Washington Department of Fish and Wildlife: Chris Donley Confederated Tribes of the Colville Reservation: Holly McLellan Presented to Fish and Wildlife Commission October 23, 2020  Monitoring ▪ Reservoir-wide surveys (WDFW) ▪ Otolith microchemistry (CCT) ▪ eDNA monitoring (CCT)  Suppression Gear ▪ Gillnets (All) ▪ Setlines (CCT) Gillnetting Setline ▪ Seines/ fyke nets (CCT/STI) ▪ Boat electrofishing (CCT/STI)

 Reward Program $10/head (CCT) ▪ Anglers can help protect Lake Roosevelt fisheries

eDNA Sampling Boat Electrofishing  Monitor population metrics and distribution to evaluate and inform suppression efforts and guide management actions ▪ Develop standardized monitoring survey ▪ Catch Per Unit Effort (NP per net) ▪ Proportion Positive Catch (PPC) ▪ Age/Size structure ▪ Sex and Maturity

▪ Condition (Wr)  Initial Surveys ▪ 2015 Pilot Study ▪ 2016-2018 BOG ▪ spring surveys Kettle Falls study area only ▪ 2017- post FWIN fall reservoir-wide  Current ▪ 2018 - fall reservoir wide ▪ 2019 - spring and fall reservoir wide ▪ 2020 ▪ spring reservoir-wide (canceled COVID-19) ▪ fall reservoir wide survey planned for Nov 2-6 3.5

Upper 3.0 Lower PPC 2.5

2.0

1.5

1.0

CPUE (Northern Pike/net)CPUE

0.5

0.0

2017 Fall 2018 Fall 2019 Fall 2015 Spring2016 Spring2017 Spring 2018 Spring 2019 Spring

Survey 2015-2019 Spring Ages 100

80

60

40 Age 1 Age 2

Proportion of the (%) Catch Age 3 20 Age 4 Age 5

0 2015 2016 2017 2018 2019 (n=22) (n=85) (n=113) (n=214) (n=106) Year  Since 2015, co-managers have removed 14,772 Northern Pike

 Majority of Pike are captured in upper half of the reservoir

 Pike are using the Kettle, Evans, Colville, Gifford areas for spawning

Redband Trout

Wild Kokanee  WDFW ▪ 2020 – Suppression efforts reduced and redirected to Lake Spokane due to Covid19 work restrictions ▪ 2021 – Planned 4 month suppression effort (March-June; 3 boats + crew/week)

 Colville Tribes ▪ 2020 – Suppression delayed due to COVID19 restrictions. Started suppression on June 1, 2020 ▪ Set 586 nets and removed 874 Pike to date ▪ 2021 – Plan 10 months (Feb-Nov) two weeks per month; 2 boats 129 Pike removed from Kettle River Oct 15, 2020 ▪ Multiagency Effort ▪ Spokane Tribe, Colville Tribes, Kalispel Tribe, WDFW, Chelan PUD, Grant PUD, National Park Service ▪ May 6th – 9th, 2019 ▪ During pike spawning; high use area Gifford to Evans ▪ 475 nets set; 448 pike removed ▪ Spring 2020 – Unable to implement “All Hands” survey due to Covid-19. ▪ Spring 2021 – Planned pre-spawn effort.  Co-manager suppression plan

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Suppression STI and CCT Gillnetting X X X X X X X X X X Gillnetting (All Hands Survey) X Electrofishing/Fyke/Setline X X X Suppression WDFW Gillnetting X X X X Gillnetting (All Hands Survey) X

Northern Pike captured in August Nets set in the Kettle River 2015 Elevation 2016 Elevation  CCT and WDFW staff 2017 Elevation 2018 Elevation share stranding data 2019 Elevation 2015 Kamloops 2016 Kamloops 2017 Kamloops 2018 Barnaby 2018 Kamloops 394 2019 Barnaby

392

390

388

386

384

382

380

378

376

374 3/20/2020 404 Pike stranded

Lake Roosevelt Elevation (m amsl) 372

370 Feb Apr Jun Aug Oct Dec $12,000  Program started in May 2017 $10,950 $10,000  6 drop off freezer locations $8,830 $8,000  $6,030 Payout received within 3 wks $6,000 $3,730  In 2020 we have given out $8,830 $4,000

 Total to date, $29,540 to anglers Payout Annual Total $2,000 $0 2017 2018 2019 2020-draft Monitoring  WDFW AIS Program monitors 385 sites state wide for Pike and quagga/zebra mussels  CCT monitors 70 sites for Pike and 10 are monitored for quagga/zebra mussels. ▪ Continue monitoring thru 2025

Findings  Kettle River - Positive 39 km upstream  Banks Lake - Positives; boat contamination?  Lower Lake Roosevelt - weak detections  Rufus Woods, Wells Pool, and - No detections Pike, Castlegar_ Woods 2019 Spokane River Pike 0.730  Used to help understand fish movements NP19-SPK-1 0.730 NP19-WOOD-7 NP19-SPK-2 NP19-WOOD-8Spokane Arm NP19-SPK-3 NP19-SPK-4 ▪ Otoliths are analyzed for the concentration 0.725 0.725 PO River of strontium isotopes PO River 0.720

Sr 0.720

86

Sr Sr/

 2019 analyzed 41 Pike 86 0.715 Roosevelt 87 Sr/ 0.715 Castlegar, BC ▪ 12 collected below Keenleyside Dam, BC 87 0.710 ▪ 24 from Lake Roosevelt and the 0.710 Kettle River 0.705 Norns Creek 0 200 400 600 800 1000 1200 1400 1600 ▪ 5 Spokane River (below Little Falls) 0.705 0 200 400Distance600 across800 otolith1000 (µm)1200 1400 1600 1800 Distance across otolith (µm)  Results indicate Pike, Castlegar_ Woods #4,5

2019 Sanpoil Pike, #1 0.726 NP19-WOOD-4 ▪ Spokane River Pike: 0.730 NP19-WOOD-5 0.724 PO River Spokane Arm ▪ All 5 Pike originated in the 0.722 0.725 0.720 PO River ▪ BC Pike- multiple life histories 0.718

0.720Sr ▪ Entire life near Castlegar Sr 0.716 86 Castlegar, BC

86 0.714 Sr/ ▪ Originated in the (shown) Sr/ Lake Roosevelt 87 0.712 87 0.715 Castlegar ▪ Moved between Castlegar and Kettle River (shown) 0.710 0.708 Kettle River 0.710 Norns Creek 0.706 ▪ Sanpoil River Kettle River 0.704 ▪ Potentially originated in PO River 0.705 0 200 400 600 800 1000 1200 0 500 1000 1500 2000 2500 3000 Distance across otolith (µm) Distance across otolith (µm)  The co-managers of Lake Roosevelt will continue to look for funding and implement suppression and monitoring through at least 2025.  At that time, the co-managers will reconvene and adaptively manage the future direction of the program.  Many thanks to our co-manager, the Spokane Tribe, and a long list of partners: