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# fr*-S » 

# FAWLE Y 

# Consultancy Report

* 3 ' = 5 C J 2
3 3 O 

## Client : Heysham 2 Powe rStatio n



# BUBBL ECURTAI

N FIS H EXCLUSION TRIAL S AT HEYSHA M 2 POWE

RSTATION FEBRUAR

Y 199 3

A WH Turnpenny

Fo r th e attentio n of

: M r K S White , Statio n Manager

Marc h199 3
FC R037/93



# a yP. 3



## SUMMAR

Y A bubbl e curtain , 8 0 mi n length , wa s place dacros s th e intake entranc e o f Heysha m1 an d 2 Power Stations

. Thi s wa s lai din acurve , angle dt o th e incomin g flow , s o a s t o guid e fish alon g th e fac e o f

th e curtai n t o safety

. Th e installatio n o f th e bubbl e curtai n wa s undertake n b y Heysha

m2 Power

Station

. Th e effectivenes s of

th e bubbl e curtai n a s afishexclusio n devic e wa s teste db y FAWLE Y arl Ltd . Trial s too k

plac e over

a24 da y period , fromFebruary 4t h- 27th , 1993 , o n Heysha m2 Power

Statio n only

. Th e bubbl e curtai n wa s switche do n o r of f on alternatin g days , andth e catche s of

fishandshrimp s recorde dhourly over astandardsix hou r

samplin g perio daroun dlo w water

eac hday

. Environmental variables , includin g daylight/darkness , water temperature , salinit

y andtidal height

wer e recorde dfo

r eac hsamplin g period

. Th e effect of daylight/darknes s wa s of chie f interest , sinc e other

researcher s hav e foundbubbl e curtain s t o b e ineffectiv e a t night

. Durin g th e survey , some 54,00 0 fish, weighin g 35 2 k g andrepresentin g 4 2 specie s wer e collecte dfro

mth e C Wintakes , and16,00 0 shrimp s (Crangon crangon), weighin g 1 5 kg

. Th e majorit

y o f th e fishcaugh t

wer e clupei dfish(sprat , Sprattus sprattus an dherring , Clupea harengus), whichconstitute d87 % o f th e fishsamples

. Gadoid s (mainly whiting , Merlangius merlangus) wer e th e secondmos t important

group , wit

hrelativel y fe

w flatfis h an dindividual s o f

other species

. Th e number s of

fishcaught

wer e sufficien

t fo r asuccessful trial o f

th e bubbl e curtain

. Conclusion s 1 Th e bubbl e curtai n significantly reduce dth e catc hof fishandshrimp s (p<0.01)

. Durin g th e trial , th e followin g catchreduction s wer e observe dwit hth e bubbl e curtai n operating : Flatfis h

Clupeid s Gadoid s Other s Total Fis h Shrimp s 6 % 31 % - 1 % 41 % 30 % 28%

. Th e hig hproportio n of

clupeid s strongl y influence dth e total fish figure. Th e effec t o n shrimp s wa s no t

expected , andca

n b e regarde da s abonus

. 2 Th e finding s wit

hrespec t to catche s i n daylight

versu s darknes s contradic t earlie r finding s o f

othe r researcher s mainly base do n laborator y studies

. Bot

hfishandshrimp s wer e mor e effectively exclude dat night , th e difference s bein g highly statisticall y significant (p
= 0.0 1 - < 0.001)

. Thi s ma y hav e bee n relate dt o th e nocturnal behaviou r o f bothclupeid s andshrimps , whic htendt o ris e into th e water colum n at night

. I t i s hypothesize dthat

th e upper level s of abubbl e curtai n ma

y b e more effectiv e at

repellin g fish , owin g t o th e highe r bubbl e volum e andsurfac e counter-curren t formation

. Shrim

p repulsio n i s almos t

certainl y physical , no t

behavioural

. I t

i s conclude dtha

t air-lif t convection , possibl y augmente db y tactil e an dauditor

y stimuli , wer e responsibl e for fishandshrim

p deterrence , an dthat

visualP. 4



## stimul i wer e unimportant

in thi s case . 3 Th e differenc e in performanc e of th e barrie r

i n daylight

versus darknes s i s o f

practica l consequence . I

n th e absenc e o f

th e bubbl e curtain , fishcatche s ros e b y afactor o f 2.4 4 at night , an dshrim

p catche s b y afactor

o f 27

. A barrie r

whic hwa s no t

effectiv e at

nigh t woul dtherefore b e of

limite dvalue , andth e effectivenes s o f th e Heysha

mbubbl e curtai n at night i s awelcome finding

. Furthermore , sinc e mos t fishandshrimp s ar e caugh t in th e autum n an dwinte r

time, when da

y lengt hi s short , th e proportional reductio n in fishan d shrim p catc htaken ove r

afull year , assumin g th e same specie s balanc e throughout , i s estimate dt o b e 37 % for

fishan d56 % for

shrimps

. In practic e th e efficac y figure for fish ma y b e lowere dat

other times o f th e year , owin g to th e les s prominen t contributio n o f clupeid s to th e catch

. 4 W e consider

th e desig n andplacement

of th e bubbl e barrier , a s tested , t o b e optimize d for th e location

. Any further improvement s woul dinvolv e th e us e o f augmentory stimuli , sucha s sound

.

A WH Turnpenn y for : FAWLE Y aquati c researc hlaboratorie s Lt d Marin e & Freshwater

Biolog y Uni t Fawley , Southampto n S0 4 1T W

FAWLE Y aquati cresearc h laboratorie s LtdP. 5



## CONTENT S INTRODUCTIO N
METHOD S 2. 1 Th e Bubbl e Curtai n 2. 2 Th e Tes t

Programm e 2. 3 Fis han dShrim

p Samplin g 2. 4 Measurement

of Environmental Variable s 2. 5 Dat aAnalysi s
RESULT S 3. 1 Environmental Condition s Durin g th e Trial s 3. 2 Bulk

compositio n of

th e Catc h 3. 3 Overal l Performanc e o f th e Bubbl e Curtai n 3. 4 Compariso n o f

Performanc e i n Daylight andDarknes s 3. 5 Lengt

hCompositio n of

Fis hSample s
DISCUSSIO N CONCLUSION S Acknowledgement s REFERENCE S TABLE S FIGURE S APPENDICE S

FAWLE Y aquati cresearc h laboratorie s Lt dP. 6



## 1 INTRODUCTIO N In apreviou s repor

t t o Heysha

m2 Powe r

Station , FAWLE Y ar l Lt d (Turnpenny an d Henderson , 1992 ) provide daspecificatio n fo r abubbl e barrier , designe dt o reduc e fishcatc h o n the coolin g water

intake screens . Th e report als o propose dadesig n for ates t programm e which , i t wa s recommended , shoul dtak e plac e ove r atwelv e da

y perio ddurin g th e autumn , whe n seasonal fishcatche s hav e previousl y bee n foundt o b e maximal

. Thi s wa s t o involv e alternatin g day s wit

hth e bubbl e curtai n turne do n an doff , samplin g ove r

asi x hou r

perio d centrin g o n lo w water , th e tidal state whe n fishcatc hi s maximal

. Th e tes t wa s als o designe d t o includ e period s o f

daylight an ddarkness , sinc e previou s studie s hav e indicate dtha t bubbl e curtain s ma

y no t b e effectiv e in th e dark

. In th e event , i t

wa s no t feasibl e for

Nuclea r Electri c t o mount

ates t programm e i n th e autumn o f 199 2 an di t

wa s delaye dunti l earl y 1993

. T o enabl e an adequate statistical analysi s o f th e result s wit

hth e lowe r

fishcatche s expecte da t thi s tim e o f

th e year , FAWLE Y ar l Lt d recommende dtha

t th e tes t schedul e shoul db e double di n lengt ht o 2 4 days

. A bubbl e curtai n wa s installe db y th e Powe r Statio n accordin g t o th e desig n recommendation s i n tim e for testin g t o begi n i n February

. Th e tes t programm e wa s carrie dout betwee n 4t

han d27th February , 1993

. 2 METHOD S 2. 1 Th e Bubbl e Curtai n Th e bubbl e curtai n desig n specificatio n i s give n b y Turnpenn y an dHenderso n (1992)

. Th e installe dequipment

deviate donl y slightl y fromth e specification

. Th e recommende dai r outle t hol e siz e o f

0.3 8 m mprove ddifficult

t o dril l an dalarge r

hol e siz e o f

1 m mwa s used

. Thi s wa s acceptabl e sinc e th e ai r compresso r

use d(1 2 m3 

## min ) wa s capabl e o f supplyin g wel l i n exces s of th e specifie d1. 5 m 3 

## min 1



## . Th e lin e ofth e bubbl e curtai n followe dclosel y th e recommende dlin e a s show n i n Figur e 1

. Plate 1 show s th e surfac e o f th e wate r

wit hth e bubbl e curtai n i n operation

. 2. 2 Th e Tes t

Programm e Th e tes t programm e wa s intende dto compris e si x hou r samplin g periods , centrin g o n lo w water (LW) o n consecutiv e days , wit hth e bubbl e curtai n turne do n o r of f o n alternativ e days

. I n practice , th e bubbl e curtai n was no t commissione dunti l th e thir dday o f th e trial s an ds o th e first tw o days ' fishan dshrim p count s wer e mad e wit

hth e bubbl e curtai n no t

operatin g (contro l periods)

. Th e bubbl e curtai n wa s the n operate d(tes t periods ) continuousl y for tw o days , but thereafter th e programm e reverte dt o plan , withalternatin g tes t an dcontro l days

. Th e ful l programm e schedul e i s show n i n Figur e 2

. Fo r eac h'test ' day , th e bubbl e curtai n wa s switche do n at th e en dofth e previou s 'control ' samplin g period , t o allo w th e systemt o equilibrat e before samplin g began

. Th e mai n purpos e o f thi s wa s t o clea

r a s many a s possibl e o f th e fishoccupyin g th e zon e betwee n th e

FAWLEY aquati cresearc h laboratorie s LtdP. 7



## bubbl e curtai n an dth e CWscreens . Chlorin e wa s als o injecte dcontinuousl y durin g th e trial s a t anominal concentratio n o f 0. 2 pp mt o reduc e fishresidenc e times i n th e screenwells , followin g th e recommendation s o f Turnpenn y andHenderso n (1992)

. 2. 3 Fis han dShrim

p Samplin g Recordin g Impinge dfishan dshrimp s wer e sample dcontinuousl y fromall workin g C Wscreen s ove r eac hsi x hou r

samplin g period

. Thes e wer e obtaine db y placin g Netlon® plasti c mes hbasket s (— 6 m mmes hsize ) int o th e screen backwas hgulleys

. Th e sample s wer e sorte dt o specie s level , andtotal number s andweight s pe r hour wer e recorde dfor

selecte dkey specie s an dfor th e su mo f other species

. Th e ke y specie s ar e liste don th e raw dat arecordin g sheet s given i n Appendix 1

. Fo r

non-ke y species , total s wer e recorde donl y for

eac hda y o f th e trials

. Fo r th e key fishspecies , individual lengt hmeasurement s wer e mad e (standardlength : tip o f snout to caudal peduncle) , to th e neares t 5 mm , fo

r u p t o 20 0 individual s pe r

day

. Thes e wer e no t segregate dint o hourl y groups . Fo r th e brow n shrim

p (Crangon crangon), number s wer e counte dor , wher e larg e number s wer e present , determine dfro mth e sampl e weight , base do n amea

n individual weight

of 0.7 4 g pe r

shrimp

. Th e shrimp s wer e o f approximatel y unifor

msize

. 2. 4 Measuremen t

o f Environmental Variable s Wate r temperatur e andsalinit

y wer e measure dat

aconvenient

time durin g eac hsix hou r period

. Fo r

thi s purpose , wate r

wa s draw n b y bucke t

fromth e screenwel l an dth e measurement s wer e mad e usin g atemperature-compensate dinductiv e Salinomete r (Woodmil l Instruments , Southampton)

. Tida l height

an dhour s o f

sunris e an dsunse t

wer e taken a s nominal value s fromLiverpoo l Tid e Tables , correcte dfor th e Port of Heysham

. 2. 5 Dat aAnalysi s Record s mad e durin g th e tria l wer e transferre dto aLotu s 1-2-3® spreadsheet , no w hel dwit h th e original recordsheet s i n th e Nuclea r Electri c Archiv e a

t FAWLEY ar l Ltd . Al l analyse s wer e base don scree n catche s standardize dto thre e operatin g C Wpump s o n Heysha m2

. Thi s wa s th e actual operational state , apar t fromdurin g th e perio d4-6t h February when onl y tw o pump s wer e running

. Catche s fromthes e day s wer e multiplie db y 3/2

. Al l statistical analyses , includin g standarderro r calculation s andregressio n analyses , wer e performe dusin g th e statistical function s o f Lotu s 1-2-3

. Fis handshrimp catches , wer e log 10 

## - transforme dfor

regressio n analysi s an dfor geometri c mea

n an dstandarddeviatio n calculation s (Turnpenny , 1983)

.
FAWLEY aquati cresearc h laboratorie s Lt dP. 8



## 3 RESULT S 3. 1 Environmental Condition s Durin g th e Trial s Dail y record s of

th e environmental variable s measure dar e give n i n Appendi x 1

. A summar y i s give n i n Tabl e 1

. 3. 2 Bulk

Compositio n o f

th e Catc h Durin g th e 2 4 day s o f

th e survey , atotal o f

53,58 9 fishwa s collecte di n scree n samples

. Thi s woul dhav e represente dles s tha n hal f o f th e total catc hfor

th e period , sinc e samplin g wa s onl y fo r

si x hour s per

day , bu t mor e tha n aquarter , a s th e majorit y o f fishar e caugh t aroun dth e LWperio do f th e tidal cycle

. Th e total weight o f thi s catc hwa s 35 2 kg

. A total o f 4 2 specie s wa s recorded

. Thes e ar e liste din Tabl e 2 wit hthei r respectiv e total s for tes t an dcontro l periods , andgran dtotals

. Fo r simplicity , th e remainde r o f th e analysi s refer s t o th e followin g taxonomi c group s andno t to individual species : Flatfishes : plaice , dab , sole , flounde r Clupeids : sprat , herrin g Gadoids : whiting , pout , poo r cod , Norway pout , rockling s Othe r species : al l other s liste di n Tabl e 2

. Figur e 3(a ) an d(b ) sho w th e relativ e abundanc e o f eac ho f thes e group s b y numbe r an d weight respectively

. Clupeid s formedb y fa r th e mos t prominen t

elemen t o f th e catch , bein g 87.3 % b y numbe r

an d59.8 % b y weight

. Gadoid s wer e th e nex t mos t importan t

(7.2 % b y number , 34.7 % b y weight) , othe r species , includin g flatfishes , bein g o f lesse r significanc e (5.4 % b y number , 5.5 % b y weight , in total)

. 3. 3 Overal l Performanc e o f th e Bubbl e Curtai n Th e dail y total catche s o f fishandshrimps , for

tes t an dcontro l days , ar e show n i n Figur e 4

. Take n ove r

th e whol e trial period , catche s o f fish(al l species ) wer e lower , numerically , b y 30 % (Tabl e 3)

. Gadoid s wer e leas t affecte d(-1 % reduction) , followe db y flatfis h(6%)

. Clupeid s wer e reduce db y 31% , an dther e wa s a41 % reductio n i n th e remainin g species

. Shrim p number s wer e lowe r

b y 28 % wit

hth e bubbl e curtai n operating

. Correc t functionin g o f

th e bubbl e curtai n wa s maintaine dthroughou t th e trial , thoug hdiver s workin g o n adamage ddolphi n structur e clos e to th e bubbl e curtai n lin e o n 17t hFebruary ar e believe dt o hav e disrupte dth e integrity of th e bubbl e curtain

. Thi s ma y accoun t fo r it s apparentl y reduce deffectivenes s o n tha t dat e (Figur e 4)

. A numbe r o f environmental factor s ma y affect fishcatc ho n powe r

stations , an dt o asses s th e effect o f som e o f thos e measure di n th e study , amultipl e regressio n analysi s wa s performed

. Th e result s ar e presente dseparatel y for fishan dshrimp s i n Tabl e 4

. Not e tha t th e dependan t variabl e (fis ho r

shrim p numbers ) ha s in eac hcas e been log 10 

## -transformed , s o that th e

FAWLEY aquati cresearc h laboratorie s Lt d

### P. 9



## equatio n i s o f

th e general form : y = antilog 1 0 

## (b 0 

## + b , x , + b 2 

## x 2 

## + b n 

## xj , wher e y i s fisho r

shrim p catch , b 0 

## i s th e constant , x, , x 2 

## .. . x „ ar e th e x variable s (temperature , salinity , light , tide, bubbles ) andb, , b 2 

## .. . b n

## ar e th e compute dcoefficients

. Whether o r no t th e coefficient s ar e significantl y different fromzer o ca

n b e judge dfromth e t-value s compute dfro

mth e standarderror . Th e probability , p , indicate db y th e t-value s show s that

bot hfo r fishandshrimp s th e bubbl e curtai n effect i s significant

( p <0.00 1 for fish , p <0.00 5 fo

r shrimps)

. Thes e equation s predic t catc hreduction s o f

33 % an d44% , respectivel y for

fish(al l species ) an dshrimps

. I t i s als o seen that

wate r temperature , salinity , ligh t

versu s dark , andtidal height al l sho w asignificant

relationshi p wit

hfishcatc h ( p <0.05 ) andal l o f

thes e bu t salinit y affect shrim p catch

. The y d o not , however , preven t th e effect o f th e bubbl e curtai n bein g distinguished

. 3. 4 Compariso n of

Performanc e in Daylight andDarknes s T o compar e bubbl e curtai n effectivenes s for ligh t versus dar

k periods , a

n equal numbe r

of hourl y sampl e record s for ligh t anddar k condition s wa s selecte da t rando mfromth e total se t o f records , givin g equal representatio n fo r eac ho f th e six tidal state s (hour s 1 t o 6 ) in dail y samples

. Selectin g thi s subset o f dat awa s necessar

y because , i n th e full se t o f data , agreate r number o f daylight sample s occurre dtoward s th e beginnin g o f th e si x hou r samplin g period , at

atidal state when fishcatc hwa s belo w averag e (Figur e 5)

. A compariso n o n th e whol e data-se t woul dtherefore hav e generate dalow-bia s in dayligh t samples

. A total of

8 4 hourl y samples , hal f

taken in daylight

andhal f in darkness , wa s use d i n th e comparison

. Th e results , shown in Tabl e 5 , demonstrate marke dandsignificant differences , betwee n hourl y catc hrate s in daylight an ddarkness , bot

hwit handwithou t

th e bubbl e curtai n operating

. Wit

hn o bubbl e curtai n operating , fishandshrim p catche s wer e highe r

at night b y factor s o f

2. 4 and2 7 respectively

. Th e catc hreductio n b y th e bubbl e curtai n wa s als o highe r at night , no t

i n daylight a s hadbeen expected , for bot hfishan dshrimps

. Ther e wa s a43 % reductio n in fishcatc ha t night (cf

. 21 % i n daylight) , and58 % reductio n i n shrimp s (cf

. -11 % i n daylight) Th e statistical significanc e of th e catc hdifference s fo

r daylight versus darknes s andbubbl e curtai n "on " versus "off

i s show n i n th e lower

half o f Tabl e 5 , wher e t-tes t

comparison s for significant difference s between th e geometri c mean s ar e made

. Thes e sho w that al l difference s ar e significant at th e p <0.0 5 - < 0.00 1 level , wit hth e exceptio n o f

bubbl e barrie r "on " versus "of

f condition s i n daylight

. Fo r bot hfishandshrimps , therefore , bubbl e curtai n effectivenes s durin g daylight hour s i s no t

uphel db y th e trials

. Thi s doe s no t

necessaril y mea

n tha t th e barrie r

ha s n o effect

i n daylight , bu t

rathe r that any effec t i s smal l compare dto othe r factors

. In th e cas e o f

shrimps , daytim e catche s ar e s o smal l (< 4 pe r

hour) tha

t th e lac k o f any effectiv e daytim e deterrenc e woul db e o f n o practical concern .
FAWLEY aquati cresearch laboratorie s Lt dP.1 0



## 3. 5 Lengt

hCompositio n of

Fis hSample s Fo r sprat , herring , whitin g an dth e 5-bearde drockling , th e fou r commones t

species , length

frequenc y histogram s ar e compare dfor tes t an dcontro l period s in Figure s 6(a)-(d)

. Thes e indicat e th e generall y smal l size s o f mos t of th e fishcaught , ove r

9 5 % of whic hwer e < 2 0 c mi n length , an dth e absenc e o f any significant

differenc e i n siz e betwee n tes t an dcontro l periods

. Thi s compariso n wa s mad e to evaluate th e possibility tha t th e onl y large r

fishwer e exclude db y th e barrier , wit hsmaller one s no t bein g abl e t o resis t

th e intak e flow

. Thi s wa s apparentl y not

th e case .
4 DISCUSSIO N Th e result s o f

th e Heysha

m2 trial s ar e in marke dcontras t to som e othe r

studie s whic h investigate dth e us e o f

bubbl e curtain s for

fishexclusion

. Thes e wer e reviewe dbriefl y b y Turnpenn y an dHenderso n (1992) , wh o liste dvariou s powe r statio n trials , includin g on e i n th e U K (Uskmout

hPower Station ) andseveral i

n th e USA , wher e n o demonstrabl e fish exclusio n wa s found

. However , they als o pointe dou t tha t ther e wer e desig n flaws i n mos t o f thes e trials , for

exampl e bubbl e curtain s place dto o clos e t o th e intakes , wher e velocitie s wer e likel y t o b e excessive , an dth e lac k o f any guidin g property t o leadfisht o safety

. Th e principl e o f

th e Heysha

m2 desig n follow s th e recommendatio n o f Mischenk o an d Pestryako v (1986) , wh o propose dth e us e of barrier s angle dt o th e incomin g flow , rathe r tha n normal t o it , s o tha

t fishwoul db e encourage dto mov e laterall y acros s it

. Th e modes t succes s o f

th e Heysha

m2 schem e indicate s that th e desig n wa s good , indee dw e ca n thin k o f n o further

improvement s andconsider i t a n optimize ddesig n for

abubbl e barrie r

for thi s location

. Any further

improvement s woul dinvolv e th e us e o f augmentory stimuli , sucha s soun d(Turnpenn y an dHenderson , 1992)

. Th e effectivenes s of

th e bubbl e curtai n at

night wa s a n unexpecte doutcom e o f th e trials

. In laboratory experiments , wher e bubbl e curtain s hav e been show n to b e effectiv e a s fish barrier s (se e Turnpenn y an dHenderson , 199 2 review) , thei r effec t ha s generall y bee n attribute dprimaril y t o visual detectio n by th e fishand , t o alesser extent , aural an dtactil e cues , s o that

effectivenes s i s muchreduce din th e dark

. Th e result s o f th e Heysham2 trial s sho w that no t onl y di dth e bubbl e curtai n continu e to exclud e fishan dshrimp s after dark , but that i t worke dbette r

at night

. Thi s mus t

impl y tha

t som e additional mechanis mcome s int o play at

night since , wer e aural andtactil e stimul i th e mean s b y whic hfishdetecte dth e barrier , thes e woul db e n o different at nigh t fromth e daytime

. Th e fac t that th e fishwer e comprise dmainly o f clupei dspecie s ma

y offe r aclu e a s t o th e mechanism

. Sprat s an dherring s ar e schoolin g specie s whic hfor mclosel y aggregate dshoal s lo w i n th e wate r

colum n durin g th e hour s o f

daylight

. At

night , when visual contac t betwee n individual s i s lost , th e shoal s ten dt o for mlooser aggregation s throughou t

the

. wate r

column (Blaxter an dHunter , 1982)

. Fo r

tw o reasons , th e uppe r

par t o f abubbl e plum e ma

y b e mor e effectiv e a t

repellin g fish: first, becaus e a s th e hydrostati c pressur e decreases , bubbl e siz e an dhenc e plum e volum e increas e s o tha t i t presumabl y become s mor e detectabl e b y fish ;

FAWLEY aquati cresearc h laboratorie s Lt dp.1 1



## secondly , a s th e bubbl e plum e convect s upward s toward s th e surface , i t entrain s water , whic h spill s ou t i n bot hdirection s normal t o th e lin e of th e bubbl e curtain

. Thi s induce s acounte r cunen t o f some strengt

hin th e upstrea

mdirectio n relativ e to intake flo w (Figur e 7)

. Thi s wa s no t measure da

t Heysha mbut , fro

mobservation , ma

y hav e bee n wel l in exces s of 1 m s" 1



## . I t i s hypothesized , therefore , tha t th e observe dreductio n o f fishcatc hwa s cause db y physical repulsio n b y convectio n cunent s rathe r than , o r a s wel l as , activ e fishavoidance

. Th e reduce deffec t

o n other specie s woul dthen b e attributabl e t o th e deepe r positio n occupie d b y the mi n th e water

column

. Th e propose dexplanatio n o f shrim p exclusio n i s simila

r t o that for clupeids

. Shrimp s ar e essentiall y nocturnal animal s which , durin g th e daytime , res t on th e se abe d(Yonge , 1958)

. A t nigh t the y ris e int o th e water

column , s o becomin g vulnerabl e t o impingement

. I t i s mos t likel y that

shrimps , bein g smal l creature s of ~ l g weight , ar e subjecte dt o th e air-lif t principl e i n th e curtain , aproces s cause db y acombinatio n o f attachmen t

o f micro-bubble s t o th e body surfac e andb y large r bubble s actin g on th e under-surfac e o f th e body , thereb y reducin g th e specifi c gravity andcausin g i t t o rise. Onc e at

th e surface , surfac e counter

cunents , norma l t o th e barrie r lin e wil l ten dt o driv e th e shrimp s alon g th e angle dbarrie r t o safety

. Th e sam e principl e ma y appl y to smal l fishan dha s bee n use din th e former USS R a s amean s o f

excludin g ver

y smal l fish(<3 3 mm

) fro mintake s (Pavlov , 1989)

. Th e differenc e in th e effectivenes s o f th e bubbl e barrie r

betwee n dayligh t

an ddarknes s i s of practica l consequence . Catche s at night without th e bubbl e curtai n wer e 2. 4 time s higher tha n daytim e catche s fo

r fish, and2 7 time s higher fo r shrimps

. Sinc e th e majorit y of fish an dshrimp s ar e caught

over th e autum

n andwinter

seasons , when da

y lengt hi s short , any systemwhic hi s goin g t o b e effectiv e at reducin g catche s o f

thes e organism s mus t

wor k at night

. Give n seasonal informatio n on catc hrate s andda y lengt hi t i s possibl e t o calculat e th e overal l annual effectivenes s o f abubbl e curtain , assumin g asimila r catc hcompositio n t o that i n th e trial

. In Tabl e 6 ar e shown th e monthly catche s at Heysham , a s proportion s o f th e annual total

. Thes e wer e derive dfro mHeysha

m1 dat agive n b y Turnpenn y an d Henderso n (1992)

. Als o show n ar e daylengt hdat aan dpredicte ddaytim e an dnight-tim e 'control ' catche s of

fish(al l species ) andshrimp s calculate dfrommea n hourl y rate s give n i n Tabl e 5 , multiplie db y th e monthly proportions

. Predicte dvalue s wit hth e curtai n operatin g wer e calculate dusin g th e reductio n rate s give n in Tabl e 5

. Compariso n o f th e summate dannual total s wit handwithou t

th e bubbl e curtai n operatin g indicat e a n annual reductio n o f

37 % for fishan d56 % for

shrimps , wit

hth e bubbl e curtain

. Car e shoul db e exercise di n th e extrapolatio n o f th e result s for

fish. Th e result s foundwer e overwhelmingl y influence db y th e predominanc e o f sprat s an dherrin g in th e catch

. Th e bubbl e curtai n wa s les s effectiv e for othe r species

. Th e overal l effectivenes s o f th e barrie r i s likel y therefore , t o b e reduce dif , at othe r times o f th e year , othe r

specie s featur e mor e prominentl y i n th e catch

. 5 CONCLUSION S 5. 1 Th e bubbl e curtai n significantly reduce dth e catc ho f fishan dshrimp s (p<0.01)

. Durin g th e trial , th e followin g catc hreduction s wer e observe dwit hth e bubbl e curtai n

FAWLE Y aquati cresearc h laboratorie s Lt dP.1 2



## operating : Flatfis h6 %

Clupeid s 31 % Gadoid s -1 % Other s 41 % Total Fis h30 % Shrimp s 28%

. Th e hig hproportio n of

clupeid s strongl y influence dth e total fishfigure

. Th e effect o n shrimp s wa s no t

expected , andca

n b e regarde da s abonus

. 5. 2 Th e finding s wit

hrespec t to catche s i

n daylight

versu s darknes s contradic t earlier findings o f

othe r researcher s mainly base don laborator y studies

. Bot

hfishan dshrimp s wer e mor e effectively exclude dat night , th e difference s bein g highl y statisticall y significant ( p
= 0.0 1 - < 0.001)

. Thi s ma y hav e been relate dto th e nocturnal behaviou r o f bot hclupeid s an dshrimps , whic hten dto ris e int o th e water colum n at night

. I t i s hypothesize dthat

th e upper level s o f abubbl e curtai n ma

y b e mor e effectiv e a t

repellin g fish, owin g t o th e highe r bubbl e volum e andsurfac e counter-curren t formation

. Shrim

p repulsio n i s almos t

certainl y physical , no t

behavioural

. I t

i s conclude dtha

t air-lif t convection , possibl y augmente db y tactil e an dauditory stimuli , wer e responsibl e for fishandshrim

p deterrence , an dthat

visual stimul i wer e unimportan t

i n thi s case . 5. 3 Th e differenc e i n performanc e o f th e barrie r

i n daylight

versus darknes s i s o f

practica l consequence . In th e absenc e o f th e bubbl e curtain , fishcatche s ros e b y afactor o f 2.4 4 at night , andshrim

p catche s b y afactor

o f 27

. A barrie r

whichwa s no t

effectiv e at

nigh t woul dtherefor e b e o f

limite dvalue , an dth e effectivenes s o f th e Heyshambubbl e curtai n at night i s awelcom e finding

. Furthermore , sinc e mos t fishandshrimp s ar e caught in th e autum n andwinter

time, when da

y lengt hi s short , th e proportional reductio n in fishand shrimp catc htake n ove r afull year , assumin g th e same specie s balanc e throughout , i s estimate dt o b e 37 % for

fis hand56 % fo

r shrimps

. In practic e th e efficac y figure for fish ma y b e lowere dat

othe r time s of th e year , owin g to th e les s prominen t contributio n o f clupeid s t o th e catch

. 5. 4 W e conside r

th e desig n andplacement o f th e bubbl e barrier , a s tested , t o b e optimize d fo r th e location

. Any further improvement s woul dinvolv e th e us e o f augmentory stimuli , sucha s sound

.
Acknowledgment s I woul dlik e t o thank

th e staf f o f Heysha m2 Powe r

Statio n for

thei r help an dco-operatio n durin g th e trials ; also , al l thos e wh o assiste dwit hth e surveys , includin g D r RJ Aston , M s A Osment , M r

J Coughlan , D r

RN Bamber

andM r J Bowsher

.

FAWLE Y aquati cresearc h laboratorie s Lt dP.1 3



## REFERENCE S Blaxter J H S andHunte r

J R , 1982

. Th e biolog y of th e clupeoi dfishes. Adv

. Mar

. Biol. , 20 , p 115-119

. Mishchenko V S an dPestryako v V N , 1986

. Proble mof protectin g fishat

wate r intakes

. Gridrotechnicheskoe , Stroitelstvo , 8 , p p 50-52

. Pavlo v D S , 1989

. Structure s assistin g th e migration s o f non-salmoni dfish: USSR

. FA O Fish

. Tech

. Pap

. 308 , Foo dandAgriculture Associatio n o f th e Unite dNations , Rome , 9 7 pp . Turnpenn y A WH , 1983

. Multipl e regressio n analysi s for forecastin g critica l fishinfluxe s at powe r statio n intakes

. J

. Appl

. Ecol. , 20 , p p 33-42

. Turnpenn y A WH an dHenderso n PA , 1992

. Desig n andtestin g specificatio n for afish deterren t bubbl e barrie r

for Heysha mPowe r Station s 1 & 2

. Report

t o Heysha

m2 Powe r Station , FAWLE Y arl Ltd , Repor t No

. FC R006/92

. Yong e C M , 1958

. Th e Se aShore

. London , Collins , p 226

.

FAWLE Y aquati cresearc h laboratorie s Lt d

# Figur e 1

Th e Lin e of

th e Installe dBubbl e Barrie r P.1 4

Stag * 1 Incak e

Scag e Z IncaV e 

# Plat e 1 Th e Bubbl e Barrie r

i n Operatio n

,' v : 

# r'$&

. th /



## /



# z. m ~-<'~j. :



# P

S . \ * ' 

# v. . *,i l



# • J J



# ••H IP.1 5



## Figur e 2 Heysha m 2 Bubbl e Bam'er Tests . 1993 : Schedul e of Wor k Dat e Tes t

o r Contro l Bubbl e

Barrie r O n Tim e 

# Bubbl

e Barrie r Of f Tim e Samplin g

Start Tim e Samplin g

Finis h Tim e 03-Fe b Arriv e an d se t u p 04-Fe b Contro l 05-Fe b Contro l 19.4 5
08-Fe b Contro l 22.0 3 

# 16.0 3 19.4 5
22.0 3 09-Fe b Tes t 22.5 2 16.5 2 22.5 2 10-Fe b Contro l 23.3 1 17.3 1 23.3 1 11-Fe b Tes t 24.1 2 18.1 2 24.1 2 12-Fe b
15-Fe b Contro l 24.5 4

Tes t 15.2 4 18.5 4
9.2 4 24.5 4

15.2 4 16-Fe b 

# Contro

l 17.0 0 11.0 0 17.0 0 17-Fe b 

# Tes t 18.1 9 12.1 9 18.1 9 18-Fe b Contro l 19.1 8 13.1 8 19.1 8 19-Fe b
22-Fe b 23-Fe b 24-Fe b 25-Fe b 26-Fe b Tes t 20.0 3

Contro l Tes t Contro l Tes t Contro l 21.4 0

22.3 5 23.3 3 22.0 7

23.0 3 14.0 3

15.4 0 16.0 7 16.3 5 17.0 3 17.3 3 20.0 3

21.4 0 22.0 7 22.3 5 23.0 3 23.3 3P.1 6



# Figur e 3 Heysha m 2 Survey , February199 3 Compositio n ofth e Fis h Catc h

87.3 %



# B yNumbe r 59.9 %
s / 

## . _ / /

\ / 

# Flatfis h Clupeid s Gadoid s • Other s

34.6 % 

# B yWeigh tP.1 7



# Figur e 4 Dail y Total s o f Fis h an d Shrim p Impinge d Wit h an d Withou t th e Bubbl e Curtai n Operatin g Fis h Impingemen t

X



## . a

o E

4 5 6 7 8 9 1 0 1 1 1 2 13 14 1

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

y 199 3 I Bubbl e Curtai n O n SH I Bubbl e Curtai n Ofl f 

# Shrim p Impingemen t

4 5 6 7 8 9 1 0 1 1 1 2 13 1 4 I S 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7

Februar y 199 3 I Bubbl e Curtain O n idH M Bubbl e Curtai n Of

fP.1 8



# Relative FishCatc

h(Standar dDeviation s fromMean

)

H- » O *—

*P.1 9



# Figur e 6 Compariso

n o f Lengt h Frequenc

y Distributions forContro l an d TestPeriods (a ) 

# HERRIN G

40 0

30 0 

### ffi tr. 

# E £5200 

## 0 2 10 0 

### LENGT H FREQUENCIE S DURIN GCONTRO LPERIO D

40 0

30 0 

### ffi t/l 

# E £3200 

## 0

10 0 

### LENGT H FREQUENCIE S DURIN GTES T PERIO D



# MEA N LENGTH : 93.3 6 m m

2 5 5 0 7 5 10 0 12 5 15 0 17 5 20 0 22 5 25 0 27 5



# LENGTH m

mP.2 0



# Figure 6 Compariso

n o f Lengt h Frequenc

y Distributions forContro l an d Tes tPeriods (b )



# SPRA T

100 0

80 0


### ffi t Q 600 

# E o O 40 0 

## fc 20 0 

### LENGT H FREQUENCIE S DURIN GCONTRO LPERIO D

2 5 

# MEA N LENGTH : 53.7 6 m m

5 0 7 5 100 

### LENGT H m

m 125 15 0

100 0



### 80 0

w 3 

### 60 0 

# E O | 40 0



### 20 0 LENGT H FREQUENCIE S DURIN GTES T PERIO D



# MEA N LENGTH : 52.7 2 m m

2 5 5 0 7 5 10 0 

### LENGT H m m 12 5 15 0P.2 1



# Figur e 6 Compariso

n of Lengt h Frequenc

y Distributions forContro l an d TestPeriods (c ) 

# WHITIN G

15 0



### ffi tn 

# E U H 

# o b fc 10 0

5 0 

### LENGT H FREQUENCIE S DURIN GCONTRO LPERIO D

15 0 

### LENGT H FREQUENCIE S DURIN GTES T PERIO D



## lo o 

# MEA N LENGTH : 143.0 2 m m ffi t/m 

## E U H 

### O 

# 6 fc 5 0P.2 2



# Figur e 6 Compariso

n of Lengt h Frequenc

y Distributions forControl an d TestPeriods (d) 

# FIV E BEARDE D ROCKLIN G LENGT H FREQUENCIES DURINGCONTRO LPERIOD 3 0


### 2 5


## ffi 20 

### tn 

## E g! 5 

# d
^1 0

12 5 15 0 17 5 

## LENGT H m m

3 0



### 2 5

2 0 

### ffi o o 

## E § 1 5 

# d fc 1 0 

## LENGT H FREQUENCIES DURINGTES T PERIOD



# MEA N LENGTH : 136.0 1 m m

5 0 7 5 10 0 12

5 15 0 17 5 

## LENGT H m m 20 0 22 5 25 0

# Figure 7

Wate r Current s Generate d b y a Risin g Bubbl e Plum e (after Pavlov, 1989)

Wate rSurfac eP.2 4



## Tabl e 1 Range s of

Environmenta

l Variable s Recorde

dDuring th e Hour s of th e Surve

y

Variabl e Temperatur e Salinit y Tida l Heigh t Win dSpee d Rang e o f Value s 6. 2 - 8.7° C 27. 9 -3 3 %o 0.7 6 - 5. 5 mabov e C D Forc e 1 - Forc e 8 Beaufor t Scal e

FAWLE Y aquati cresearc h laboratorie s Lt dP.2 5

Tabl e 2 Tota l Number s an d Weight s o f Ke y Specie s Recorde d fo r Contro l an d Tes t Periods , an d Specie s Lis t o f Non-Ke y Specie s KE YSPECIE S

Ba8 6 Dove rsol e Da b Flounde r Plaic e Spra t Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Pollac k Pout , Norwa y Pou t (bib ) San d gob y Silve ree l Hooknos e Al l othe rspecie s Scientifi c Nam e Dicentrarchus

labrax Solea solea Limanda limanda Platichthys

flesus Pleuronectes

platessa Sprattus sprattus Clupea harengus Merlangius

merlangus Gadus morhua Trisopterus

minutus Gaidropsarus

vulgaris Ciliata mustela Pollachius

pollachius Trisopterus

norvegicus Trisopterus

luscus Pomatoschistus

minutus Anguilla anguilla Agonus cataphractus Contro l Numbe r Weigh

t (g ) 

### 1 2 5 1 3 13 6 13 3 2009 2 764 3 139 6 

### 6 1 6 

### 0 22 9 

### 1 7 26 7 13 4 

### 3 6 7 99 6 3 7

8 6 7 1 372 1 147 5 6100 2 6313 9 4174 6 

### 62 7 15 8 

### 0 854 1 

### 1 8 25 7 979 4 

### 32 6 33 7 48 7 377 2 Tes t Numbe r Weigh

t (g ) 

### 0 3 3 

### 9 10 4 14 2 1349 5 556 1 145 7 

### 1 2 3 

### 1 25 3 

### 2 2 21 1 18 3 

### 8 10 3 57 0 

### 0

11 4 4 9 284 5 157 4 4097 2 4594 0 4357 1 

### 10 4 22 6 1 2 943 7 

### 3 7 7 3 773 9 

### 44 5 90 0 74 9 215 8 Combine

d Numbe r 

### 1 5 8 2 2 24 0 27 5 3358 7 1320 4 285 3 

### 7 3 9 

### 1 48 2 

### 3 9 47 8 31 7 1 1 17 0 156 6 Weigh

t (g ) 

### 3 7 20 0 12 0 656 6 304 9 10197 4 10907 9 8531 7 

### 73 1 38 4 1 2 1797 8 

### 5 5 33 0 1753 3 

### 77 1 123 7 123 6 593 0 NON-KE YSPECIE S Atlanti csalmo n Se a trou t Se a snail , commo n Dragone t Pipefish , greate r Salmo salar Salmo trutta Liparis liparis Callionymus

lyra Syngnathus

actus Stickleback , 3-spine d Gasterosteus aculeatus Stickleback , ,5-spined Spinachia

spinachia Smel t Mullet , gre y Weever , lesse r Conge ree l Lumpsucke r San d ee l Wrasse , corkwin g Lamprey , se a Bril l Topkno t San d smel t Gurnard , gre y Tadpol e fis h Se a scorpio n Bul l rou t Turbo t Pipefish , Nilsson' s Osmerus eperlanus Liza aurata Trachinus

vipera Conger conger Cyclopterus

lumpus Ammodytes

tobianus Crenilabrus

melops Lampetra

marinus Scopthalmus

rhombus Zougopterus

punctatus Atherina boy eri Eutrigla gumardus Raniceps

raninus Taurulus

bubalis Myoxocephalus

scorpius Scopthalmus

maximus Syngnathus

rostelltusP.2 6



## Tabl e 3 Tota l Numbers o f Eac h Catc h Categor y Caught , wit h an d witho t th e Bubbl e Curtai n Operatin g (Number s adjuste d fo r3 pump s running : se e text )


## Categor y
Flatfis h Clupeid s Gadoid s Others Al l Fis h Shrimp s Tota l Numbers Caugh t

Bubble s Of f 

## 30 7 2773 5 192 2 146 7 3143 1 904 9 Bubbles O n



## 28 8 1905 6 195 0 86 4 2215 8 655 2 Combine d



## 59 5 4679 1 387 2 233 1 5358 9 1560 1 Reductio n

Bubble s O n 

## 6 % 3 1 % - 1 % 4 1 % 30 % 28 %

FAWLE Yaquati cresearc h laboratorie s Lt dP.2 7



### Tabl e 4 Regression s o

f Fis h an d Shrim p Catc h o n Bubbl e Curtai n Operatio n an d Environmenta l Variable s Regressio n wit h Log-transformed Shrim p Total s Constan t St d Er r o f YEs t R Squared No . o f Observation s Degrees of Freedo m XCoefficient(s ) St d Er r of Coef . T-valu e
P Mi n Ma x Tem p 0.17 2 0.06 6 2.60 1
0.0 1 6. 2 8. 7 -2.8025 9 0.51818 5 0.60173 9 14 4 13 8 Salinit y 0.05 7 0.03 5 1.63 3
0. 1 27. 9 3 3 Ligh t 1.28 6 0.09 2 14.03 2
0.00 1 0 1 Tid e 0.14 3 0.03 2 4.51 8
0.00 1 0.7 6 5.5 0 Bubble

s -0.25 4 0.08 9 -2.86 1
0.00 5 0 1

Regressio n wit h Log-transformed Fis h Total s Constan t St d Er r of YEs t R Squared No . o f Observation s Degrees o

f Freedo m XCoefficient(s ) St d Er r o f Coef . T-valu e
P Mi n Ma x Tem p 0.06 7 0.03 5 1.92 7
0.00 1 6. 2 8. 7 0.98121 7 0.27213 5 0.40642 2 14 4 13 8 Salinity 0.03 2 0.01 8 1.75 1
0.00 5 27. 9 3 3 Ligh t 0.38 1 0.04 8 7.92 7
0.00 1 0 1 Tid e -0.04 3 0.01 7 -2.55 6
0.00 1 0.7 6 5.5 0 Bubble

s -0.17 1 0.04 7 -3.67 0
0.00 1 0 1

FAWLEYaquati c researc h laboratories Lt d

## Tabl e 5 Efficienc yo f th e Bubbl e Curtai n i n Term s o f Catc h Reduction

. Compare d fo rLigh t an d Dar k Condition s

Dayligh t Ligh t Dar k Bubbl e

Curtai n Of f O n Of f O n Fis h

Hourl yCatc h Rat e Gmea n 19 7 15 6 48 1 27 4 GS D 2. 1

2 1. 7 1. 9 Catc h Reductio n 20.8 % 43.0 % Shrimp s

Hourl yCatc h Rat e Gmea n 3. 8 4. 2 10 4 4 4 GS D 2. 3

3. 3 3. 6 4. 6 Catc h Reductio n -10.5 % 57.7 % 

## Note : thi s analysi s i s base d o n 8 4 hourl ysamples , hal f take n i n dayligh t an d hal f i n darknes s th e numbe ro f sample s fo reac h o f th e samplin g hour s 1 - 6 wa s equalize d t o eliminat e an y tida l bias

. Gmea n = geometri cmean , G S = geometri cstandar d deviatio n
Studen t t-value s an d Probabilitie s tha t Geome l FIS H Off/Ligh t On/Ligh t Off/Dar k On/Ligh t

0.5 3 N S

- 

## Off/Dar k

5. 1 ** * 5. 9 ** *

- 

## On/Dar k

2. 3 * 3. 0 * * 3. 1 * * tri e Mean s ar e th e Same : SHRIMP S Off/Ligh t On/Ligh t Off/Dar k On/Ligh t

0.0 7 N S

- 

## Off/Dar k

9. 2 ** * 8. 3 ** *

- 

## On/Dar k

6. 6 ** * 7. 0 ** * 2. 1 * 

## N S = no t significant

. * = p<0.0 5 # #

_ 

## p<0.0 1 ***



## _ 

## * = p < 0.00 1

FAWLE Yaquati cresearc h laboratorie s Lt d

## Tabl e 6

Predicte d Fis h an d Shrim p Catche s ove r a Year . Takin g Accoun t of Variation s i n Daylengt h an d th e Bubbl e Curtai n Efficac y i n Dayligh t versu s Dar k Condition s

Mont h Januar y February Marc h Apri l Ma y Jun e Jul y Augus t Septembe r Octobe r Novembe r Decembe r Total s Proportio n

o f Annua l Catc h 0.0 8 0.1 0 0.0 6 0.0 5 0.0 6 0.0 6 0.0 6 0.0 7 0.0 3 0.2 0 0.1 7 0.0 7 Mea n Hours

of Dayligh t 8.0 8 9.8 7 11.3 8 14.0 0 15.8 0 16.8 0 16.4 0 14.7 5 12.7 0 10.6 0 8.8 0 7.8 0 Predicte d Fis h Catc h (Numbers) Day Catc h Contro l 377 0 575 6 398 2 435 5 522 2 555 2 573 9 630 9 197 5 1236 4 889 6 333 6 6725 7 Nigh t Catc h

Contro l 1813 6 2012 1 1078 3 759 5 661 7 581 0 649 4 966 0 429 1 3816 4 3751 8 1691 7 18210 5 Day Catc h

Curtai n 298 6 455 9 315 4 344 9 413 6 439 7 454 5 499 6 156 4 979 3 704 6 264 2 5326 7 Nigh t Catc h

Curtai n 1033 8 1146 9 614 6 432 9 377 2 331 2 370 1 550 6 244 6 2175 3 2138 5 964 3 10380 0 Predicte d Annua l Reductio n i n Catc h wit h Bubbl e Curtai n Operating : 37.0 % Predicte d Shrim p Catc h (Numbers ) Day Catc h Contro l 7 3 11 1 7 7 8 4 10 1 10 7 11 1 12 2 3 8 23 9 17 2 6 4 129 7 Nigh t Catc h Contro l 392 1 435 1 233 1 164 2 143 1 125 6 140 4 208 9 92 8 825 2 811 2 365 8 3937 4 Day Catc h

Curtai n 7 3 11 1 7 7 8 4 10 1 10 7 11 1 12 2 3 8 23 9 17 2 6 4 129 7 Nigh t Catc h Curtai n 165 9 184 0 98 6 69 5 60 5 53 1 59 4 88 3 39 2 349 0 343 1 154 7 1665 5 55.9 %



## FAWLE Yaquati cresearc h laboratorie s Lt dP.3 0



## APPENDI

X 1
Ra w DataShPrt

c

FAWLE Y aquati cresearc h laboratorie s LtdP.3 1



# FAWLEYaquati c researc h laboratories Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date

. | 4/2/93 | Start Time ["T2l0 | Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Staff\ AT / RJ A Hours of daySght (durin g sampling ) Of f V n/ a O n n/ a Physical Measurements Wate rTemperature | 6.5 1 Salinity(ppt ) | 28. 3 [ Tidal State | 0844 | H W Tim e | 15.36|lWTim e C W Pumps

Running

Fish Catch ~8l]HWHt(m ) | 2llLWHt(m )

1 V Tic k fo ro n Stag e 2 V 3 V 1 4 V 1

X 2 X Stag e 2 3 V 4 V (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norher n Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Seatrou t Smel t Sandee l Othe rsp p Tota l flatfis h Tota l dupekt e Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

5 2

1 2 1 2

2

7

1 1 2 0 6 4 2 1 4 2 1 t W t

11 4 18 2 35 6

4 1

25 0

37 9 5 8 0 29 6 64 7 39 2 N o

2 4 8 7

6

0 3 2 1 3 0
2 2 W t

3 3 9 5 23 9

30 2

0 12 8 54 1 0 N o

1 2 7 2 4

3 1 2 9 4 3 1 1 3 W t

2 6 0 1 4 9 6

4 2 7 4 9 6 4 N o

1 2 5 2 1 1

1

1 1 7 1 4 6 2 9 4 W t

3 6 2 6 3 t

4 0

2 8 6 3 6 8 7 1 1 6 N o

7 7 2 1 2

1

1

1 0 0 9 8 4 1 0 2 7 8 6 W t

15 0 270 2 9

2 1

12 6

1 8 0 42 0 17 6 1 8 N o
1 1 19 7 10 2 3

1

3 2 29 9 4 3 6 W t
3 1 2 56 0 79 1 5 5

5 7

1 1 5 135 1 11 2 1 T o N o 0 0 1 1 2 40 2 16 6 2 9 0 0 0 3 0 0 0 0 1 6 0 0 0 1 2 3 2 3 4 56 8 4 8 2 9 5 8 2 ta l W t 0 0 3 3 1 4 97 9 135 8 80 6 0 0 0 6 2 0 0 0 0 77 5 0 0 0 37 9 7 1 6 2 9 2 0 233 7 164 3 43 1 3. 7 60.6 8PJ>2^



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS

Data Recordin g For m Date Start rum. S/2/93 I Sfaf f AT/RJ A

Of f V 

### n/ a O n 

### n/ a R400 I Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperatur e | 6. 8 [ Salinit y(ppt ) | 28.1 1 Tidal State | 09.39 | H W Tim e | 16.3 4 L W Tim e CW Pumps Running Tic k

fo ro n Hour s of daylight (durin g sampling )

jBXJ§HWHt(m ) r~T4lLWHt(m )

1 V 2 V Stag e 3 V 1 4 V 1

X 2 X Stag e 3 V 2 4 V Fish Catch (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Spra t Herrin g Whitin g Co d Poo rco d Rockling , 3- B RocMmg,5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa y Pou t (bib ) San d gob y Silve ree l Hooknos e Sandee l Topkno t Trou t Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

2 2 15 5 5 1 0 2 2

6

1 3 4 16 0 2 0 1 3 2 5 1 W t

4 3 1 3 20 0 4 0 39 5 7 20 5

28 5

2 3 5 6 24 0 89 2 2 3 N o

1 6 4 6 4

2
2 1 7 0 4 4
1 2 W t

2 3 8 4 14 2 11 1

9
1 2 3 22 6 11 1 1 0 N o

7 4 3 6

3

0 7 7 9 0
7 3 W t

10 8 2 3 13 8

20 3

0 13 1 34 1 0 N o

6 3 4 3

1 1 9 0 6 7 3 1 1
7 4 W t

10 0 3 1 9 1

5 1 8 9 0 13 t 9 1 3 2 1 N o

1 23 1 12 9 4

1 6 1 36 0 4 7
55 2 6 W t

2 71 5 109 4 11 3

3 8 2 0 2 180 9 11 3 5 8 N o

2 24 7 200 3 1 2

3 2 44 7 6 3
86 5 6 W t

T O 91 1 155 1 10 7 3 6 0

7 1 0 246 2 17 0 7 T o N o 0 0 0 3 5 83 4 34 7 3 0 0 3 0 4 0 0 0 6 3 0 0 0 3 1 1 3 3 0 8 118 1 4 6 3 8 3 143 7 a l W t 0 0 0 6 6 2 5 211 8 288 1 95 5 0 1 0 0 26 5 0 0 0 28 5 20 3 0 0 0 1 4 1 8 3 8 6 0 0 9 1 499 9 171 8 13 0 2.2 2 106 3P.3 3



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT TRIALS
Dat a Recordin g For m Date Start Time 6/2/93 I Staff IRJA/A D Hours of daySght (durin g sampling ) Of f n/ a O n V n/ a 

# QU I Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature | 7.2 1 Salinity(ppt ) [""27^9 ] Tidal State | 10.28 ; H W Tim e 117.26 | LWTim e I 9.04|HWHt(m ) | 0.8|LWHt(m ) CW Pumps Running Tic k

fo ro n 1 V 2 V Staq e 3 V 1 4 V 1

X 2 X Stag e 3 V 2 4 V Ffef t Catch (Rs h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norher n Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Conge r Othe rspecie s Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

1 1 5 6 1 5

5

4 1 2 1
2 1 1 2 4 4 1 3 1 W t

1 8 1 1 2 0 5 6 35 9

13 0

11 2 4 3 3 79 0
2 9 7 6 60 1 82 7 N o

1 5 6 1 1 1 1

3 1 2 1 6 0 2 1 1 6 1 9 1 2 2 W t

2 0 4 5 33 0 3 9 9

14 8 3 1 9 1 0 0 6 5 58 0 3 2 N o

19 1 4 6 1

1 2 2 1 1 0 19 5 8 1 5 1 3 W t

26 5 3 4 18 2 4 8

3 8 4 1 0 1 0 0 29 9 26 8 2 4 N o

22 0 2 0 3

2

1 1 0 24 0 3 1 3
4 4 W t

31 9 10 0 12 7

2

1 2 0 41 9 12 7 1 4 N o

14 6 2 2 3
1

1 3 5 0 16 8 4 9 1 14 1 6 W t

32 0 15 9 14 5
1 2

4 8 1 0 47 9 15 7 1 3 No

3 21 6 7 6 8 1 2

6

1 0 3 29 2 1 1 1 6 3 36 4 6 W t

8 81 7 56 3 16 8 5 8 2

1 2

2 8 8 138 0 25 5 4 0 T o N o 0 0 0 1 4 79 3 13 4 4 6 0 3 1 8 0 0 0 0 8 1 3 0 9 1 5 3 0 5 92 7 6 6 7 6 7 51 4 ta l W t 0 0 0 1 8 1 9 176 1 95 7 131 1 0 5 6 1 2 31 1 0 0 0 0 29 8 2 9 0 7 0 79 0 6 1 0 3 7 271 8 198 8 95 0 5.1 8 380. 4P.3 4



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Data Recordin g For m Date Start Time 7/2/93 J Staff AD/RJ A 15^ |
Of T n/ a O n V n/ a Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature | 7. 8 j Salinity(ppt ) |~275 ] Tidal State | 11.14|HWTim e CW Pumps Running

Fish Catch Hours of dayBght (durin g sampling )

l8?l ^ IWTim e

1 V Tic k fo ro n Stag e 2 V 3 V 1 4 V 9.8|HWHt(m ) Stag e 2 0.3|LWHt(m )

1 V 2 X 3 V 4 V (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Othe rspecie s Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o 1 3 2 2 2 2 8 1 0 1 8

4 3 6 3 6 5 0 2 3 1 2 4 8 1 W t 3 14 7 7 9 3 6 23 7 20 9 6 21 5

14 8 1 0 8 1 2 22 9 27 3 57 8 9 3 N o 1
2 4 2 1 6 2 5

5

6 1 5 1 1 3 5 8 3 6 1 7 6 8 2 W t 2
5 5 5 3 23 8 99 6

16 6

20 1 2 3 4 3 5 7 29 1 136 3 3 9 N o

2 67 6 6 1 1 4

2 4 1 1 4 2 73 7 1 6 1 9 1 4 3 W t

39 2 114 2 41 3 47 0

4 6 9 1 3 1 0 39 2 155 5 51 6 3 2 N o

112 0 15 2 8

4 4
8 8 0 127 2 1 2 9 2 8 4 W t

248 6 96 4 14 8

6 8 1 2
4 0 0 345 0 21 6 5 2 N o

1 340 4 8 6

1

2 5 1 3 4 1 38 8 9 4 0
8 0 5 W t

7 81 0 34 6 17 0

5 1

7 9 1 1 10 1 1 2 7 115 6 30 0 12 4 N O

3 17 6 5 6 1 1 1

3
2 6 3 23 2 3 2 9 6 32 8 6 W t

2 3 42 4 19 0 1 5 2 9 1 4

6
4 0 2 3 61 4 5 8 4 6 T o N o 0 2 0 5 8 237 6 36 1 6 4 0 2 0 1 5 0 0 0 0 1 8 2 0 1 1 2 17 6 0 1 5 273 7 9 9 20 9 2 5 42 8 a l W t 0 5 0 53 9 16 4 495 1 238 8 200 8 0 3 5 0 44 6 0 0 0 

## 0 54 2 5 0 10 1 12 8 10 7 0 70 8 733 9 303 1 38 6 18. 5 31 7P.3 5



# FAWLEYaquati c researc h laboratories Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date | 8/2/93

I Start Time |~16\00 | Deterrent Syste m Operatin g Detail s Bubble Curtai n Soun d Syste m Physical Measurements Wate r Temperatur

e Salinit y (ppt ) Tidal State Staff IAD / R A Hours of dayBght (durin g sampling) Of f V n/ a O n n/ a


# ~M 

# H H [1159 1 H W Tim e n&57 | LWTim e Qoj]HWHt(m ) | b~lLWHt(m ) CW Pumps Running Tic k

fo r o n 1 V 2 V Stag e 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V Fish Catch (Fis h weigh t i n grams

) Samplin g Hou r Specie s Bass Dover sole Da b Flounder Plaic e Spra t Herrin g Whitin g Cod Poorco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pout (bib) San d gob

y Silve r ee l Hooknos e Othe r specie

s Tota l flatfis h Tota l clupeid s Tota l gadoids Tota l other sp p Palaemo n spp . Brow n shrim p N o

1

3 18 2 8 1 0

3

5
5 1 5 4 19 0 1 8 2 0 1 3 1 W t

5 2 6 21 8 7 2 28 7

5 2

18 6
6 3 5 8 3 1 29 0 52 5 12 1 N o
3 4 5 61 6 15 3 2 7

8

1 0 3 2 2 9 1 2 76 9 4 5 3 4
7 2 2 W t
2 2 14 2 4 0 221 6 1T2 7 72 3

37 7

38 3 3 2 9 4 2 20 4 334 3 148 3 7 4 N o

1 76 8 49 7 2 1

1 4

2 

## t l
2 8 1 126 5 3 7 2 9
2 4 3 W t

3 5 319 2 359 9 60 2

62 9

5 0 3
13 5 3 5 679 1 128 1 13 8 N O 2 1 98 4 20 0 1 4

3

3

0 3 118 4 2 0 0 2 4 0 4 W t 5 5 4 550 4 172 8 34 6

7 6

10 7

60 2 5 9 Z232 52 9 60 2 N o

67 2 32 8 2 8

4 0 100 0 2 8 4 6 6 4 5 W t

255 2 254 4 70 7

1 2 0 509 6 70 7 1 2 N o

2 40 0 9 2 1 0

3

1 2
2 0 2 49 2 1 4 2 2 2 17 6 6 W t

3 9 182 0 80 8 27 3

8 5

3 3 5
5 3 9 262 8 39 1 1 0 T o N o 0 2 3 9 8 362 2 127 8 11 0 0 0 0 3 1 0 0 0 0 2 1 6 0 7 9 6 2 2 490 0 16 2 10 9 1 1 37 9 ta l W t 0 5 2 2 27 5 6 6 1550 2 987 8 293 8 0 0 0 121 9 0 0 0 0 75 9 1 1 0 9 2 85 4 36 8 2538 0 491 6 95 7 8.1 4 280. 5P.3 6



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Data Recordin g For m Date Start Time 9/2/9 3 Staff |AD / R A

Of f n/ a O n V n/ a 

### pf6 ^ Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature | 7.8 1 Salinit y(ppt ) | 29.6 1 Tidal State [12 ^

H W Tim e [1§M

L W Tim e Hour s of daylight | 0.5

j (durin g sampling )

"lO^HWHt(m ) | OlLWHt(m ) CW Pumps Running

Fish Catch Tic k fb ro n Stag e 1 

### 1 V 2 V 3 V 4 V 1

V 2 X Stag e 3 V 2 4 V (Fis h weigh t t h grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norher n Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Ee l (Anguilla ) Othe rspp
. Tota l flatfish Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o 2 2 1 1 11 6 10 8 1 2 1 1 4

6 6 6 1 3 1 5 22 4 3 3 1 6 4 3 6 1 W t 7 3 0 9 8 234 89 4 30 6 9 69 6

15 7 1 1 6 0 3 9 5 13 5 112 8 116 8 11 5 N o 2 7 7 30 8 260 3 7 1 9

6 6 6 5 1 6 56 8 S 3 1 7 3 10 8 2 W t 5 15 4 24 6 108 0 228 0 93 2 4 35 0

21 9 1 1 6 4 4 9 40 5 336 0 150 5 12 4 N o

2 5 320 38 5 6 3

1 3
2 7 4 2 1 1 7 70 5 8 5 1 7 1 4 8 3 W t

3 6 6 2 140 0 397 5 159 2

51 6
4 4 29 1 1 3 2 0 1 9 9 8 537 5 244 3 5 2 N o

42 0 400 1 8

4

2 1 2 1 6 0 820 2 4 1 9 6 3 2 4 W t

144 8 332 8 53 8

26 1

8 8 2 2 9 8 0 477 6 88 7 3 9 N o

1 204 16 6 1 4

1

1

2 9 1 37 0 1 5 3 0 5 3 0 5 W t

9 71 2 135 2 36 9

2 4

1

3 3 9 206 4 39 3 3 4 N o

1 8 9 6 7 1 1

2

3 4

1 1 1 15 6 1 6 1 5
6 9 6 W t

1 3 28 3 54 2 27 2

6 8

13 4 1 0

2 0 1 3 82 5 47 4 3 0 T o N o 0 4 0 1 2 2 4 145 7 138 6 15 5 0 2 0 4 3 O 0 2 0 2 4 2 2 0 1 6 1 7 5 4 0 284 3 22 6 11 4 1 9 32 3 a l W t 0 1 2 0 22 9 41 9 515 7 1237 1 400 9 0 1 3 0 191 5 0 0 4 4 0 88 9 4 8 0 17 3 3 9 13 4 66 0 1752 8 687 0 39 4 14.0 6 23 9P.3 7



# FAWLE Yaquati cresearc h laboratorie s Ltd HEYSHAM

FISH DETERRENT TRIALS
Dat a Recordin g For m 

### Date 110/2/93 I Start Time [TfM Deterrent Syste m Operatin g Detail s Bubble Curtai n Soun d Syste m Physical Measurements Wate r Temperatur

e Salinit y (ppt ) Tidal State Staff AD/RJ A Hours ofdayBght (durin g sampling) Of f V n/ a O n n/ a 

# IM ~3O0 l 1 3 ^ H W Tim e f~2Cl20 | LW Tim e CW Pumps Running

Fish Catch 1

V Tic k fo r o n Stag e 2 V 3 V 1 4 V lOl l H W Ht(mm ) | 0 ^ L W Ht(mm ) Stag e 2 1 V 2 X 3 V 4 V (Fis h weigh

t i n grams

) Samplin g Hou r Specie s Bass Dover sol e Da b Flounder Plaic e Spra t Herrin g Whitin g Co d Poo r co d Rockling , 3- B Rockling , 5- B Rockling , Norhern Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d gob

y Silve r ee l Hooknos e Smelt Othersp p Tota l flatfis h Tota l clupeid s Tota l gadoids Tota l other sp p Palaemo n sp p Brow n shrim p N o

1 1

1 1 18 0 18 0 3 5


## i i

1 1 2 1
1 6 2 2 36 0 5 7 1 9 3 9 6 1 W t

21 1 25 1 66 0 T5t 6 75 0

26 0

43 9 8 9 0
10 2 46 2 217 6 144 9 20 0 N o 2 1 3 8 25 2 13 2 5 1 1 4

1 0 3 1 1 5 2 3 38 4 6 6 1 0 2 16 4 2 W t 0 41 8 4 5 80 8 106 4 154 3 4 2 20 0

33 9 8 4 9 9 4 3 46 3 187 2 212 4 15 4 N o 1 5 6 25 2 21 6 4 0 1
5

6 7

2 0 1 2 46 8 5 2 2 7 1 4 8 3 W t 3 17 5 4 3 72 4 53 9 120 7 22 4
24 5

27 5 1 9

1 3 22 1 t26 3 195 1 3 2 N o

2 1 30 4 35 6 3 0 1 1

5

1 6 3 66 0 3 7 1 6 2 8 4 W t

5 6 9 118 0 297 6 89 6 1 3 4 0

24 5

11 3 6 5 415 6 119 4 11 3 N O

1 | 1 25 6 24 8 2 3

2

7 1 3 1 2 50 4 2 5 3 9 1 16 0 S W t

39 . 2 104 0 213 1 52 5

10 2

2 0 4 5 0 4 1 317 1 62 7 7 4 N o

2 1 18 4 25 7 3 7

2

2 9 3 3 3 3 44 1 4 1 4 5 4 32 4 6 W t

6 3 4 87 2 241 6 101 5

7 3

4 0 2 1 1 5 4 5 6 7 328 8 112 8 8 1 T o N o 0 3 0 3 4 2 8 142 8 138 9 21 6 1 2 0 2 5 0 0 0 0 3 4 2 8 1 5 1 12 1 6 5 281 7 27 8 15 6 1 3 80 0 a l W t 0 3 0 96 2 35 4 528 4 1064 2 593 6 22 4 5 5 0 92 0 0 0 0 0 133 8 7 6 9 0 2 3 9 9 36 6 131 9 1592 6 847 3 65 4 9.6 2 59 2P.3 8



# FAWLE Yaquati cresearc h laboratorie s Ltd HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date 111/2/93 I Start Time |laT 3 Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature | 7.6 1 

### Salinit y(ppt ) ["163 1 Tidal State | 14.09|HWTim e CI V Pumps

Running

Tic k

fo ro n Staff AD/RJ A Hour s ofdayBght (durin g sampling ) 

### Of f n/ a On V n/ a

1*2101 ] L W Tim e | 9.7[HWHt(m ) | 0.7lLWHt(m )

1 V 2 V Stag e 3 V 1 4 V 1

V 2 X Staqe 2 3 V 4 V Fish Catch (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norher n Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o 1 7 4 9 7 6 2 2 3

9

8 3 5 1 3 1 2 15 9 4 0 2 1 2 7 2 1 W t 3 27 9 8 5 254 52 4 60 3

39 6

25 6 1 0 2 8 5 1 36 7 77 8 125 5 8 9 N o 1 5 1 1 18 6 9 9 4 1 1 5 1 0

9 3 1 2 6 1 7 28 5 6 6 3 0 2 18 8 2 W t 4 13 5 7 5 45 4 101 2 104 7 25 5 4 4 36 3

31 9 4 4 9 5 21 4 146 6 202 8 10 3 N o

1 4 220 9 4 4 4 1 7

6 5 1 2 0 5 31 4 5 8 2 6 2 4 0 3 W t

3 2 1 2 60 6 850 121 1 1 5 18 7

1 5 1 7 3 5 6 4 4 145 6 142 8 7 6 N o

1 24 6 9 8 3 0

2 9 1 1 0 1 34 4 3 2 2 0 6 2 8 4 W t

7 82 8 91 8 70 9

11 1 2 3 2 3 1 7 174 6 820 5 6 N o

3 21 6 16 0 5 5 2 1

4 1 9 2 2 7 3 37 6 6 2 4 8 2 3 6 5 W t

9 2 83 6 137 2 146 7 1 0 1 2

22 9 3 8 6 2 2 9 2 220 8 171 8 6 6 N o

2 3 13 8 9 0 2 8 1 2

1 6
1 1 5 22 8 3 2 1 7 2 12 6 6 W t

2 6 6 39 8 744 75 5 5 4 8

5 6 1 1
3 2 3 2 114 2 864 4 3 T o No 0 2 0 1 5 2 6 110 3 60 3 22 1 1 9 0 2 9 0 0 0 0 3 0 4 5 0 1 0 10 7 4 3 170 6 290 16 2 1 6 490 a l W t 0 7 0 47 2 27 7 337 6 542 0 579 2 25 5 7 4 0 100 6 0 0 0 0 98 6 10 3 0 4 3 28 7 75 6 879 6 811 3 43 3 11.8 4 362. 6P.3 9



# FAWLEYaquati c researc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date 112/2/93

1 Start Time |!&50 l Deterrent System Operatin g Detail s Sfa/rrAD/RJ A Hours of daytght (durin g sampling)
Bubble Curtai n Soun d Syste m Of f V n/ a O n n/ a Physical Measurements Wate r Temperatur

e | 7.5 | Salinit y (ppt ) r~304 l Tidal State | 14.541 H W Tim e I 21.-43 J LWTim e CW Pumps Running

Fish Catch jjHWHt(m ) r~14"lLWHt(m )

1 V Tic k fb r o n Stag e 2 V 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V (Fis h weigh

t i n grams

) Samplin g Hou r Specie s Bass Dover sol e Da b Flounder Plaic e Spra t Herrin g Whitin g Cod Poor co d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pout (bib) San d gob

y Silve r ee l Hooknos e Othe r sp p Tota l flatfis h Tota l clupeids Tota l gadoids Tota l othe

r sp p Palaemo n sp p Brow n shrim p 

### No

6

9 14 2 5 3 2 0

3

7
3 1 1 1 5 19 5 3 0 1 4 3 2 8 1 W t

10 1 6 4 40 1 40 8 54 6

11 5

31 0
1 1 19 8 16 5 80 9 97 1 20 9 

### No

7 8 23 8 10 4 2 2

6

4 1 2 1 3 1 5 34 2 3 2 1 6 2 3 0 2 Wt

28 0 4 0 99 7 101 0 74 8

26 4

18 0 3 9 8 7 32 0 200 7 119 2 9 9 

### No

6 9 46 8 29 0 3 2

1 2

1 7 5 2 2 3 1 5 75 8 6 1 3 0
4 0 3 . W t

15 2 19 1 121 2 245 6 104 9

55 6

75 6 1 2 1 2 5 3 34 3 366 8 236 1 7 7 N o 1 1 3 32 8 25 2 4 7

3

1 8 1 2 1 5 58 0 5 1 3 0
1 2 4 W t 4 1 9 1 5 154 0 226 2 152 4

6 9

5 t 1 9 5 2 3 3 8 380 2 164 4 4 7 N o 2 2 1 ; 68 0 59 2 2 9

6

7 3 3 2 4 5 127 2 4 2 3 0 6 16 8 6 W t 1 0 6 7 2 276 0 508 0 158 8

19 0

32 4 8 2 3 14 1 7 9 784 0 210 2 17 2 N o 2
5 32 8 36 6 6

4

3 1 1
1 0 7 69 4 1 3 2 1 6 12 0 6 W t 4
9 9 130 8 314 5 31 0

16 0

9 6 2 7
5 5 10 3 445 3 56 6 8 2 T o N o 0 5 0 2 2 3 5 218 4 165 7 15 6 0 0 0 3 4 0 0 0 0 3 9 2 8 0 1 1 10 2 6 2 384 1 22 9 14 1 1 7 39 8 a l W t 0 1 8 0 61 9 41 1 821 8 1436 1 576 5 0 0 0 135 4 0 0 0 0 171 7 6 9 0 6 0 55 7 104 8 2257 9 883 6 68 6 125 8 294. 5P.4 0



# FAWLEYaquati c researc h laboratories Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date Start Time 13/2/93 Staff [A D / RJ A

Of f n/ a O n V n/ a 

## roTo g Deterrent Syste m Operatin g Detail s Bubble Curtai n Soun d Syste m Physical Measurements Wate r Temperatur

e | 7.5

j Salinit y (ppt ) V^A Tidd State \

03.19|HWTim e | 03.59 | LW Tim e CW Pumps Running

Fish Catch Hours ot daylight | ~ 5 (durin g sampling)

1 V Tic k fo r o n Stag e 2 X 3 V t 4 V "8^HWHt(m ) Stag e 2 T§LWHt(m )

1 V 2 X 3 V 4 V (Fis h weigh

t i n grams

) Samplin g Hou r Specie s Bass j Dover sole Da b Flounder Plaic e Spra t Herrin g Whitin g Co d Poor co d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib) San d gob

y Silve r ee l Hooknos e Othe r sp p Tota l flatfis h Tota l clupeid s Tota l gadoids Tota l other sp p Palaemo n sp p Brow n shrim p N o 6

8 1 6 9 6 6 9 2 6

5

5 5 6 1 0 3 0 16 5 3 6 2 1 8 10 0 1 W t 1 8 22 0 23 6 29 4 51 2 63 5

15 1

175 1 8 3 1 5 1 47 4 80 6 96 1 10 0 N o 6 1 4 1 7 10 3 8 3 3 3 3 1 2

1 6 3 6 1 1 3 7 18 6 6 4 2 0 3 2 7 2 W t 2 3 52 2 13 0 29 6 51 2 126 4 1 2 48 3

51 4 1 2 3 5 3 1 67 5 80 8 227 3 7 8 N o 3 3 3 18 2 6 8 2 9

9

5 1 1 4 1 0 9 25 0 4 3 1 6 2 4 3 W t 1 4 13 6 2 1 50 2 68 1 86 3

30 7

15 1 4 8 7 4 0 2 5 17 1 118 3 132 1 15 6 N o



## 1 , 14 4 6 5 1 4

6

4 3 1 3 1 20 9 2 4 7 0 5 4 W t

2 1 36 9 53 0 43 0

15 5

17 6 9 4 3 2 1 89 9 76 1 1 6 N o 1
1 16 0 5 7 1 7 1 1

1
1 2 2 21 7 1 9 1 3
1 6 W t 6
1 34 0 46 3 69 0 6 7 3

3
1 2 7 80 3 76 9 1 5 NO 1

11 4 2 1 4

1

2 1 1 0 1 13 5 5 1 3 6 W t 2

22 1 19 3 21 5

3 0

4 1 9 4 5 2 41 4 24 5 6 8 T o N o 0 1 7 0 2 5 3 8 79 9 36 3 12 3 0 4 0 3 4 0 0 0 0 3 0 1 5 1 1 8 5 6 8 0 116 2 19 1 9 0 1 3 13 7 a l W t 0 6 3 0 87 8 40 9 202 2 289 1 409 7 0 1 8 0 119 9 0 0 0 0 101 6 5 0 8 7 12 9 16 7 135 0 491 3 633 0 43 3 9.6 2 101. 4P.4 1



# FAWLEYaquati c researc h laboratories Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date Start Tone 14/2/93 Staff | A D /RJ A

Of f V n/ a O n n/ a Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature | 6.9 | Salinity(ppt ) r306 l Tidal State ("0414 1 H W Tim e ROSS ] L W Tim e CW Pumps Running Tic k

fo ro n Hours of daySght (durin g sampling ) 

### al

l

]a§HWHt(m ) | 24}LWHt(m )

1 X 2 V Stag e 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V Fish Catch (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Spra t Herrin g Whiting : Co d Poo rco d Rockling , 3- B Rockling , 5- 6 Rockling , Norhe m Saith e Pollac k Pout,

. Norwa

y Pout(oib ) San d goby Silve ree l Hooknos e Othersp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o
2 7 6 7 7 3 9 3 5 1 7

3 1 3 6 1 5 11 6 4 6 1 0 1 1 3 1 W t
8 18 5 4 0 4 7 43 6 99 2 3 30 9

7 1 5 1 7 4 23 3 48 3 137 5 2 6 N o
1 8 6 11 8 3 3 3 5 1
7

1 0 2 3 6 1 5 15 1 5 3 1 1 1 4 2 W t
4 13 2 2 2 33 1 36 0 96 4 10 9
33 5

42 1 4 2 9 2 5 15 8 69 1 182 9 5 8 N o 1 3 1 18 2 7 4 2 7 1 1 4

5 1
2 5 25 6 3 8 3 1 1 3 3 W t 1 9 5 6 49 3 68 2 78 7 4 7 4 10 1

t3 0 3
1 10 2 117 5 106 9 4 N o

1 1 35 8 8 2 2 3 1 3

8 3 1 8 2 44 0 3 5 1 2
3 4 W t

2 4 5 105 6 70 7 56 9 3 9 1

25 7 1 3 5 7 2 9 176 3 92 0 2 5 N o

21 8 3 4 1 0 1 1

1

8 0 25 2 1 3 8
1 6 W t

39 5 24 6 23 4 3 2 9

1 5

5 0 64 1 28 1 5 N o 1

18 3 7 2

3

5 1 19 0 5 5
3 6 W t 3

284 4 3 4 0

18 1

9 3 32 7 22 1 9 T o N o 0 2 3 1 9 1 4 113 6 26 9 13 2 2 4 0 2 5 0 0 0 0 2 7 7 0 7 3 5 3 8 140 5 19 0 4 9 3 3 7 a l W t 0 4 1 2 43 6 7 3 260 6 247 4 358 6 15 6 1 3 0 104 6 0 0 0 0 894 2 5 0 5 1 5 1 52 5 508 0 569 5 12 7 2.2 2 27.3 8P.4 2



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date Start Time is/2/93 |



### "0924 1 Staff

TAD/RJ A

Of f n/ a O n V n/ a Deterrent Syste m Operatin g Detail s 

### Bubbl e Curtain Soun d Syste m Physical Measurements 

### Wate rTemperature Salinit y (ppt) Tidal State Hours of daylight (durin g sampling ) ALL I



# IM "305 ] | 05.24 1 H W Tim e | 12.13 ; LW Tim e | 7.5 ; H W Ht(m ) | 2.9 | LW Ht(m ) CW Pumps Running

Tic k

fo r o n 1 X 2 V Stag e 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V Fish Catch (Fis h weight i h grams ) Samplin g Hou r Specie s Bass Dove r sol e Da b Flounder Plaic e Spra t Herrin g Whitin g Cod : Poor co d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pout (bib ) San d gob

y Silve r ee l Hooknos e Othe r sp p Tota l flatfis h Tota l clupeid s Tota l gadoids Tota l othe r sp p Palaemo n sp p Brow n shrim p N o 1

3 2 9 4 2 4 5 8

2

1 4
1 2 6 11 8 6 5 3
1 3 1 Wt 3 2 3 5 7 23 8 19 1 165 4

13 5

1 7 12 0
3 1 1 8 3 42 9 192 6 1 4 N o 1 6 3 9 4 2 5 4 3

2

1 0 2 1 6 1 0 11 9 5 5 9 1 3 2 W t 5 11 6 1 8 29 9 32 1 146 6

7 8

38 3 6 5 20 0 13 9 62 0 192 7 21 1 N o

1 3 10 2 3 9 4 6

6

2

9 4 14 1 5 4 9
4 3 W t

4 1 2 4 24 6 36 6 188 3

14 5

8 5

8 6 5 61 2 211 3 8 N o

3 11 1 2 5 3 0

3

1

1 9 3 13 6 3 4 1 9 4 W t

6 19 8 19 3 122 1

6 9

2 9

5 5 6 39 1 131 9 5 5 N o

1 11 6 3 1 1 8

2

3

1 9 1 14 7 2 3 1 9
1 6 W t

3 8 26 8 19 9 55 2

3 5

10 1

6 3 8 46 7 68 8 6 N o

7 1 1 3 3

1

1
8 0 8 4 4 9
7 6 W t

10 8 17 8 13 5

1 5

1
9 0 28 6 15 0 1 0 T o N o 0 2 0 1 1 1 1 58 8 15 7 19 8 0 0 . 0 1 6 0 0 0 1 2 0 3 0 2 6 3 2 4 74 5 23 5 6 8 1 2 8 a l W t 0 8 0 21 8 105 135 7 144 8 691 1 0 0 0 47 7 0 0 0 1 7 71 8 7 0 8 28 9 33 1 280 5 812 3 30 4 0.7 4 20.7 2

### P.4 3



# FAWLE Yaquati cresearc h laboratorie s Ltd HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recording . For m Date Start Time 16/2/93 Staf f [AD/lRJ A

Of f V n/ a O n n/ a 

## rrroo i Deterrent Syste m Operatin g Detail s Bubble Curtai n Soun d Syste m Physical Measurements Wate r Temperatur

e Salinit y (ppt ) Tidal State Hours of daylight (durin g sampling)



# M 30. 8 06lB l H W Tim e | 13.49 1 LW Tim e 1 7.4 | H W Ht(m ) [ 2.9 j LW Ht(m ) CW Pumps Running

Fish Catch Tic k fo r o n Stag e 1 

### 1 X 2 V 3 V 4 V 1

V 2 X Stag e 2 3 | 4 V | V (Fis h weigh

t i n grams

) Samplin g Hou r Specie s Bass Dover sol e Da b Flounder Plaic e Spra t Herrin g Whitin g Cod Poor co d Rockling , 3- B Rockling , 5- B Rockling , Norher n Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d gob

y Silve r ee l Hooknos e Othe r sp p Tota l flatfis h Tota l clupeid s Tota l gadoids Tota l other sp p Palaemo n sp p Brow n shrim p N o 1

1 5 11 4 4 7 4 2

1

1 4

6 7 16 1 4 8 6
7 1 Wt 5 1 9 2 2 28 1 32 1 121 0

1 9

1 2 14 1

1 2 4 6 60 2 138 2 1 2 N o 2 2 3 12 8 4 7 3 3

1 2

8 7 17 5 4 5 8 1 T 2 W t 1 0 1 6 2 1 38 8 56 0 80 1

35 4

3 4 7 94 8 115 5 3 N o 1 2 3 22 8 7 5 2 7

1
1 6 1
1 3 6 30 3 3 5 1 4 2 3 3 W t 3 1 3 2 5 61 6 77 0 80 9

4 6
1 1 26 7 3
8 1 4 1 138 6 113 3 8 4 N o

1 31 6 6 4 2 8

2

3
1 1 6 1 38 0 3 3 1 7
2 4 W t

1 0 79 1 64 2 96 7

13 0

11 1
1 1 8 1 0 143 3 120 8 1 9 N o

1 31 6 10 8 2 7

4

4 4
3 1 1 42 4 3 5 3 5
1 5 6 W t

5 81 5 87 4 69 8

25 5

15 7 1 5
1 6 5 168 9 111 0 3 1 N o

15 4 3 8 9 1 1

1 1 1 5 0 19 2 1 t 1 7
6 6 W t

1 2 37 8 30 7 26 2 8 13 4

3 7 1 4 1 2 68 5 40 4 2 4 T o N o 0 4 0 6 1 2 125 6 37 9 16 6 0 1 0 9 0 0 1 1 2 9 6 0 2 8 9 2 2 163 5 20 7 9 7 3 4 0 a l W t 0 1 8 0 5 8 8 5 326 9 347 4 474 7 0 8 0 58 4 0 0 1 1 1 2 103 0 2 1 0 1 8 13 4 16 1 674 3 639 2 173 22 2 29. 6P.4 4



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Data Recordin g For m Dare Start Time 17/2/93

1216 1 Staff

AD/J C

Of f n/ a O n V n/ a Deterrent Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements 

### Wate rTemperatur e Salinit y (ppt ) Tidal State Hours of daylight [ 5 | (durin g sampling )



# 3 3 la g 108.13 1 H W Tim e | 15.08 ; LWTim e 1 7.7jHWHt(m ) | 25[LWHt(m ) CW Pumps Running Tic k

fo r o n 1 X 2 V Stag e 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V Fish Catch (Fis h weigh t i n grams

) Samplin g Hou r Specie s Bas s Dove r sol e Da b Flounder Plaic e Spra t Herrin g Whitin g Co d Poor co d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pout (bib) San d gob

y Silve r ee l Hooknos e Othe r sp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l other sp p Palaemo n sp p Brow n shrim p N o 2

1 1 8 2 7 3 3 5

6

1 2 2 3 4 15 5 4 2 7 3 1 3 1 Wt 1 1 9 2 33 5 49 4 119 0

18 3

1 4 28 5 7 9 4 2 2 82 9 138 7 38 6 N o 2 4 7 19 2 145 4 3

6

1 5 4 1 2 2 1 3 33 7 5 5 2 7 2 2 8 2 W t 6 17 1 3 6 61 8 118 2 144 1

19 1

1 6 15 4 1 0 6 3 6 21 3 180 0 180 2 5 2 N o 1 1 1 20 4 30 7 6 9

5

1 0 1
6 3 51 1 8 4 7
4 3 W t 6 6 4 98 2 255 3 89 7

8 2

33 8 3
2 5 1 6 .353 5 131 7 2 8 N o

0 0 0 0 4 W t

0 0 0 0 N o

1 19 2 34 1 4 6

3

2 2
1 8 1 53 3 5 1 2 0 1 4 5 W t

2 9 65 2 255 2 178 4

6 0

12 3 4
8 4 2 9 320 4 196 7 8 8 N o

12 3 5 6 6

3 1 1 1 4 0 17 9 6 1 9 1 7 9 6 W t

20 2 39 3 16 4

5 8 2 3 0 5

. 0 59 5 16 4 12 2 T o N o 0 5 0 7 9 79 3 92 2 19 9 0 0 0 2 0 0 0 0 1 1 8 1 0 3 4 6 3 2 1 171 5 23 8 8 0 7 12 8 a l W t 0 2 3 0 21 5 4 2 278 9 717 4 547 6 0 0 0 51 6 0 0 0 1 6 62 9 2 2 36 7 4 3 24 4 28 0 996 3 663 7 67 6 5.1 8 94.7 2P.4 5



# FAWLE Yaquati c researc h laboratories Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date 118/2/93 I Start Time | 1318

1 Staf

f 1AD/J C

Deterrent Syste m Operatin g Detail s Hours of daylight | 4 1 (durin g sampling)
Bubble Curtai n Soun d Syste m Of f n/ a 

### O n n/ a Physical Measurements Wate r Temperatur

e | 8.5

j Salinit y (ppt ) [~30 ^ 77da/ Stat e [09 ^ H W Tim e 1 16.07 ] L W Tim e CW Pumps Running

Tic k

fo r o n Stag e 1

Fish Catch (Fis h weigh t i n grams

) 1 X 2 V 3 V 4 V 1

V 2 X 3 V 4 V T% H W Ht(mm ) | 2. q LW Ht(mm ) Stag e 2

Samplin g Hou r Specie s Bas s Dove r sol e Da b Flounder Plaic e Spra t Herrin g Whitin g Cod Poor co d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pout (bib) San d gob

y Silve r ee l Hooknos e Othe r sp p Tota l flatfis h Tota l clupeid s Tota l gadoids Tota l othe r sp p Palaemo n sp p Brow n shrim p N o
1

4 1 6 4 3 2 2 7

5

1 0 6 9 6 3 2 1 0 1 6 t Wt
5 6 2 1 3 13 1 21 8 91 8

23 3

8 8 0 34 9 115 1 8 N o 1 3 3 4 4 4 2 2 7 2 2

8

6 7 8 6 3 9 6 5 4 2 W t 4 7 4 8 9 6 57 4 78 2 2 1 6 1

31 2

1 5 8 6 67 0 117 6 1 5 N o 1

11 2 5 3 3 1 1
5

6

7 0 16 5 4 3 7
6 3 W t 3 7

27 1 44 4 99 8 3 2
10 8

25 3

5 0 71 5 139 1 5 N o

1 14 1 10 8 3 2 1 5

6 1
1 1 1 24 9 4 4 1 2 1 9 4 W t

8 50 0 91 6 96 5 1 1 14 6

27 4 3
1 2 8 141 6 139 6 1 5 N o

1 18 9 14 4 2 4 1

1 5 1 8 1 33 3 2 6 1 4 2 12 1 6 W t

6 49 6 158 0 61 6 2 1

5 3 9



## - 5 6 6 207 6 69 0 2 0 N o 1
1 27 2 19 6 2 0 1 2

1 1 1
9 2 46 8 2 4 2 0 2 46 4 6 W t 5
6 68 0 151 8 62 2 7 7 6

4 4 2 4
1 8 1 1 219 8 74 9 4 2 T o N o 1 2 1 8 6 82 2 57 5 16 1 1 5 0 1 4 0 0 0 0 2 7 1 7 0 1 5 1 1 7 139 7 20 8 6 9 1 1 61 0 a l W t 3 7 9 5 14 2 3 5 217 4 525 0 490 1 3 2 6 0 0 39 1 0 0 0 0 116 9 3 6 0 5 6 4 19 1 742 4 655 3 10 5 8.1 4 451. 4P.4 6



# FAWLE Yaquati cresearc h laboratorie s Ltd HEYSHAM

FISH DETERRENT TRIALS
Dat a Recordin g For m Date Start Time 19/2/93 Staff AD/J C

Off n/ a O n V n/ a Deterren t Syste m Operatin g Detail s 

### Bubbl e Curtain Soun d Syste m Physical Measurements Wate rTemperature | 8.2 j Salinity(ppt ) f~a^ l Tidal State Hour s of daylight (durin g sampling ) 

# 3 3

lOOOlHWTIm e | 16.52 | LWTim e | 8.6;HWHt(m ) | 17lLWHt(m ) CW Pumps Running Tic k

fo ro n 1 X 2 V Stag e 3 V 1 4 V 1

V 2 V Stag e 3 V 2 4 V Fish Catch 

### (Fis h weigh ti n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- 8 Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d gob / Silve ree l Hooknos e Othe rspecie s Tota l fatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

3 2 9 9

4

1 1 1 3 0 4 1 1 4 5 6 1 5 1 W t

8 1 6 4 23 6

26 0

4 2 3 6 8 9 0 14 5 53 8 9 8 N o
1
7 6 1 7 1 0

1

2 2 1 4 1 9 3 1 3 7 2 5 1 2 W t
1
17 6 9 7 28 0

4 6

8 3 6 6 2 1 27 3 40 9 1 4 N o 1 2 2 1 13 9 2 0 1 3

1 1 3 7 6 15 9 1 4 1 1 3 3 7 3 W t 2 1 1 6 8 9 27 8 14 7 39 0

2 0 4 1 4 4 9 0 42 5 41 0 2 2 N o

8 0 3 2 5

1

1 1 0 11 2 6 2
1 6 4 W t

22 0 260 12 5

3 3

1 1 0 430 15 8 2 N o
1
17 2 13 2 1 0

2

4 2 6 5 1 30 4 1 6 1 3 1 2 5 W t
5
60 5 102 7 22 2

7 3

12 2 6 3 0 2 5 163 2 41 7 3 8
104 6 N o

2

1 43 2 21 6 1 7

2

3 3 6 3 64 8 1 9 1 2 1 6 W t

1 8 7 146 4 148 0 60 3

8 7

5 1 2 5 2 5 294 4 69 0 2 2 TO N o 0 1 4 4 2 93 1 42 6 6 4 0 0 0 1 0 0 0 0 0 8 9 0 1 5 2 6 1 1 t3S 7 8 2 5 0 2 4 116 5 a l W t 0 2 1 7 8 6 1 6 282 4 307 5 185 6 0 0 0 49 9 0 0 0 0 26 7 2 4 0 6 9 10 3 12 1 589 9 262 2 19 6 17.7 6 862 1

### P.4 7



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT TRIALS Dat a Recordin g For m Date 120/2/93 I Start Time | 14.34) Deterren t Syste m Operatin g Detail s Staff \ AD UC Hours of daytght (durin g sampling ) 2.5 1

Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperatur

e Salinit y(ppt ) Tidal State Of

f n/ a O n n/ a

8. 2 30. 1

CW Pumps Running Ta^HWTim e piTM LWTim e Tic kforo n J [ ] H WHt(mm ) 1 14 | L WHt(mm )

1 X 2 V Stag e 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V 

### Rsh catch (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Spra t Herring

. Whitin g Co d Poo rco d Rockling , 3- B Rockfing^S- B Rockling , Norhe m Saithe : Pollac k Pout , Norwa

y Pou t (bib ) San d gob y Silve ree l Hooknos e Conge r Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p N o 1 1 1 4 6 1 3 8

3

2

6 3 5 9 1 3 6 1 1 W t 3 4 4 1 4 11 2 9 6 19 7

11 3

3 3

3 6 1 20 8 34 3 3 N o

2 4 8 1 2 6 1
1

3
3 4 2 6 0 1 1 7 2 2 W t

5 8 9 1 11 3 260 2 3
7

12 0
2 1 3 5 8 204 410 2 4 N o

210 2 7 8

1 1 1 1 9 0 23 7 8 1 3 3 W t

44 0 23 1 27 4

3 6 6 5 37 5 7 0 67 1 27 4 45 6 N o

0 0 0 0 4 W t

0 0 0 0 N o
2 2 1 180 8 14 4 3 8

8

1 3 1 3 5 195 2 4 7 7 1 5 W t
1 0 7 2 9 462 0 113 6 106 7

18 7

3 2 9 2 1 9 9 1 575 6 128 6 3 0 N o 1 3 1 172 4 5 1

4

3 1 1 0 5 177 5 4 1 4 1 6 W t 2 4 2 1 234 0 54 7

7 2

4 5 288 7 0 9 T o N o 0 2 2 8 3 383 6 24 7 6 0 1 0 0 1 6 0 0 0 0 6 7 1 6 1 3 2 1 5 408 3 8 3 4 7 5 a l W t 0 5 1 0 21 6 2 4 760 3 212 3 179 8 2 3 0 0 30 7 0 0 0 0 18 5 1 9 6 6 3 0 37 5 3 2 25 5 972 6 231 3 52 2 3. 7 

### Brow n shrimp 3 8 6 7 179 2 73 2 263 8 195 2P.4 8



# FAWLEYaquati c researc h laboratories Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date Start Time 21/2/93 Staff |JC/RB ~

Of f n/ a O n V n/ a 

# nm Detenen t Syste m Operatin g Detait e Bubble Curtai n Soun d Syste m Physical Measurements 

### Wate rTemperatur

e Salinit y (ppt ) Tidal State Hours of daylght (durin g sampling) 

## 2.5

8.7 1 

### 30. 5 111 3 H W Tim e pi&Ol l LW Tim e 1 9^ 1 H W Ht(m ) ["~13 ] L W Ht(m ) CW Pumps Running Tic k

fo r o n 1 X 2 V Stag e 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V Fish Catch (Fis h weigh t i n grams

) Samplin g Hou r Specie s Bass Dover sol e Da b Flounder Plaic e Spra t Herrin g Whitin g Cod , Poor co d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib) San d gob

y Silve r ee l Hooknos e Conge r Othe r sp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe r sp p Palaemo n sp p Brow n shrim p N o

25

8 3

2

2

3 0 3 3 7 3
9 1 Wt

4 0 4 5 19 0

6 8

8 5

4 0 8 5 34 3 4 N o

3 4 6 6 3

2 3 5 2 3 2
1 2 W t

8 6 8 8 4 1 21 3

2 8 6 12 9 21 3 2 N o

12 1 7 6

1

3 0 12 8 7 3
1 3 W t

28 0 5 4 23 5

1 6

5 0 33 4 25 1 5 N o

18 9 1 1 6

3

3 1 1 1 5 0 20 0 1 2 1 7 3 9 4 W t

45 6 20 8 22 7

7 0

12 4 2 6 2 0 0 66 4 42 1 2 8 N o

2 16 6 8 2

2

2
1 1 5 2 17 4 4 1 8 t 5 2 6 Wt

4 37 0 8 3 4 6

9 8

4
23 9 1 1 4 45 3 14 4 25 4 N o

1 22 2 10 8 6

2

2

9 1 33 0 1 0 9 2 17 8 6 W t

1 68 4 33 8 14 0

4 6

3 7

4 1 1 102 2 22 3 4 T O N o 0 0 0 3 3 76 9 14 8 2 6 0 0 0 1 0 0 0 0 0 7 3 0 1 1 4 7 6 91 7 4 3 5 2 6 25 0 a t W t 0 0 0 8 6 5 191 8 76 9 105 1 0 0 0 29 8 0 0 0 0 24 6 6 0 6 23 9 4 6 9 1 268 7 159 5 29 7 4.4 4 18 5P.4 9



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date Start Time 

## ris^o i Deterren t Syste m Operatin g Detail s Staff | JC/RB/J B Hours of daylight \ 2\ (durin g sampling )
Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature Salinit y(ppt ) Tidal State 

### Ott

V 

### n/ a 

### O n n/ a

8. 4 311 1 1144 1 H W Tim e Rk^ l LWTim e 1 SL3JHWHt(m ) (~T2lLWHt(m ) C W Pump s Running Tic k fo ro n 1 X 2 V Stag e 3 V 1 4 V 1

V 2 X Stag e 3 V 2 4 V Fish Catch (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poorco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrimp : N o

2 2 2 1 7 1 4

1

8
1 2 4 2 8 2 3 3 3 4 1 W t

5 2 9 3 7 6 5 67 3

6 4

23 2
3 6 0 6 1 10 2 96 9 6 3 N o

4 5 2 1 2 1
1

4
1 1 0 4 7 1 8 2
1 3 2 W t

8 0 1 4 304 4 1
12 9

14 6
4 1 0 9 4 620 5 N o

4 40 8 7 0 3 9

. 7

8 1 0 9 1 6 4 47 8 5 4 3 5 1 36 6 3 W t

8 7 105 9 75 9 117 7

29 3

17 9 2 9 4 5 9 6 8 7 181 8 164 9 17 0 N o 2 3 1 400 11 2 2 0

5

3 1 1 1 2 9 6 51 2 2 8 3 2 3 464 4 W t 9 7 9 5 737 6 107 6 73 0

23 3

12 4 4 48 0 5 1 1 9 3 845 2 108 7 500 N o

25 6 3 2 8

1

2 1 3 1 0 28 8 9 3 4 1 3 8 6 W t

67 0 28 8 16 3

5 8

2 6 1 9 0 95 8 22 1 2 7 N o

2 1 27 2 5 8 2 1

6

1

2 2 3 330 2 8 2 2 3 9 0 6 W t

3 1 1 63 5 504 70 2

18 7

9

1 7 3 2 113 9 89 8 1 7 T o N o 0 2 0 1 1 4 140 2 28 1 11 4 1 0 0 2 1 0 0 0 0 2 4 1 3 1 1 3 10 1 1 7 168 3 160 12 8 f t 97 5 a l W t 0 9 0 24 9 1 5 985 7 270 6 374 9 4 1 0 0 964 0 0 0 0 69 0 3 5 48 0 6 3 204 27 3 1256 3 544 4 78 2 e.1 4 721. 5P.5 0



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date Start Time 23/2/93 | Staff UC I RB I JB

Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Of f n/ a O n V n/ a Hours of daySght (durin g sampling ) 1. 5

Physical Measurements Wate rTemperature | 7.8 1 Salinity(ppt ) | 31. 7 [ Tidal State | 12.15 1 H W Tim e | 18.54 | L W Tim e CW Pumps Running 

### 2 H H W Ht(m ) 

### I TT

j 

### L W Ht(m )

1 Tic k fo ro n Stag e 1 2 V 3 V 4 V 1

V 2 V Stag e 3 V 2 4 V Fish Catch (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Spra t Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

3

6 7 8 2 1 2

1
2 6 3 7 5 6 8 1 6 1 W t

1 5 13 6 6 0 7 7 6 10 3

4 2
1 0 3 2 1 5 19 6 22 8 4 2 N o

1 2 12 4 1 1 8

2

3
2 6 3 13 5 1 3 8 1 1 7 2 W t

5 8 2 7 31 7 9 7 24 4

12 7

10 0
4 6 5 8 5 41 4 47 1 5 1 N o

3 52 0 5 7 4 5

7

8 5 2 1 8 3 57 7 6 0 2 5 2 47 1 3 W t

4 8 125 0 63 4 108 0

27 0

29 5 1 4 1 3 3 4 4 8 188 4 164 5 6 1 N o
1 2 48 4 5 3 4 3

2

2 3 1 3 2 3 53 7 4 7 3 6 4 8 3 4 W t
1 2 8 2 131 2 57 7 148 4

10 1

6 4 6 4 4 7 9 4 188 9 164 9 5 7 N o

27 2 1 5 3

2

2
2 5 0 28 7 5 2 7 2 6 0 5 W t

64 3 13 4 6 7

3 7

3
1 1 0 77 7 10 4 1 4 N o

4 38 4 7 6 1 0

1

1 5
2 2 4 460 1 2 2 7 2 15 5 6 W t

8 3 124 0 76 8 18 5

2 1

5 5 1 1
1 0 8 3 200 8 26 1 2 1 T o N o 0 0 1 1 0 5 185 1 22 0 11 1 0 1 0 1 6 0 0 0 0 1 5 1 5 0 7 10 9 1 6 207 1 14 3 13 1 1 2 79 2 a l W t 0 0 1 2 27 1 4 2 489 8 227 0 313 7 0 6 0 65 9 0 0 0 0 55 6 3 4 0 7 3 13 9 32 5 716 8 435 8 24 6 8.8 8 586. 1P.5 1



# FAWLE Yaquati cresearc h laboratorie s Ltd HEYSHAM

FISH DETERRENT TRIALS
Dat a Recordin g For m Daf e Start Time 24/2/9 3 Staff JC/RNB/J B

Off V n/ a O n n/ a 

### [1535 ! Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature | 6.9 1 Salinit y(ppt ) | 310 1 Tidal State \

12.46 ; H W Tim e | 19.22 1 LWTim e C W Pumps

Running

Tic k

fo ro n Stag e 1

Fish Catch Hours ofdaySght

| 1 | (durin g sampling )

~9To l H W Ht(mm ) [ 1.2 1 LW Ht(mm )

1 X 2 V 3 V 4 V 1

V 2 X Stag e 3 V 2 4 V (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

1

10 4 1 4 1 5

3

1 2 1 3 6 1 11 8 3 0 1 0 1 1 1 1 W t

6 24 6 10 8 62 6

27 8

44 9 2 1 3 2 5 6 354 135 3 4 0 N o 1 5 2 26 6 5 6 8

4

5 1 3 1 1 8 32 2 1 7 1 5 4 9 0 2 W t 2 11 2 7 .75 5 66 6 26 8

15 2

28 3 3 1 4 3 7 12 1 142 1 70 3 5 4 N o 1 3 4 40 7 9 6 2 0

1 0

8 1 1 3 4 8 50 3 3 8 3 6 1 32 7 3 W t 3 2 4 1 2 126 1 76 9 76 1

35 7

23 6 1 5 7 2 3 9 203 0 135 4 7 8 No
2 1 2 344 3 7 2 6

4

3 6
3 3 5 38 1 3 3 3 9 2 8 6 4 W t
7 2 5 1 1 99 2 41 2 67 9

14 9

8 3 1 2
8 5 4 3 140 4 91 1 9 7 N o

1 37 7 4 5 9

2

2 1 2 1 1 42 2 1 1 2 4 7 3 2 6 W t

8 80 5 47 8 23 2

13 4

4 5 7 8 128 3 36 6 1 6 N o

2 67 6 10 1 2 5

7

2

2 3 2 77 7 3 4 2 3
500 6 W t

1 9 217 6 108 6 58 3

11 5

3 6

1 2 1 9 326 2 73 4 1 2 T o N o 0 2 2 1 2 9 217 4 34 9 10 3 0 0 0 3 0 0 0 0 0 3 0 1 1 0 8 12 8 2 5 252 3 16 3 14 7 1 5 104 6 a l W t 0 5 7 18 8 3 6 623 5 351 9 314 9 0 0 0 118 5 0 0 0 0 108 7 2 2 0 3 7 23 8 23 6 975 4 542 1 29 7 11. 1 774P.5 2



# FAWLE Yaquati cresearc h laboratorie s Lt d HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m 

### Date Start Time 25/2/93 J Staff TJC/RNB/J B

Of f n/ a O n V n/ a Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rtemperatur e Salinit y(ppt ) Tidal State Hours of daySght (durin g sampling )

7. 7 "33^ 1

CW Pumps Running

Fish Catch 13?! ^

H W Tim e \l9l\]

L W Tim e | 9.1 | H W Ht(mm ) | 1.4 } L W Ht(mm ) Tic k fo ro n Stag e 1 1 X 2 V 3 V 4 V 1

X 2 V Stag e 3 V 2 4 V (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Others Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

3 1 12 6 2 4 1 4

9

1 0 2 1 8 4 15 0 3 3 1 1 1 8 1 W t

4 8 7 29 3 20 2 49 5

22 1

46 0 6 3 8 3 5 5 49 5 117 6 4 7 N o

1 9 7 3 7 2 1

8

4 1 4 8 1 13 4 3 3 1 3 1 5 0 2 W t

7 2 20 0 27 2 63 9

260

9 3 2 3 9 9 7 2 47 2 99 2 5 0 N o

1 18 1 7 0 3 6

2

4 4
1 5 1 25 1 4 2 1 9 1 6 3 3 W t

7 49 2 56 9 134 0

3 3

15 9 8
7 7 106 1 153 2 1 5 N o
2 1 14 7 7 2 2 7

6

5 8
2 8 3 21 9 3 8 3 6 4 7 5 4 W t
7 1 0 39 3 59 5 77 6

12 3

21 3 2 0
1 9 1 7 98 8 111 2 3 9 N o
1 1 1 21 2 7 6 2 7 2 2

2 2 1 2 2 3 28 8 3 3 2 5 2 5 3 5 W t
2 1 6 9 44 0 68 8 83 8 2 3 8 0

6 3 8 1 2 6 2 7 112 8 100 4 3 5 N o

1 32 0 19 6 2 2

1

2
2 4 1 51 6 2 3 2 6 3 10 8 6 W t

2 4 84 8 166 0 52 6

3 1

2
7 2 2 4 250 8 55 7 7 4 T o N o 0 0 3 7 3 108 3 47 5 14 7 0 2 0 2 8 0 0 0 0 2 5 1 7 3 5 10 5 1 3 155 8 202 j 13 0 1 2 35 7 a l W t 0 0 9 17 0 2 3 266 6 398 6 461 4 0 2 3 0 74 8 0 0 0 0 98 8 3 8 4 6 4 0 13 6 20 2 665 2 637 3 26 0 8.8 8 264. 2P.5 3



# HEYSHAM

FISH DETERRENT

TRIALS
Data Recordin g For m Date |26/2/93 | Start Time \

17.33 | Staff

|JC/RB/J B

Of f V n/ a O n n/ a Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature Salinit y(ppt ) Tidal State Hours of daylight (durin g sampling ) 0. 5

CW Pumps Running

Fish Catch 131 ^

H W Tim e I 20.26

J L W Tim e | 8.9

j H W Ht(mm ) | 1.7

) LW Ht(mm ) Tic k fo ro n Stag e 1 1 X 2 V 3 V 4 V 1

X 2 V Stag e 3 V 2 4 V (Fis h weigh t i n grams ) Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaice

. Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d goby Silve ree l Hooknos e Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Palaemo n sp p Brow n shrim p N o

1 6

1 2 9

1

3 5 0 2 8 1 0 8 1 2 1 

### W t

2 8 29 1 26 5

2 9

2 4 8 8 0 31 9 294 11 2 N o

4 17 0 6 0 9

4

2 2
3 6 4 23 0 1 5 3 8
21 2 2 W t

10 4 35 6 43 2 22 4

19 9

4 6 4
2 1 10 4 78 8 46 9 2 5 N o 1
1 16 8 13 5 2 3

5

6 5 3 4 3 2 30 3 3 4 5 1 1 20 9 3 W t 4
9 35 6 101 4 68 0

11 5

23 5 1 4 2 0 5 3 1 3 137 0 103 0 8 7 NO

1 2 15 6 16 9 4 5

4

1 1
2 5 3 32 5 5 0 2 6 2 8 4 4 W t

1 4 2 1 42 4 138 1 124 2

16 0

2 4 3
8 8 3 5 180 5 142 6 9 1 N o
1
24 2 7 6 1 8 1 1

1
2 1 1 31 8 2 0 2 2
6 5 W t
6
48 6 56 4 71 2 1 3 2 6

2
7 6 105 0 75 1 9 N o

2 24 4 25 4 1 5

2

2 2 1 1 2 2 49 8 1 9 1 5
12 0 6 W t

4 6 65 0 101 4 38 1

4 1

1 7 3 4 2 0 4 6 166 4 43 9 2 7 T o N o 0 1 1 3 7 99 6 70 6 11 9 0 1 0 1 7 0 0 0 0 1 1 1 1 0 7 14 2 1 2 170 2 14 3 16 0 4 63 3 a l W t 0 4 6 6 0 13 4 230 0 469 6 350 4 0 1 3 0 57 0 0 0 0 0 32 2 2 6 0 4 8 27 7 204 699 6 440 9 35 1 2.9 6 468. 4P.5 4



# FAWLE Yaquati cresearc h laboratorie s Ltd HEYSHAM

FISH DETERRENT

TRIALS
Dat a Recordin g For m Date 127/2/93 ) StartTime

| 18.04

} Sfaf f |JC/RNB/J B

Off n/ a O n V n/ a Deterren t Syste m Operatin g Detail s Bubbl e Curtai n Soun d Syste m Physical Measurements Wate rTemperature I 6.2 1 Salinity(ppt ) | 31.8 1 Tidal State | 14.13|HWTim e | 20.57 ] L W Tim e CW Pumps Running Tic k

fo ro n Stag e 1 Hour s of daylight (durin g sampling )

Fish Catch (Fis h weigh t i n grams )

1 X 2 V 3 V 4 V 1

X 2 V 3 V 4 V JM5 J H W Ht(mm ) | 2.1 | L W Ht(mm ) Stag e 2

Samplin g Hou r Specie s Bas s Dove rsol e Da b Flounde r Plaic e Sprat Herrin g Whitin g Co d Poo rco d Rockling , 3- B Rockling , 5- B Rockling , Norhe m Saith e Pollac k Pout , Norwa

y Pou t (bib ) San d gob y Silve ree l Hooknos e Othe rsp p Tota l flatfis h Tota l clupeid s Tota l gadoid s Tota l othe rsp p Brow n shrim p N o

2

2 8 1 5 8

5

1 8 2 4 3 1 3 9 5 1 W t

1 8 5 3 10 9 29 2

21 6

9 5 8 1 8 16 2 50 8 6 7 N o
1 2 2 11 4 3 4 1 7

7

1 1 3 5 14 8 2 4 1 4 6 0 2 W t
1 7 7 4 1 1 23 8 24 1 59 8

29 7

4 7 10 2 47 9 89 5 1 1 N o

3 14 2 4 6 2 5

8

5 3 2 3 3 3 18 8 3 8 3 8 5 3 3 W t

16 4 33 4 46 6 72 9

42 0

11 8 6 1 4 5 0 16 4 80 0 126 7 7 0 N o

1 2 13 6 5 1 2 6

1

1 3
9 3 18 7 2 8 1 2 3 7 4 W t

6 6 3 ^30 9 39 2 70 2

2 9

2 1 4
6 6 9 70 1 75 2 1 0 N o

26 8 6 4 1 3

1

1 3
1 9 0 33 2 1 5 2 2 5 9 5 W t

57 6 56 8 51 7

2 6

4 0 6
7 0 114 4 58 3 1 3 N o

1 264 15 6 1 4

2

1 2
2 6 1 42 0 1 7 2 8 13 0 6 W t

3 0 60 0 119 2 38 3

4 9

5 0 4
1 6 3 0 179 2 48 2 2 0 T o N o 0 0 1 4 9 95 2 36 6 10 3 0 0 0 2 4 0 0 0 0 8 1 1 0 4 10 8 1 4 131 8 13 5 12 3 34 4 ta l W t 0 0 1 7 11 0 25 6 211 0 296 8 322 1 0 0 0 103 7 0 0 0 0 22 9 2 0 0 2 7 14 4 38 3 507 8 448 7 19 1 254. 6P.5 5



# APPENDI X2 Tabl e A2. 1 Dat a Use d fo r Multipl e Regressio n Analvsi s INDEPENDAN T VARIABLE S TEMP . 6. 5 6. 5 6. 5 6. 5 6. 5 6. 5 6. 8 6. 8 6. 8 6. 8 6. 8 6. 8 8 8 8 8 8 8 7. 9 7. 9 7. 9 7. 9 7. 9 7. 9 7. 5 7. 5 7. 5 7. 5 7. 5 7. 5 6. 9 6. 9 6. 9 6. 9 6. 9 6. 9 7. 8 7. 8 7. 8 7. 8 7. 8 SALINIT

Y <PPt ) 28. 3 28. 3 28. 3 28. 3 28. 3 28. 3 28. 1 28. 1 28. 1 28. 1 28. 1 28. 1 2 9 2 9 2 9 2 9 2 9 2 9 3 0 3 0 3 0 3 0 3 0 3 0 30. 4 30. 4 30. 4 30. 4 30. 4 30. 4 30. 6 30. 6 30. 6 30. 6 30. 6 30. 6 30. 8 30. 8 30. 8 30. 8 30. 8 30. 8 LIGHT/DAR K

(0/1 ) 0 0 0 0

0 0

0

0 0 0 0 0 0 0 0 0 0 0 0 TID E HEIGH T (m ) 5. 2 3. 7 2. 6 2. 6 3. 8 5. 4 5. 1 3. 3 2. 0 2. 0 3. 5 5. 4 4. 9 2. 5 0. 8 0. 8 2. 8 5. 3 5. 0 2. 7 0. 9 0. 9 2. 9 5. 4 5. 2 3. 4 2. 0 2. 0 3. 5 5. 5 5. 2 4. 1 3. 2 3. 2 4. 2 5. 4 5. 0 4. 0 3. 2 3. 2 4. 1 5. 2 BUBBLES On/Off (0/1 )

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DEPENDAN T

VARIABLE S FIS H No./hou r 13 4 6 8 5 6 4 8 16 8 46 2 29 6 12 5 12 9 11 7 55 8 68 7 23 2 86 0 133 1 121 3 103 2 53 0 45 8 48 3 56 4 71 6 57 0 53 0 25 3 40 5 86 4 66 6 134 6 73 5 18 7 23 0 30 2 48 9 27 3 21 1 18 0 23 5 35 7 43 1 49 5 21 9 C. crangon

No./hou r 3 3 2 1 11 7 39 3 8 2 1 1 1 1 11 7 82 8 3 7 2 2 4 4 0 6 4 17 6 9 6 16 4 4 8 8 16 0 32 4 2 8 3 0 4 0 1 2 16 8 12 0 1 3 4 1 3 3 1 3 7 7 3 2 1 5 6

FAWLE Y aquati c researc h laboratorie s Lt dP.5 6



## Tabl e A2. 1 (CONTINUED ) Dat a Use d fo r Multipl e Regressio n Analysi s

INDEPENDAN TVARIABLE S
TEMP . 

### 7. 8 8. 5 8. 5 8. 5 8. 5 8. 5 8. 5 8. 2 8. 2 8. 2 8. 2 8. 2 8. 2 8. 4 8. 4 8. 4 8. 4 8. 4 8. 4 6. 9 6. 9 6. 9 6. 9 6. 9 6. 9 7 7 7 7 7 7 7. 2 7. 2 7. 2 7. 2 7. 2 7. 2 7. 8 7. 8 7. 8 7. 8 7. 8 7. 8 SALINIT

Y 

## 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 30. 1 30. 1 30. 1 30. 1 30. 1 30. 1 31. 1 31. 1 31. 1 31. 1 31. 1 31. 1 3 1



## . 3 1 3 1 3 1 3 1 3 1 2 8 2 8 2 8 2 8 2 8 2 8 

## 27. 9 27. 9 27. 9 27. 9 27. 9 27. 9 27. 9 27. 9 27. 9 27. 9 27. 9 27. 9 29. 6 LIGHT/DAR K



### 0 0 0 0

0 0

0 0

0

0

0 0 TID E HEIGH T



### 5. 0 3. 6 2. 5 2. 5 3. 7 5. 3 5. 1 3. 3 2. 0 2. 0 3. 5 5. 4 5. 1 3. 2 1. 8 1. 8 3. 4 5. 5 5. 1 3. 2 1. 8 1. 8 3. 4 5. 4 5. 2 3. 5 2. 2 2. 2 3. 7 5. 5 5. 0 3. 0 1. 4 1. 4 3. 2 5. 3 4. 9 2. 7 1. 0 1. 0 2. 9 5. 3 5. 0 BUBBLES



### 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DEPENDAN T

VARIABLE S FIS H 

### 14 4 13 8 21 6 30 6 37 4 51 4 8 1 7 9 25 8 

## 100 4 100 4 179 9 5 8 6 7 57 1 57 8 33 1 38 3 15 9 36 2 58 5 45 8 45 9 82 5 4 6 28 5 42 6 40 4 36 1 53 4 4 1 5 6 21 8 43 5 18 1 31 6 8 8 10 3 76 0 

## 128 8 43 8 26 7 28 5 C. crangon

6 4 6 9 12 1 46 4 3 8 9 6 7 89 6 89 6 73 2 4 1 3 36 6 46 4 3 8 9 0 1 1 9 0 32 7 8 6 3 2 50 0 2 21 2 20 9 8 4 6 12 0 3 2 2 4 14 3 36 4 8 8 4 1 8 0 32 8 3 6


## FAWLE Yaquati cresearc h laboratorie s Lt dP.5 7



## Tabl e A2. 1 (CONTINUED ) Dat a Use d fo r Multipl e Regressio n Analvsi s

INDEPENDAN TVARIABLE S
TEMP . 

### 7. 5 7. 5 7. 5 7. 5 7. 5 7. 5 7 7 7 7 7 7 8. 7 8. 7 8. 7 7. 5 7. 5 7 7 7 7 7 7 8. 7 8. 7 8. 7 8. 7 8. 7 8. 7 8. 2 8. 2 8. 2 8. 2 8. 2 8. 2 8. 7 8. 7 8. 7 8. 7 8. 7 8. 7 7. 8 7. 8 SALINIT

Y 

### 29. 6 29. 6 29. 6 29. 6 29. 6 30. 3 30. 3 30. 3 30. 3 30. 3 30. 3 30. 4 30. 4 30. 4 30. 4 30. 4 30. 4 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 29. 9 29. 9 29. 9 29. 9 29. 9 29. 9 30. 5 30. 5 30. 5 30. 5 30. 5 30. 5 31. 7 31. 7 LIGHT/DAR K



### 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 1 0 0 0 1 1 1 0 1 TID E HEIGH T



### 2. 6 0. 8 0. 8 2. 8 5. 4 5. 1 3. 0 1. 4 1. 4 3. 2 5. 4 5. 1 3. 5 2. 3 2. 3 3. 7 5. 4 5. 0 4. 0 3. 2 3. 2 4. 1 5. 2 5. 0 3. 8 2. 9 2. 9 3. 9 5. 2 5. 1 3. 4 2. 2 2. 2 3. 6 5. 3 5. 2 3. 3 1. 9 1. 9 3. 5 5. 4 5. 1 BUBBLES



### 3. 2 1 DEPENDAN T VARIABLE S FIS H 

### 64 9 80 3 84 7 38 7 18 8 23 2 39 8 30 4 39 7 48 9 28 2 25 1 30 7 31 8 24 1 25 1 15 4 19 2 T9 3 20 8 19 2 19 0 9 7 20 8 4 3 2 40 3 40 4 40 3 20 4 6 0 11 4 19 0 12 0 33 4 68 2 4 3 6 0 13 8 22 9 19 8 35 0 9 2 15 9 C. crangon

10 8 4 8 3 2 3 0 6 9 7 2 18 8 4 0 2 8 3 6 12 6 10 0 2 7 4 5 1 1 1 3 3 4 1 1 7 1 3 2 8 4 1 4 7 9 1 5 5 1 3 7 1 6 104 6 159 2 9 1 1 9 5 2 17 8 6 1 7



## FAWLE Yaquati cresearc h laboratorie s Lt dP.5 8



# Tabl e A2. 1 (CONTINUED ) Dat a Use d fo r Multipl e Regressio n Analvsi s

INDEPENDAN TVARIABLE S TEMP . 7. 8 7. 8 7. 8 7. 8 7. 7 7. 7 7. 7 7. 7 7. 7 7. 7 6. 2 6. 2 6. 2 6. 2 6. 2 6. 2 SALINIT

Y 31. 7 31. 7 31. 7 31. 7 3 3 3 3 3 3 3 3 3 3 3 3 31. 8 31. 8 31. 8 

## 31. 8 31. 8 31. 8 LIGHT/DAR K TID E HEIGH 1 

## 1. 7 1. 7 3. 4 5. 4 5. 2 3. 3 2. 0 2. 0 3. 5 5. 4 5. 2 3. 6 2. 4 2. 4 3. 7 5. 4 BUBBLES DEPENDAN T VA R ABLE S FIS H 

## 66 5 62 3 31 9 50 3 19 8 18 1 31 3 28 0 34 9 56 6 6 7 19 1 26 7 23 0 36 9 46 6 C. crangor

47 1 8 3 6 0 15 5 8 5 0 6 3 7 5 5 3 10 8 5 6 0 5 3 3 7 5 9 13 0



## FAWLE Yaquati cresearc h laboratorie s Lt d