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Christina Luzier USFWS Columbia River Fisheries Program Office – Vancouver, WA Evaluate Habitat Use and Population Dynamics of Lampreys in Cedar Creek.

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Presentation on theme: "Christina Luzier USFWS Columbia River Fisheries Program Office – Vancouver, WA Evaluate Habitat Use and Population Dynamics of Lampreys in Cedar Creek."— Presentation transcript:

1 Christina Luzier USFWS Columbia River Fisheries Program Office – Vancouver, WA Evaluate Habitat Use and Population Dynamics of Lampreys in Cedar Creek BPA

2 Outline I.Critical Uncertainties II.Project History III.Objectives IV.Adaptive Changes V.2004 Updates VI.Future of the Project

3 Critical Uncertainties Lamprey Status: Distribution/Abundance Basic Biology/Ecology Genetic Structure Passage Survival Estimates Limiting Factors Restoration Activities Education and Outreach

4 Project Overview/History BPA Project # th year of project operations Lewis River Drainage, SW Washington Year-around field activity Staff: 3 FTEs, fish biologists

5 Location Map Cedar Creek, WA. N 5 km

6 Objectives 1.Abundance and migration timing of adults 2.Larval distribution and habitat use 3.Outmigrant abundance and migration timing 4.Spawning habitat requirements

7 Objective 1 Adults Pacific (PCL) Migration timing, biology and behavior, population estimates Method: Adult Pot traps and Adult Fish Ladder Length, weight, sex, spawning condition PIT tag, fin clip (for 2 nd mark and genetics) Mark-recapture for population estimates

8 Capturing Adults Adult LadderPot Trap

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10 Objective 1 Results Population estimates 2001 – 87; 2002 – 700; 2003 – 693 Migration timing: potentially two migration periods early summer/fall PCL

11 2001–2003 Adult PCL Movement

12 2002 Adult PCL Movement

13 Objective 1 Challenges –Population Estimation Location of marking Capture method efficiency Poor recapture efficiency PIT retention rates Equal capture of marked v. unmarked –Escapement Incomplete coverage of nest counts

14 Objective 1 Changes Pop Estimates Escapement

15 Objective 2 Larval lamprey distribution and habitat use Method: Stratified systematic point sampling technique Electrofishing –70% depletion Habitat

16 Transect 1 Transect 6 Transect 5 Transect 4 Transect 3 Transect 2 Water Flow 10 m = Sample Points Sample Site Diagram

17 Objective 2 Results Fish in relation to their habitat Stone and Barndt 2004 (J. Freshwat. Ecol.) –Highly aggregated, non-random –Negative relationship with water velocity –Positive relationship with clay, silt, sand –Backwater, depositional, side channel areas

18 Objective 2 Challenges –Low number of successes at sample points, i.e. lots of zeroes –Concerns about gear efficiency –Catchability concerns in presence areas Changes –Plans to develop sampling design to address low success rate (adaptive cluster method, etc.) –Continuation of gear efficiency work including lower densities and probability of capture

19 Gear Efficiency Challenges: Ability to get sufficient test fish for trials Substrate sterility and validation: time consuming Gear Efficiency Trials Cedar Creek 2004

20 <60 mm Ammocoetes Only Depletion model Regression correction Perfect world Gear Efficiency Preliminary Results

21 Objective 3 Outmigrant abundance and migration timing Method: 5 screw trap, 4 km upstream of mouth Length, weight, stage Tag and release Trap efficiency Trap retention

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24 Objective 3 Results

25 Ammocoete Movement

26 Macropthalmia Movement

27 2003 Am and Mac Movement

28 Objective 3 Challenges –Screwtrap upstream from majority of CDC productivity (172 nests downstream!) –consistent effort with high flow without compromising safety Changes –Section 10 permit to move screw trap to mouth of CDC –Safety –Consistent effort –Improve migration timing estimates and mark/recapture

29 Index 1 Index 2 Index 3 Index 4 Index 5 Index 6 Index 7 Objective 4 Evaluate spawning habitat requirements of adult lampreys Method: Spawning ground surveys throughout Cedar and Chelatchie Creeks

30 Pacific Lamprey Nest Dimensions Substrate Habitat type Flow #/sex Eggs present Nest longevity

31 Objective 4 Results PCL Nests ; 2002 – 124; 2003 – 109 Habitat types: Pool tail outs, runs, low gradient riffles with large gravel Appearance: Round depression, in (53-58 cm) in diameter, substrate stacked around perimeter Flow: 2-3 ft/sec

32 Objective 4 Results WBL Nests 2001 – 24; 2002 – 13; 2003 – 22 Habitat types: Pool tail outs, low gradient runs with small gravel Appearance: small gravel, 4-14 in. diameter (cattle hoof print) Flow: 1.3 ft/sec

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34 PCL Nest Construction/Digging

35 PCL Adult Video

36 Objective 3 Challenges –Moving beyond Phase 1: Collection of descriptive nest data –Phase 2: Development of predictive model of spawning habitat Changes –Improved sampling design for use and non-use data –Use vs. non-use habitat characteristics PCL–273 use/108 non-use; WBL–27 use/16 non-use

37 Continue with four Objectives Improving adult abundance estimation Continuing work on Gear Efficiency and larval depletion models Logistical analysis of screw trap move Predictive modeling of spawning habitat Juvenile spatial distribution within substrate Recruitment in Rosgen side-channels Population genetics Current Work Future Work

38 Acknowledgments BPA Howard Schaller CRFPOJen Stone Sam Lohr Bao Le Greg Silver

39 WBL Double Feature


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