Colville Confederated Tribes Hatchery Subdivision

Hatchery SubdivisionHatchery ProjectRaise Fish

Stock lakes and streamsM&E

Twin Lakes Oxygenation

Oxygenate HypolimnionMonitor Effects

Rufus Woods Creel

Creel SurveyRelease Fish

M&E

Rufus Woods Net Pens

Raise Fish

Stock Lake

Evaluate effects of oxygenation on fish

Release Fish

Rufus Woods M&E

Release Fish

Release Fish

Reduce Hatchery Densities

Monitor Fish Releases

Hatchery Project

Primary Goals Raise fish for Reservation Waters.

Monitor Reservation waters to determine most efficient stocking strategies.

Evaluate projects that effect fish numbers/size in stocked waters.

Education and community involvement

Hatchery Accomplishments Major Reduction in Mortality Improvement in angler catch rates, average fish size and fish

quality Development of redband broodstock, evaluation and decision to

eliminate redband program Match stocking program to lake needs Improvements to hatchery water systemHatchery tours and fishing derbiesGraduate student program

Reduction in Hatchery MortalityEastern Brook Trout Program over the past years.

Brood Year # Green Eggs# Eyed Eggs # Ponded # Planted % Planted

2005 655,477 397,999 57,592 38,007 5.80%

2006 1,544,307 1,108,086 576,475 351,454 22.76%

2007 1,063,047 512,602 268,857 206,179 19.40%

2008 930,981 683,402 520,671 470,731 50.56%

2009 436,655 388,115 341,727 338,772 77.58%

2010 278,829 193,482 183,808 157,931 56.64% *

2011 260,058 234,385       **

* A large number of eggs identified were unfertilized, hatchery currently has 22,952 EBT10 on station.

** Hatchery culled 63,113 eyed eggs from population since egg mortality was very low.

Improvements to Catch Rate and Size

2007 2008 2009 2010 20110

100

200

300

400

500

600

700

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

South Twin Lake rainbow troutAnnual Catch Rate and Average Size

Ave. Size (grams)CPUE

Year

Ave

rage

Wei

ght (

gram

s)

Fish

Per

Hou

r

Redband Rainbow Broodstock Development

Broodstock collection began in 2003 First planted in 2006 100% redband plant 2009-2011 Poor hatchery performance Poor lake performance Outmigration Genetic issues Last redband plant in 2012

Matching stocking program to lake needs Eliminate stocking in Gold and Round Lakes Reduce stocking in Owhi and Twin Lakes

Year 2004

Year 2005

Year 2006

Year 2007

Year 2008

Year 2009

Year 2010

Year 2011

0

10000

20000

30000

40000

50000

60000

OWHI

Year 2004

Year 2005

Year 2006

Year 2007

Year 2008

Year 2009

Year 2010

Year 2011

0

100000

200000

300000

400000

500000

600000

700000

800000

900000

Twin LakesRedband fry

Water System ImprovementsCompleted Construction Project in October 2011

1. Installed Low Head Oxygenators (LHO’s) and Oxygen Generators

2. Bypassed Water Distribution Tower (25’) by piping directly to raceways.

3. Installed gate valves to allow flexibility in directing water and well usage.

Education programsFrequent hatchery tours for school groupsFishing derbies Graduate student program with WSU

8 MS degrees completed2 PhD degrees completed2 MS degrees in progress3 PhD degrees in progress

Monitoring and EvaluationWhole Lake Study

Detailed study in cooperation with WSU. Presently studying Owhi Lake. Previously studied Twin Lakes.

Major Lakes.Smaller stocked lakesStreamsEvaluate other related projects. Twin Lakes Oxygenation

Whole Lake StudyOwhi Lake Limnology Cyanobacteria Creel Fish numbers and condition

Major LakesTwin, Owhi, Buffalo, Omak

Goals1. Fish numbers, growth and condition2. Appropriateness of present stocking strategy3. Potential for major problem (e.g. algae bloom)Tools4. Monthly gill net survey5. Monthly hydroacoustic survey6. Creel surveys

Small LakesAll small lakes that are stocked

Goals1. Appropriateness of present stocking strategy2. Fish growth and condition

Tools3. August/September gill net survey

Results1. Substantial modification to stocking strategy.

StreamsGoalsAppropriateness of present stocking strategy

ToolsPre and post stocking electro-fishing surveys

ResultsNo fall stockingMultiple small plants instead of one large one

Project EvaluationGoalsEvaluate effectiveness of specific project (e.g. Twin Lakes oxygenation).Tools1. Gill net surveys2. Hydroacoustic surveys3. Creel surveys4. Measurement of physical parameters

Rufus Woods Creel Project

Rufus Woods Creel

BackgroundRufus Woods AquacultureStocking History State and Tribal Hatcheries Early Net Pen Releases Rufus Woods Net Pen ProjectCreel Studies

Angling Pressure Fish Origin

Study GoalsMaintain Quality FisheryDetermine Most Economic Way to Supplement

FisheryDetermine Causes of Fish LossDetermine Risk to ESA listed fish below CJD

Catch Rates and Angling Pressure

Production PotentialEcoAnalysts Study

GoalsPotential Food ResourcesDetermine What Trout are Eating

ToolsStomach sample analysisBasic Rufus Woods Background StudySuction dredgeCobble basketBathymetry

RBT stomach content analysis

Fish MovementsBattelle StudyGoals

Quantify entrainmentUnderstand fish movementQuantify effects of fish size on movements and

entrainmentTools

JSATS tags and receiversFish releases

Lake Rufus Woods and Lake Pateros Receiver Locations

The FutureContinue Creel SurveyStock Fish 1 – 3 lbsUse Rufus Woods Net Pen Project to Help

Supplement FishContinue Stomach Sample AnalysisRe-evaluate parts of Production Potential Study in

“normal” year

Twin Lakes Oxygenation Project

EvaluationQuestions to answer

1. Is lake oxygenated?2. Is hypolimnion utilized by fish?3. Is summer mortality reduced?4. Is fish growth increased?5. What are the other effects of oxygenation?

Zooplankton?Heavy metals (particularly methyl mercury)?

Oxygen Levels

0 50 100 150 200 250 300 35 0 400 450 500 550

Dista nce (m ete rs)

770

772

774

776

778

780

782

784

Elevati

on (met

ers)

G antzer W ater R esou rces Eng in eer in g , L LC (P au l.G antzer@ gm ail.com )

0 50 100 150 200 250 300 350 400 450 500 550

6.0

8.0

10.0

12.0

14.0

16.0

0.0

1.0

2.0

3.0

4.0

5.0

0 50 100 150 200 250 300 350 400 450

Dis tance (m eters)

770

772

774

776

778

780

782

784

Elevat

ion (m

eters)

0 50 100 150 200 250 300 350 400 450

G a ntze r W a te r R esou rces E ng ineering , L L C (P au l.G a n tze r@ gm ail .com )

6.0

7.0

8.0

9.0

10.0

11.0

1.0

2.0

3.0

4.0

5.0

North Twin

South Twin

Hypolimnion Utilization

Gill Net Surveys

Percentage of Angler Caught Carryover Fish

Year 2006 Year 2007 Year 2008 Year 2009 Year 2010 Year 20110

10

20

30

40

50

60

70

80

90

100

North TwinSouth Twin

Year

% C

arry

over

100% redband plant

begin oxygenation

All carryovers pre redband

ZooplanktonChaoborus densities

April May June July Aug Sept Oct Nov0

5

10

15

20

25

South TwinNorth Twin

Month

# or

gani

sms/

m3

Pelagic Chaoborus densities

April May June July Aug Sept Oct Nov0

500

1000

1500

2000

2500

3000

3500

South TwinNorth Twin

Month

# or

gani

sms/

m2

Benthic Chaoborus densities

Total Mercury in Twin Lakes Fish

RBT EBT LMB GDS0

20

40

60

80

100

120

140

Tot

al M

ercu

ry (p

pb)

The Future Oxygenate South Twin

Produce oxygen onsite

Evaluate project success

Rufus Woods Net Pen Project

Objectives Reduce rearing costs for large fish

Reduce pressure on the hatchery

Produce large fish for Rufus Woods and reservation lakes

Eggs & Fish are reared and marked at hatchery, then transported to net pen site.

Hatchery personnel assist with fish distribution from net pens (directly to Rufus Woods or by utilizing fish transport tanks).

Colville Hatchery M&E staff monitor success of fish outplants.

The Rufus Woods Supplemental Creel project staff assist in providing angler success on the Rufus Woods outplants.

Project is an extension of Colville Hatchery O&M and M&E project

Project successfully released over 37,000 lbs. of redband rainbow trout into Lake Rufus Woods and Reservation lakes in the spring of 2011.

Average fish size was 430 grams

Accomplishments

March April May0

2,000

4,000

6,000

8,000

10,000

12,000

4,965 5,219

7,614

10,029 11,248

Lake Rufus Woods= 13,329North Twin Lake= 10,029South Twin Lake= 11,248

Fish Distributed from Net Pens in 2011

Expand Project to be more cost efficient.Utilize a sterile “triploid” stock toward production.Environmental considerations; Spring runoff,

Columbia River water temperatures, and bacteria load on fish health.

Manage Lake Rufus Woods for a successful fishery?

Future Considerations

Questions?

AppendixHatchery Project

Owhi Lake August Gill net Surveys

2004 2010/2011

Ave. wt. Wr Ave. wt. Wr

387 101.6 582 105.6

Redband vs Spokane StockLocation Category Redband Spokane

Hatchery        Mortality 35% higher Lower  Feed Conversion as high as 2::1 typically 1::1  Rearing density 30% less high  Fin erosion high moderate  Spawning season spring fall

  Growth 18 months to 100 grams12 months to 100

gramsTwin Lakes        Carry over % >2% 10%  Outmigration >50% <10%  Physical condition poor in spring excellent in spring

 Presence of copepods frequent frequent

  Genetics stream derived stock triploid

  Growth153 g to 188 g over

summer183 g to 243 g over

summer

Redband vs Goldendale Growth Comparison

July

Augus

t

Septem

ber

October

Novembe

r

Decem

ber

Janua

ry

Febru

ary

March

April

MayJu

neJu

ly

Augus

t

Septembe

r

October

Novem

ber

December

0.1

1

10

100

1000

Redband Rainbow Trout Growth Comparison

BY 2006BY 2007

Month

Wei

ght i

n (g

ram

s)

Janu

aryMarc

hMay Ju

ly

Septem

ber

Novem

ber

Janu

aryMarc

hMay Ju

ly0.1

1

10

100

1000

Triploid Rainbow Trout Growth Compar-ison, 2008

BY 2005BY 2006BY 2007

Month

Wei

ght i

n (g

ram

s)

AppendixRufus Woods Creel

Monthly Angling Pressure

Augus

t

Septem

ber

Octobe

r

Novem

ber

Decem

ber

Janu

ary

Februa

ryMarc

hApri

lMay

June Ju

ly0

4000

8000

12000

Rufus Woods Angling Pressure, 2006/2007, 2008/2009, 2009/2010, 2010/2011

2006/20072008/20092009/20102010/2011

Month

Ang

ler D

ays

Location of Last Detection85

3

868

873

878

890

904

915

916

930

933

935

0

10

20

30

40

50

60All Releases

Release 1

Release 2

Release 3

Node Location (rkm)

Fina

l det

ectio

n (%

)

Rel

ease

Chi

ef J

osep

h D

am

Entrainment

Release Date n released n entrained % entrained

1 Nov. 1 99 10 10.1

2 Jan. 13 100 10 10

3 Mar. 28 94 7 7.4

All 293 27 9.2

AppendixTwin Lakes Oxygenation

Twin Lakes Hydroacoustic Passes

North Twin

South Twin

Hydroacoustic Fish TargetsTwin Lakes Hydro Acoustic Surveys, 2010

Targets

Lake Strata 6-Apr 19-Apr 10-Jun 28-Jun 28-Jul 27-Aug 22-Sep Total

  1 0 15 9 5 0 0 1 30  2 6 4 5 5 19 2 25 66

N. Twin 3 14 4 2 9 7 5 7 48

  4 3 0 5 1 1 0 29 39  5 0 0 1 6 3 6 8 24

                   

  1 0 21 2 1 0 0 2 26

  2 1 9 6 3 12 1 16 48S. Twin 3 1 0 1 9 4 0 19 34

  4 10 4 0 10 1 0 0 25

  5 0 0 0 0 0 0 0 0

Gill Net Catch RatesNorth Twin Lake Gill Net Catch Rate

  Net Depth in meters

Month 2-5m 5-8m 8-11mApril 1.3 0.7 0.0May 6.0 3.7 1.0June 2.0 4.3 0.3July 0.0 1.7 0.3August 0.0 7.0 1.7September 1.3 3.3 0.3

October 2.7 1.3 0.0

South Twin Lake Gill Net Catch Rate

  Net Depth in meters

Month 2-5m 5-8m 8-11m

April 0.3 0.7 0.0

May 1.7 2.7 0.0

June 0.3 3.3 0.3

July 0.0 1.0 0.0

August 0.0 1.0 0.3

September 0.0 0.0 0.0

October 1.3 0.0 0.0

Total Mercury in Twin Lakes Trout

Hatchery North Twin South Twin0

10

20

30

40

50

60

Rainbow Trout Brook Trout

Tota

l Mer

cury

(ppb

)

Mercury in large body zooplankton

June July August September0

20

40

60

80

100

120

140

160

180

200

North Twin South Twin

Tota

l Mer

cury

(ppb

)

Mercury levels in Twin Lakes Trout

Rainbow trout

Rainbow trout

Brook trout

Brook trout