dag e a t maturatio n ar

e biomas s dependen

t (Har t 1973 ) an dlikel y changin g i n thi s recoverin g populatio n (Hil l et al
. i n press) , w e will us e wha

t appear s t o b e th e fishery longevit

y (i.e. , 5 yr ; Lee

t et al
. 1992 ; Hill et

al
. i n press ) t o calculat

e tota l lifetim e fecundit y (TLF). If

5 yr i s a n underestimat

e ofth e actua

l reproductiv e lif

e spa n o f thi s fish, the

n i t represent s a

n assumptio n tha

t reduces th e tota

l lifetim e fecundit y an dthu s ma y overestimat

e the impac t o f entrainment

losse s o n adul t females
. The averag e fecundit y fro mage- 2 to age- 5 modele db y Butle r e t al
. (1993 ) i s 496,01 8 egg s pe r female pe r year . Thi s fecundit

y i s multiplie d by on e hal f

th e differenc e between th e fishery-modified longevit y andag e a

t maturatio n yieldin g 7Z F = 496,018- ( —j = 744,02 7 . The adjustedtota

l larva l entrainmen

t fo r Pacifi c sardine (E Adj

_ T ) wa s use dt o estimat

e th e numbe

r o f breedin g female s neededto produc e th e numbe r o f larva e entraine d(Tabl e 5.2.2-5)
. Th e estimate dnumbe

r o f breedin g female s (FH) whos e fecundit y equal s th e estimate dtota l los s of entraine dlarva

e i s calculate dassumin g ag e o f maturatio n i s 2 yr

an dlongevit y i n th e fishery i s 5 yr (Tabl e 5.2.2-6)
. Th

e numbe r o f adult female s hindcas t

fro mth e larva

e entraine da

t DCP P durin g Analysi s Perio d1 (FH = 3,170 ) wa s les s tha

n one-hal f o f th e adult female s hindcas t durin g Analysi s Period s 2 an d3 (FH = 8,460)
.
TENERA E9-055. 0 5-7 1 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.8 7 5.2. 2 Pacifi c Sardin e Sensitivity Analysi s Tw o parameters , survivorshi p an dfecundity , ha

dth e greates t

leverag e o

n recalculate dvalue s o f FH (Tabl e 5.2.2-7)
. Varyin g either o f thes e tw o parameter s i

n th e model resulte di

n a n FH rang e o f 613-43,80 0 adul t

female s fo

r Analysi s Perio d1 an

dAnalysi s Period s 2 and3 , compare d t o th e origina

l estimate o f

3,170-8,46 0 adult

females
. Maturatio n an

dlongevit y ha dth e next greates t amoun t o f leverag e o

n recalculate dFH. 

### 5.2.2. 5 Adul t Equivalen t Los s (AEL) Simila r t o th e FH

results , estimate s o f

adul t equivalent s los t

(AEL) du e t o larva

l entrainment wer e smaller durin g Analysi s Perio d1 (2,630 ) .tha n durin g Analysi s Period s 2 an d3 (7,000 ) (Tabl e 5.2.2-8) . Th e AEL

o f 2,63 0 adult s predicte dfro

mE Adj . T a t DCP P durin g Analysi s Perio d 1 reflects th e lo w abundanc e o f Pacifi c sardin e larvae durin g thi s period
. A s indicate dfromth e long ter mIntak e Cov e surfac e tows , thes e low abundanc e estimate s represent amor e typical yea

r relative t o th e followin g year s tha t appeare dt o b e influencedb y E l Nin o conditions
. AEL

value s wer e almos t thre e time s higher

durin g Analysi s Period s 2 an d3 (i.e. , 7,00 0 adul t

equivalents ) when spawnin g stock s generall y foun dsout h o f Point Conceptio n wer

e likel y displace d northwar da s war mE l Nin o water s sprea

dup th e Califomi acoast . Sensitivity Analysi s Lat e larva l survivorshi p ha

dth e greates t

leverag e o

n recalculate dvalue s oi AEL (Tabl e 5.2.2-9) . Varyin g thi s parameter

i n th e model resulte di

n a n AEL range s o f 507-36,30 0 adul t

equivalent s fo r Analysi s Perio d1 an

dAnalysi s Period s 2 an

d3 , comparedt o th e origina l estimate o f

2,630

- 7,00 0 adul t

equivalents
. Early juvenil e survivorship ha dth e nex t greates t leverag e o

n AEL, whil e varyin g th e estimate o f

entrainment

di dno t substantiall y chang e th e origina l estimate of

AEL. 

### 5.2.2. 6 Empirica l Transport Mode l (ETM) Monthly estimate s o f

proportiona

l entrainment

(PE,) i n eac h rt h survey fro

mth e tw o year s sample drange dfro

maminimu

mo f zero t o amaximu

mo f 0.859±0.91 1 (±ISE(PE, I ) i n Januar y 199 9 (Tabl e 5.2.2-10) . Whe n bot h PE, andth e annua

l proportio n o f

larva e hatche di

n th e rt h TENER A E9-055. 0 5-7 2 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 2 Pacifi c Sardin e

survey perio d(fj) wer

e equa l to zero , no larva

e wer e collecte da

t eithe r th e DCP P intak e nor fro mth e stud

y grid
. Whe

n PE, = 0 an

df>0, larva

e wer e collecte da

t th e DCP P intak e durin g th e survey perio dbut

no t durin g th e entrainmen

t survey paire dwit

h th e 72-h r stud y gri dsurvey . For Pacific sardine , th e relatively larg e PE, fo r Januar y 199 9 wa s accompanie db y a n / = 1 sinc e thi s wa s th e only mont

h i n whic h Pacific sardine wer

e collecte ddurin g Analysi s Perio d4
. I n addition , ther

e wer e n o Pacifi c sardine larva

e collecte di

n th e stud y griddurin g th e paire d72

- hou r samplin g period
. A PE

wa s calculate dfo

r th e survey perio dbecaus e the larva l densit y from th e weekly entrainment

sampl e (Appendix H ) wa s usedt o estimat e th e densitie s i

n th e unsample d volum

e inshor e ofth e tw o cell s neares t

th e intak e (D l an dEl)
. A s aresult

n o estimate s o f

larva l mortalit y du e to entrainmen

t (P M ) wer e calculate dfo

r Analysi s Perio d4
. B y varyin g th e estimate dproportio n ofth e sardin e populatio n i n th e stud y gri d(P s ) ove

r th e mea n an dmaximu mlarva l durations , estimate s ofP M range dove

r nearly a n orde r o f magnitude durin g Analysi s Perio d3 (Figure 5.2.2-6) . The difference s i n P M resulte dfro

mlonge r larva l duratio n an

dconsequentl y greater

alongshor e an donshor e transpor t durin g th e perio dwhic h decrease dP s , although i

t increase dtime th e larva

e wer e susceptibl e to entrainment
. Th e P M value s calculate dfromoffshor e extrapolate dabundanc e extende dalongshor e wer e small regardles s ofth e larva

l duratio n use

d(i.e. , 0.000066 9 an

d0.00028 4 fo

r the maximu

man dmea n durations , respectively)
. The extrapolation s develope di n thi s analysi s indicatedtha t sardin e larva e wer e a t ris k ove r a n are arangin g fro

m93 8 km ^ t o 14,80 0 km ^ (base do n 1997-199 8 dat a of curren t velocities , gradient s i

n larva l distribution , an

dduration s a

t risk fo r mea n an dmaximu m larva l size s entrained , respectively)
. Thes e area s represen t 0.6-9.1% , respectively , ofth e tota l are aofth e 199 8 spawning populatio n o f Pacific sardin e extendin g fro mSa n Francisc o Ba

y to Ensenada , Mexic o (basedo n value s reporte db

y Hill e t al
. [i n press ] an

dth e PSMF

C database ; Figure 5.2.2-7) . 

### 5.2.2. 7 Interpretatio n o f Assessmen t Result s Estimate s o f

entrainment

losse s using AEL

estimate s ca

n b e use dto estimat

e effects o n loca l harves t o f Pacifi c sardine
. A

n estimate dannua

l averag e equivalen

t los s of approximately 5,000 adult sardine s (AEL) a

t DCP P translate s int

o 0.62 5 MT/y

r usin g a n averag e weigh

t o f 12 5 g fo r TENER A E9-055. 0 5-7 3 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.8 9 5.2. 2 Pacifi c Sardin e
tw o yea r ol d sardine s (Hil l et

al
. i n press)
. Assuming , conservatively , tha t all o f thes e sardine s wer e vulnerabl e t o th e fishery, approximatel y 10 % o f thi s biomas s woul db e directe dt o th e liv e bait fishery (averag e valu e o f

$817/MT ) an

dth e remainder

wouldb e directe dto th e wetfish ' fisher y (averag e valu e o f

$74/MT)
. Thes e amount s translate int o $51/yr fro mth e liv e bait

fishery an d$42/yr

fro mth e wetfis h fishery
. Alternatively , th e estimate s o f annua l entrainment

mortalit y probabilit

y (P M range s fro m 0.0000669-0.000284 ) ca

n b e applie dt o th e proportio n ofth e recent stock siz e estimate s a

t ris k t o entrainment

assumin g n o compensation
. Hill et al
. (in press ) repor

t tha t approximately 337,59 6 M T o f Pacifi c sardin e wer

e present i n th e are afro

mMonterey Ba

y t o Sa n Diego
. The proportio n o f thi s amoun

t t o which P

M woul db e applie dwouldb e 16,900 MT , which i s approximately 5 % (th e averag e are aofth e spawnin g populatio n potentiall y affectedb y entrainment , basedo

n th e tw o estimate s usin g maximumandmea n larva l durations ) ofth e total biomas s withi n th e are a fro mSa n Dieg o t o Monterey . Usin g th e large r mor e conservativ e P

M estimate yield s apotentia

l los s o f 4. 8 M T o f Pacifi c sardin e a s aresult

o f entrainment
. B y apportionin g th e valuatio n o f catche s a s i

n th e AEL los s estimates , 4. 8 M

T represent s direc t

annua l dolla r valu e losse s o f

$39 0 t o th e liv e bait

fish^i^nd_$32^tothe wetfis h fishery
. Thes e estimate s indicate tha t DCP P entrainment

effect s represent

minima l ris k t o loca l o r regional population s o f

Pacifi c sardine
. Durin g th e perio do f powe r plan t operation s tha

t bega n i n 1985 , adul t

stock s o f Pacifi c sardin e hav e full

y recovered(Hil l e t

al
. i n press ) fromthei r populatio n cras h i

n th e lat e 1940' s an

dearl y 1950' s (PFM C 1998) , an dcommercia

l catche s hav e steadil y increase d(Star

r e t al
. 1998)
. Pacifi c sardin e larva e occurre depisodicall y i

n plankto n sample s collecte da

t DCP P durin g th e present

stud y andi n dat aset s spannin g alarge r time frame
. Ther e i s littl e possibilit

y tha t an y additiona

l larva l mortalit y du e t o entrainment

o f thi s specie s a

t DCP P i s affecting th e adul t

stock s whe

n one consider s th e uncommon occurrenc e o f Pacifi c sardin e larva

e i n plankto n tow s nea

r DCP P combine dwit

h th e trend s o f

increasin g abundanc e an dcatch
.

TENER A E9-O55. 0 5-7 4 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.9 0 5.2. 2 Pacifi c Sardin e Tabl e 5.2.2-1
. Percen

t maturit y of femal e Pacific sardine s (Sardinops sagax) i n th e Souther

n Californi aBigh

t an di n Montere y Ba y (Deris o et

al
. 1996)
. Ag e (yr ) 0 1 2 3 4 5 + % Matur

e (Souther n % Matur

e (Monterey , Califomi aBight

) California) 6 5 8 7 9 6 9 9 10 0 10 0 5 8

7 9 9 1 9 7 9 9 10 0
Tabl e 5.2.2-2 . Lif

e tabl e fo r Pacifi c sardin e (Sardinops sagax): a ) Age-specifi c fecundit y schedul e (M x =natalit

y rate ; L x =survivorship ) an db ) stage-specifi c survivorship schedul e (Z=instantaneou s daily mortality ; S=finit e surviva l rate ) modifiedfro

mButle r et al
. (1993)
. a ) Age-specifi c fecundit y

(continued ) TENER A E9-055. 0 Ag e (yr )

1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 M x 0

146,75 4 388,18 8 599,64 0 849,49 0 1,167,45 7 1,487,52 8 1,617,45 0 1,887,02 5 2,156,60 0 2,156,60 0 2,156,60 0 2,156,60 0
5-7 5 L x

1,000 67 0 44 9 30 1 20 2 13 5 9 1 6 1 4 1 2 7 1 8 1 2 8 M X L X 0 98,325,18 0 174,296,41 2 180,491,64 0 171,596,98 0 157,606,69 5 135,365,04 8 98,664,45 0 77,368,02 5 58,228,20 0 38,818,80 0 25,879,20 0 17,252,80 0

Fina l 316(b ) Demonstration Marc h 1,200 0P.9 1 5.2. 2 Pacifi c Sardin e Tabl e 5.2.2-2 . (continued ) b ) Stage-specifi c survivorshi p •Duration Duration Stag e Z

mi n Z^ , Z

m „ (d ) Cumulativ e (d ) S m „ S bes I S mi nCV bes t Eg g 0.310 0 0.720 0 2.120 0 Yolk-sa c 0.394 0 0.669 8 0.971 0 larv a Earl y larv a0.142 3 0.241 7 0.350 2
Earl y larv a0.142 3 0.241 7 0.350 2 Lat e larv a0.057 0 0.096 4 0.139 0 Earl y juvenil e 0.029 0 0.056 0 0.081 0 Juvenil e I 0.011 6 0.019 7 0.028 5 Juvenil e I I 0.002 3 0.004 0 0.005 8 Juvenil e II I 0.001 6 0.002 8 0.004 0 Juvenil e I V 0.001 2 0.002 2 0.003 2 Pre-recrui t 0.000 6 0.001 1 0.001 5

Survivorshi p fro mentrainmen t t o recruitment : 0.000 3

Tabl e 5.2.2-3 . Estimate d fishin g mortalit y rate s (F) o n Pacifi c sardin e (Sardinops sagax) fro m1983-1995
. Dat afro mDeris o e t al
. (1996)
. Ag e (yr ) Estimate d F Rang e 0 0.00-0.0 4 1 0.01-0.3 0 2 0.04-0.7 1 3 0.04-1.0 8 4 0.03-1.0 5 5 0.03-0.9 6

3 3 1 1 orsh i 1 1 3 5 2 5 5 0 

### no 146 170 17 5 6

1 7 p fromeg g 1 7 5 2 7 7 12 7 23 7 38 3 55 3 72 8 3 0.460 7

3 0.294 8 7.2 6 0.35 6 t o entrainment : 3.7 4 0.58 7 3 5 0.136 0 2 5 0.484 3 5 0 0.559 9 11 0 0.776 5 14 6 0.791 7 170 0.815 5 17 5 0.900 3 0.165 3

0.125 4 0.17 3 0.003 6 0.404 7 0.034 3 0.246 6 0.373 4 0.644 0 0.6644 0.688 0 0.824 9 0.005 0 0.049 3 0.078 8
0.27 0 0.007 7 0.132 0 0.240 5 0.528 3 0.557 7 0.5804 0.769 1 0.459 5 0.3264 0.26 7
0.13 1 0.624 3 0.238 1 0.142 5 0.064 2 0.058 7 0.056 9 0.026 5

TENERA E9-055. 0 5-7 6 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 2 Pacifi c Sardin e Tabl e 5.2.2-4
. Estimate dtota l annua l entrainmen

t (£ , ) an dstandar derro r ( SE(E T ) ) fo r Pacifi c sardin e (Sardinops sagax) larva e fro mth e thre e analysi s periods
. Analysi s Perio dE r SE(E T

) 1 ) Oct 23 , 1996-Sep30 , 1997 2 ) Octl,1997-Sep30 , 199 8 3 ) Ju l 1 , 1997-Jun30 , 199 8 368,00 0 104,000,00 0 104,000,00 0 103,00 0 7,430,00 0 7,430,00 0

Tabl e 5.2.2-5
. Estimate dtota l annua l adjustedentrainmen

t (E Adj

_ T ) an d standar derro r ( SE(E MJ

_ T ) ) fo r Pacifi c sardin e (Sardinops sagax) larva e fro m th e thre e analysi s periods
. Analysi s Perio d E Adj . T SE(E Adj

_ r) 1 ) Oc t 23 , 1996-Sep30 , 1997 2 ) Octl , 1997-Sep30 , 199 8 3 ) Ju l 1 , 1997-Jun 30 , 199 8 8,470,00 0 22,600,00 0 22,600,00 0 2,360,00 0 1,610,00 0 1,610,00 0

TENER A E9-055. 0 5-7 7 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.9 3 5.2. 2 Pacifi c Sardin e
Tabl e 5.2.2-6
. Estimate dnumbe r o f Pacifi c sardin e (Sardinops sagax) adult female s ( FH ) whos e reproductiv e output wa s equivalent

t o th e adjustednumbe

r o f larva e entraine dpe

r yea r ( E Adj

_ T ) a t Diabl o Canyo n Powe

r Plan t includin g th e standar

derro r ofth e estimate (SE(FH)) an d90 % confidenc e limit s (C.L.)
. Analysi s Perio d FH Uppe r Lowe

r SE(FH) 90 % CL
. 90 % CL
. 1 ) Oct 23 , 1996-Sep30 , 199

7 3,17 0 12,100 1,690,00 0 6 2 ) Octl , 1997-Sep30 , 199 8 8,46 0 32,30 0 4,490,00 0 1 6 3 ) Jull,1997-Jun30 , 199 8 8,46 0 32,30 0 4,490,00 0 1 6

Tabl e 5.2.2-7
. Pacifi c sardin e (Sardinops sagax): Sensitivit y analysi s fo

r FH fro mth e thre e analysi s period s recalculate dfo r each model input

parameter

(0): E

AdJ

_ T ± 1.64 5 SE(0) ; other

parameter s ar e 0. e

±i645CK«?

) wher e CV(0) = 1.

0 o r 100%
. a ) Analysi s Perio d1 : Octobe r 1 , 1996-September30 , 1997

Paramete r FH F-Adj-T 5 egg S yolk-sac

• S larvae #Eggs/y r Longevit y Maturatio n Estimat e

= 3,17 0 8,470,00 0 0.16 5 0.125 0.17 3 496,00 0 5 2 Minimu m

1,720 61 3 61 3 61 3 61 3 1,19 0 2,38 0 Recalculate dFH

Maximu m
4,63 0 16,40 0 16,40 0 16,40 0 16,40 0 6,35 0 9,52 0 Rang e

2,91 0 15,80 0 15,80 0 15,80 0 15,80 0 5,16 0 7,14 0

TENER A E9-055. 0 5-7 8 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.9 4 5.2. 2 Pacifi c Sardin e
Tabl e 5.2.2- 7 (continued) . Pacifi c sardin e (Sardinops sagax): Sensitivit y analysi s fo

r FH fro mth e thre e analysi s period s recalculate dfo r each mode

l inpu t paramete r (9): E Adj . T ± 1 -64 5 SE(9) ; other

parameter s ar

e 6e ±x M5cy W wher e CV( 9) = 1.

0 or 100%
. b ) Analysi s Perio d2 : Octobe r 1 , 1997-Septembe

r 30 , 199 8
Parameter FH F-Adj-T S egg
s yolk-sac S larvae it Eggs/yr Longevit y Maturatio n Estimat

e

= 8,46 0 22,600,00 0 0.16 5 0.12 5 0.17 3 496,00 0 5 2 Minimu

m 7,46 0 1,63 0 1,63 0 1,63 0 1,63 0 3,17 0 6,34 0 Recalculate dFH

Maximu m 9,45 0 43,80 0 43,80 0 43,80 0 43,80 0 16,90 0 25,40 0 Rang e

1,99 0 42,20 0 42,20 0 42,20 0 42,20 0 13,700 19,000

c ) Analysi s Perio d3 : July , 1997-Jun e 30 , 199 8

Paramete r FH F-Adj-T •
s egg S yolk-sac S larvae ti Eggs/yr Longevit y Maturatio n Estimat

e

= 8,460 22,600,00 0 0.16 5 0.12 5 0.17 3 496,00 0 5 2 Minimu

m 7,47 0 1,63 0 1,63 0 1,63 0 1,63 0 3,17 0 6,35 0 Recalculate dFH

Maximu m 9,45 0 43,80 0 43,80 0 43,80 0 43,80 0 16,90 0 25,40 0 Rang e

1,99 0 42,20 0 42,20 0 42,20 0 42,20 0 13,700 19,000

TENER A E9-055. 0 

# i 5-7 9 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.9 5 5.2. 2 Pacifi c Sardin e
Tabl e 5.2.2-8
. Estimate dnumbe r o f equivalent

Pacifi c sardin e (Sardinops sagax) adult s (AEL ) equa

l t o th e adjuste dnumbe

r o f larva e entraine dpe

r yea r (E Adj

_ T ) a t Diabl o Canyon Powe

r Plant includin g th e standar

derro r ofth e estimate (SE(AEL) ) and90 % confidenc e limit s (CL.)
. Analysi s Perio d •Uppe r Lowe

r AEL SE(AEL) 90 % CL
. 90 % CL
. 1 ) Oc t 23,1996-Sep30,199 7 2 ) Octl , 1997-Sep30,199 8 3 ) Jull,1997-Jun30,199 8 2,63 0 10,30 0 1,650,00 0 7,00 0 27,40 0 4,390,00 0 1 1 7,00 0 27,40 0 4,390,00 0 1 1

TENER AE9-055. 0 5-8 0 Fina l 316(b ) Demonstratio n Marc h 1,200 05.2. 2 Pacifi c Sardin e

Tabl e 5.2.2-9 . Pacifi c sardin e (Sardinops sagax): Sensitivit y analysi s fo

r AEL fro mth e thre e analysi s period s recalculate dfo r eac h mode l inpu t paramete r (6): E

Adj

_ T ± 1.64 5 SE(0); othe

r parameter s ar

e 0. e ±lM5CV W

where CV(0) = 1.

0 or 100%
. a ) Analysi s Perio d1 : October 1 , 1996-Septembe

r 30 , 1997
Paramete r AEL = ^Adj-T • S early larvae S late larvae S early juvenile S juv. I S juv. II S juv. Ill

. S juv. TV S pre-recruit Estimat e

2,63 0 8,470,00 0 0.405 0.034 3

. 0.24 7 0.37 3 0.64 4 0.66 4 0.68 8 0.82 5 Minimu m

1,420 50 7 50 7 50 7 50 7 50 7 50 7 50 7 50 7 Recalculate dAEL

Maximu m 3,83 0 6,49 0 13,60 0 10,70 0 7,03 0 4,08 0 3,95 0 3,82 0 3,18 0 Rang e

2,41 0 5,98 0 13,10 0 10,10 0 6,53 0 3,57 0 3,45 0 3,31 0 2,68 0

TENER A E9-055. 0 5-8 1 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.9 7 5.2. 2 Pacifi c Sardin e Tabl e 5.2.2- 9 (continued) . Pacifi c sardin e (Sardinops sagax): Sensitivit y analysi s fo

r AEL fro mth e thre e analysi s period s recalculate dfo r eac h model input

parameter

(0): E A dj-T ±1-64 5 SE(9); othe

r parameter

s ar e 0. e ±lM5C, 'W

where CV(0)= 1.0 or 100% . b ) Analysi s Perio d2 : Octobe r 1 , 1997-September

30,199 8
Paramete r AEL = E ^Adj-T • S early larvae S late larvae S early juvenile S juv. I S juv. II S juv. Ill S juv. W S pre-recruit Estimate

7,00 0 22,600,00 0 0.40 5 0.034 3 0.24 7 0.37 3 0.64 4 0.66 4 0.68 8 0.82 5 Minimu

m 6,18 0 1,35 0

' 1,35 0 1,35 0 1,35 0 1,35 0 1,35 0 1,35 0 1,35 0 Recalculate dAEL

Maximu m 7,82 0 17,300 36,30 0 28,40 0 18,700 10,900 10,500 10,20 0 8,49 0 Rang e

1,65 0 15,900 34,90 0 27,00 0 17,400 9,52 0 9,18 0 8,82 0 7,13 0

TENER A E9-055. 0 5-8 2 Fina l 316(b ) Demonstratio n Marc h 1,200 0j ^ 8 ^ 1 5.2. 2 Pacifi c Sardin e Tabl e 5.2.2- 9 (continued) . Pacifi c sardine (Sardinops sagax): Sensitivit y analysi s fo

r AEL fro mth e thre e analysi s period s recalculated fo r eac h mode l inpu t paramete r (0): E A dj-T ± J - 64 5 SE0) \ other

parameter s ar

e 0. e ±iM5Cvm wher

e CV( 0) = 1.

0 o r 100%
. c ) Analysi s Perio d3 : July 1 , 1997-Jun e 30 , 199 8

Paramete r AEL = ^Adj-T S early larvae S late larvae S early juvenile S juv. I S juv. II S juv. Ill S juv. IV S pre-recruit Estimat e

7,00 0 22,600,00 0 0.40 5 0.034 3 0.24 7 0.37 3 0.64 4 0.66 4 0.68 8 0.825 Minimu m

6,18 0 1,35 0 1,35 0 1,35 0 1,35 0 1,35 0 1,35 0 1,35 0 1,35 0 Recalculate dAEL

Maximu m 7,83 0 17,30 0 36,30 0 28,40 0 18,80 0 10,90 0 10,50 0 10,20 0 8,49 0 Rang e

1,65 0 16,00 0 34,90 0 27,00 0 17,40 0 9,52 0 9,19 0 8,83 0 7,14 0

TENER A E9-055. 0 5-8 3 Fina l 316(b ) Demonstratio n Marc h 1,200 0P.9 9 5.2. 2 Pacifi c Sardin e
Tabl e 5.2.2-10
. Pacifi c sardin e (Sardinops sagax): Monthly estimate s o f proportiona

l entrainment

(PE, ) an dannua l proportio n o f

larva e hatche di

n th e rt h surve y perio d(£) withi n a n analysi s perio d(e.g. , Jul y 1 , 1997-Jun e 30 , 1998 ) wit h associate dstandar

derror s (SE) use di

n estimatin g entrainment

mortalit y fo r tw o year s o f

paire dentrainment

an dstud y gri dsurveys . a ) Analysi s Perio d3 : Jul y 1 , 1997-Jun e 30 , 199 8 Survey Star

t Dat e PE. ££(/>£,. ) fi

b ) Analysi s Perio d4 : Jul y 1 , 1998-Jun e 30 , 199 9 Survey Star

t Dat e PE SE(PE,) fi 

### SE(f.) Ju l 21 , 199 7 Au g 25 , 199 7 Se p 29 , 199 7 Oct20 , 199 7 No v 17 , 199 7 De c 10,199 7 Ja n 22,199 8 Feb 26 , 199 8 Ma r 18 , 199 8 Ap r 15 , 199 8 May 18 , 199 8 Ju n 8 , 199 8 0

0 0 0 0 0 0 0 0.0009 2 0.0008 4 0.0009 6 0.0019 9 0

0 0 0 0 0 0 0 0.0001 1 0.0002 1 0.0003 2 0.000 7 0

0 0.0009 1 0 0 0 0.0004 3 0 0.06 6 0.12 3 0.80 2 0.0078 4 0

0 0.0002 4 0 0 0 0.0001 5 0 0.0025 4 0.0053 8 0.0067 6 0.0010 7
-*(/,) Ju l 21 , Au g 26 , Se p 16 , Oct6 , No v 11 , De c 9 , Ja n 12 , Feb 3 , Ma r 17 , Ap r 14 , Ma y 24 , Ju n 23 , 199 8 199 8 199 8 199 8 199 8 199 8 199 9 199 9 199 9 199 9 199 9 199 9 "- " = no estimat

e of standar derror TENER A E9-055. 0 0 0 0 0 0 0 0.85 9 0 0 0 0 0 becaus e onl

y one 0

0 0 0 0 0 0.91 1 0 0 0 0 0 fis h was collecteddurin g 5-8 4 0

0 0 0 0 0 1 0 0 0 0 0 thi s surve y perio d 0 0 0 0 0 0

- 0 0 0 0 0
Fina l 316(b ) Demonstratio n Marc h 1,200 0