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Steelhead Kelt Reconditioning Program Update Presented by: Bill Bosch, Yakama Fisheries

Steelhead Kelt Reconditioning Program Update Presented by: Bill Bosch, Yakama Fisheries Acknowledgements: D. Fast, M. Johnston, T. Newsome Prosser Hatchery Crew Columbia River Inter-Tribal Fish Commission Bonneville Power Administration Pacific States Marine Fisheries Commission.

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Steelhead Kelt Reconditioning Program Update Presented by: Bill Bosch, Yakama Fisheries

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  1. Steelhead Kelt Reconditioning Program Update Presented by: Bill Bosch, Yakama Fisheries Acknowledgements: D. Fast, M. Johnston, T. Newsome Prosser Hatchery Crew Columbia River Inter-Tribal Fish Commission Bonneville Power Administration Pacific States Marine Fisheries Commission

  2. Yakima Steelhead Escapement Trends, 1984 – Present Prosser Counts Roza/Redd Counts

  3. Yakima Steelhead Abundance Trends

  4. Yakima Steelhead Adult-Adult Productivity Trend (‘gross’ estimate of age-4 recruits per age-4 spawner)

  5. Can Kelt Reconditioning be used to increase abundance and productivity?

  6. Management Scenarios • Direct Release • No-Term • Short-Term • Long-Term

  7. Chandler Kelt Collection, 2001-09 Range: 18-38% Mean : ~28%

  8. Kelt Disposition, 2001-09

  9. Short- and Long-Term Survival ofReconditioned Kelts to Release

  10. Yakima R. Steelhead Escapementwith Reconditioning 2.4% 8.4% 7.9% 6.7% 11.3% 7.4% 4.4% 5.5% Percentage increase in escapement due to reconditioning.

  11. Survival Comparison of Short- and No-Term Reconditioned Kelts to ‘natural’ Iteroparity PIT Return Rates to Bonneville Dam

  12. Relationship of Short-Term Kelt Survival to Ocean Conditions 2002 2008 Problem: Don’t know ocean conditions in advance

  13. Survival Comparison of Short- and No-Term Reconditioned Kelts to ‘natural’ Iteroparity Bonneville Adult Ladder Tag Detections

  14. What happens to long-term kelts after release? 2001-2005 radio telemetry studies found 70% of recaptured tags at mouths of Satus and Toppenish Creeks

  15. Reproductive Success • Knowns: • Grow substantially and remature their gonads • Produce viable gametes • Find mates • Locate appropriate spawning habitat • Construct and guard redds • Recaptures show evidence of spawning • Successful reproduction has been recorded in Omak Creek

  16. Questions??

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