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Sanpoil River Redband Rainbow Trout

Erick Simonsen and Holly McLellan Colville Confederated Tribes, Resident Fish Division. Sanpoil River Redband Rainbow Trout. Importance of Redband T rout. Prior to the Grand Coulee Dam 4 anadromous salmonids were present in the upper Columbia River

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Sanpoil River Redband Rainbow Trout

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  1. Erick Simonsen and Holly McLellan Colville Confederated Tribes, Resident Fish Division Sanpoil River Redband Rainbow Trout

  2. Importance of Redband Trout • Prior to the Grand Coulee Dam 4 anadromous salmonids were present in the upper Columbia River • Today 2 of these historical fish persist in their resident forms: redband trout and kokanee • Salmonid species are important to the region • Healthy ecosystem • Subsistence for regional Native American Tribes • Provide recreational harvest opportunities Chinook salmon Coho salmon Steelhead/redband trout Sockeye/kokanee

  3. Redband Trout Research • In 2009 CCT, began a redband trout stock assessment project for the Sanpoil River • Redband Technical Working Group • Coordinated effort • Redband Stock Assessment Protocol (J. McLellan and C. Lee) • Goal: To conserve, enhance and restore redband trout populations in Lake Roosevelt and its tributaries, and where appropriate provide opportunities for subsistence harvest by Native American Tribes and recreational harvest.

  4. Redband Trout Research: Sanpoil River • Major tributary to Lake Roosevelt • Sanpoil River is 103 km long • Okanogan, Colville NF and CCT Reservation • Redband Trout Stock Assessment • Determine life history types • Estimate recruitment • Estimate growth, age at maturity, and spawner escapement • Estimate harvest and describe spatial and temporal harvest characteristics. • Genetic inventory

  5. Monitoring Methods Juveniles • Screw traps: • Out-migrating juveniles captured and PIT tagged in mainstem Sanpoil • D-net • Capture emergent fry and juveniles in smaller tributaries • Back pack electrofishing • Count and PIT tag juveniles in tributaries and mainstem • PIT tag arrays • Detect movements of tagged fish

  6. Monitoring Methods Adults • Weir Traps • Capture both upstream and downstream fish • Telemetry • Radio: used while fish are in the river. • Finalized a study in 2011 • Acoustic: used while in the reservoir. • Ongoing, partnered with EWU • Creel surveys • LRFEP survey • Sanpoil River Sanpoil River weir Fishing Lake Roosevelt Acoustic tag Radio tag

  7. Sanpoil River life history types • 2009-10 study (Brown et al. 2013): • Fluvial: resident • Identified populations above barriers • Abundance below barriers unclear • Fluvial Adfluvial: most of life in river, migrate to tributary to spawn • West Fork SP, Bridge Ck • Abundance unclear • Lacustrine Adfluvial: most of life in a lake/reservoir, migrate to tributary to spawn • Spring run: migrate Feb-March; spawn April – May • Fall run; migrate August/Sept; overwinter, spawn in spring • Life history characteristic of steelhead

  8. Juvenile out-migration 2012 Data Peterson Estimate (95% CI) • Timing • Peaks just prior to freshet • Runoff unknown • Summer/fall peaks • Abundance • Monthly estimates 600 – 9,000 a month • Annually ~20,000* • Wide confidence • Age Distribution • 4 age classes • Majority age 1 and 2

  9. Juveniles Bridge Creek 2013

  10. Adult Escapement

  11. Reservoir impacts • Reservoir life • Harvest, predation, entrainment • Creel Surveys • Increase harvest during pre-spawn staging • Continued harvest throughout year • Acoustic study • Collaboration with EWU to mark 15 fish • Movements: • through out lower reservoir • 2 documented entrained • 1 harvested

  12. Summary • Continue redband stock assessment surveys in the Sanpoil River through 2017 • Increase PIT tag arrays and build a more robust weir to increase precision of estimates • Plan to implement genetics study in 2014 • Use data to address fishing regulations changes, reservoir operation issues, and assist with habitat restoration projects

  13. Acknowledgements • Colville Confederated Tribes Resident Fish staff: • Jason McLellan, Bill Laramie, Robert Thomas, Branditt West, Shay Wolvert, Todd Nanamkin, Charles Joseph, Leslie Plum, William Dick , Arkie Andrew, and numerous temporary and seasonal workers • Redband Trout Technical Working Group • Spokane Tribe of Indians staff • WDFW staff: Chuck Lee • Pacific Northwest Laboratories (PNNL) Rich Brown and staff • Bonneville Power Administration, for their support and funding Questions?

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