Humpback Chub Aggregations Updat

Kirk Young, Mike Dodrill, Randy VanHaverbeke & Mike Pill

TWG Annual Reporting January 25, 2017
Today

• Quick Summary 2016 HBC Agg Survey R

• Closer Look at West GC HBC Expansion

• Explore Immigration & Temperature Ro
“a consistent and disjunct group

of fish with no significantexchange of individuals withother aggregations, as indicated

by recapture of PIT‐tagged

juveniles and adults and

movement of radio‐tagged

adults”
2016 Sample Locations
CPUE 

High Catch Rate at:• LCR• Pumpkin Spring

• Non Aggregation

Preliminary data; do not cite
30

LCR

BAC
 

Shin
 

SI
 

MGG
 

HC
 

P
HBC Capture TL/Freq since 2010

• 7 sites, Havasu and Below

LCR HBC Size @ Age (Aug/Sept)

YOY – 40‐60Age I – 113‐122Age II– 160‐175

(Robinson & Childs 2001)
*2010: 36 net sets, 0 HBC Havasu Creek H

2011 

2012 2013 

N = 3 CPUE: 0.18 

N = 9 

CPUE: 0.60 

N = 31 

CPUE: 0.46 

RM 157-160 2014 

2015 

N = 9 

CPUE: 0.30 

N = 4 

CPUE: 0.13 

Preliminary data; do not cite

2016 

N = 17 

CPUE: 0.59 
Fern Glen - Stairway

RM 168.5 - 172.9 

H

2016 

N = 5 

CPUE: 0.13 

2015 

N = 4 

CPUE: 0.12 

Preliminary data; do not cite

*2014: 0 HBC 
Froggy Fault

RM 196-198.5 

H

2014 

N = 11 

CPUE: 0.19 

2015 

N = 9 

CPUE: 0.30 

2016 

N = 23 

CPUE: 0.77 

*2013: 0 HBC 

Preliminary data; do not cite
Fall Canyon

RM 210 - 212 

H

2016 

N = 56 

CPUE: 1.93 

Preliminary data; do not cite
Pumpkin (2010-2013)

RM 212.5 – 216

H

2010 

N = 4 

CPUE: 0.21 

2011 

N = 1 

CPUE: 0.03 

2012 

N = 9 

CPUE: 0.09 

2013 

N = 5 

CPUE: 0.05 

Preliminary data; do not cite
Pumpkin (2014-2016) H

RM 212.5 – 216 2014 N = 42 

CPUE: 0.6 

2015 

N = 73 

CPUE: 1.04 

2016 

N = 69 

CPUE: 2.30 

Preliminary 
Bridge City

RM 237 - 244 

H

2013

N = 1

CPUE: 0.02 

2015 

N = 12 

CPUE: 0.18 

2014

N = 23

CPUE: 0.77

2016

N = 67

CPUE: 2.23 

Preliminary data; do not cite
Spencer & Surprise (2010-2011)

RM 245 - 249.5

H

2010 

N = 1 

CPUE: 0.10 

2011 

N = 3 

CPUE: 0.08 

*2012: 0 HBC 

Preliminary data; do not cite
Spencer & Surprise (2014-2016) H

RM 245 - 249.5 2014 

N = 4 

CPUE: 0.14 

2015 

N = 3 

CPUE: 0.75 

2016 

N = 52 

CPUE: 1.73 
Immigration? 

Temperature?
Immigration 

Of 79 recaptures, Havasu & below• 8 moved down from Havasu 

(3 Pumpkin; 5 Fern Glen) 

• 5 moved up from Pumpkin 

(3 Froggy; 2 Fall Canyon) 

2014-2016
Temperature (review)

Incubation Period 

Incubation prelation to w(Hamman 1

12-13 16-17 19-20 21-22

Water temperature (oC)

Egg survival 

% Survival Days 

500400300200100

0

1

0.8 

survival of H

0.6 

temperature (

0.4 0.2 

0

12-13 16-17 19-20 21-22

Water Temperature (oC) 

Egg survival Swim up fry survival 
Temperature (review)

100 

90 80 70 60 50 40 30 20 10 

0 

Larval to juvenile transition time 

10 14 

Water Temperature (oC) 

20 

Number of days took to grow larstage at differentemperatures (C2000). 

Temperature - Growth Relationship Association betw

Days 

0.6

Predicted growth (mm/day) 8 9 10 11 12 13 14 15 16 17 18 19 20 

Temperature (oC) 

0.5 and growth (mm0.4 to Age I of HBC 0.3 <0.001), bluehea0.2 P = 0.005) and fl0.1 0.0 sucker (r = 0.98, 

-0.1-0.2

(constructed from Childs 2001). 

Humpback chub Bluehead sucker Flannelmouth sucker
Mean daily temperatures (o C) 

Preliminary data; do not cite 
# Days 

≥ 19 o C at RM 246 Minimum Mean Maximum Daily Temperatures 

Year 

Preliminary data; do not cite 
Mean daily temperatures (o C) 

Preliminary data; do not cite
# Days ≥ 19 o C at RM 226 Minim

Mean Maxim

Daily Temp

Year
# Days ≥ 19 o C at RM 166 Minim

Mean Maxim

Daily Temp

Year 

Preliminary data; do not cite
Daily Temp

# Days ≥ 16 o C at RM 226 Minim

Mean Maxim

Preliminary data; do not cite Year
WGC HBC Recruitment & CPUE since 

Temp > 19 Population critical mass Food/Habitat/Translocations 

Effort 

Year N Hoop Net Set Times by Year (hours

Mean SE SD Min 

2010 65 19.73 0.26 2.09 17.22 

2011 140 18.93 0.14 1.67 6.42 

2012 202 19.04 0.21 2.94 15.50 

2013 228 19.18 0.15 2.28 16.23 

2014 231 16.91 0.06 0.86 15.28 

2015 234 17.17 0.12 1.78 14.98 

2016 216 16.94 0.06 0.82 15.37 

CPUE = Fish / Net Set 

Preliminary data; do not cite
Havasu Creek (2010-2012) Flann

RM 157-160

2011 

2012 

N = 32 

CPUE: 2.29 

N = 112 

CPUE: 1.20 

2010 N = 22 

CPUE: 0.61 

Preliminary 
Havasu Creek (2013-2016) Flann

RM 157-160 2013 

2014 

N = 556 

CPUE: 8.18 

N = 174 

CPUE: 5.80 

2015 

N = 118 

CPUE: 3.93 

2016 

N = 159 

CPUE: 5.52 

Preliminary data; do not cite
Fern Glen - Stairway Flann

2016

N = 278

CPUE: 7.37

RM 168.5 - 172.9 

2014 

N = 104 

CPUE: 6.93 

2015 

N = 181 

CPUE: 5.38 

Preliminary 
N = 398 

CPUE: 6.98 

N = 219 

CPUE: 7.50 

Preliminary data; do not cite

Froggy Fault Flanne

RM 196-198.5 2013 

N = 50 

CPUE: 3.13 

2015 

N = 187 

CPUE: 6.30 

2014 2016
Fall Canyon

RM 210 - 212 

Flann

2016 

N = 119

CPUE: 4.10

Preliminary data; do not cite
Pumpkin (2010-2013) Flann

RM 212.5 – 216

2010 

N = 19 

CPUE: 1.0 

2012

N = 245

CPUE: 2.39

2011 

N = 32 

CPUE: 0.80 

2013 

N = 248 

CPUE: 2.64 

Preliminary data; do not cite
Pumpkin (2014-2016)

RM 212.5 – 216

Flann

2014 

N = 384 

CPUE: 5.49 

2015 

N = 239 

CPUE: 3.41 

2016 

N = 401 

CPUE: 13.4 

Preliminary data; do not cite
Bridge City Flann

RM 237 - 244.99 

2013

N = 20

CPUE: 0.40

2015 

N = 96 

CPUE: 1.45 

2016

N = 246

CPUE: 8.27

2014 

N = 132 

CPUE: 4.40 

Preliminary data; do not cite
Spencer & Surprise (2010-2011)

RM 245 - 249.5 

Flann

2010 

N = 39 

CPUE: 3.90 

2011 

N = 90 

CPUE: 2.25 

2012 

N = 22 

CPUE: 0.44 

Preliminary 
Spencer & Surprise (2014-2016) Flann

RM 245 - 249.5 

2014 

N = 156 

CPUE: 7.72 

2015 

N = 10 

CPUE: 2.50 

2016 

N = 182 

CPUE: 6.10 

Preliminary 
Humpback Chub CPUEs

Preliminary data; do not cite
Flannelmouth Sucker CPUEs

Preliminary data; do not cite
Preliminary data; do not cite

Preliminary data; do not cite
Preliminary data; do not cite
Preliminary data; do not cite
Preliminary data; do not cite