2006 Coho Juvenile Migration and Radio Tracking Distribution
Presented By:
Todd Newsome
Fisheries Biologist for the Yakama Nation
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Background
Phase I Conclusions
- Successful Reestablishment of a Natural Coho Population using donor stocks
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- Successful Monitoring and Evaluation to assess:
- Impacts to other species
- Survival of smolts and returning adults
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- Spawning distribution
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- Identified appropriate out of basin founding stocks
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Upriver Coho SAR Indices
Interim Work
Phase II Set Up Work
- Brood Stock Development
- Continued Evaluation of In basin vs. out of basin Coho stocks
- Over winter Survival Assessment
- Base Line Monitoring for Naches Tributaries
- On going interactions monitoring
- Continued Monitoring and Assessment of Adult Coho Escapement and Redd Distribution
Local In Basin Brood Development
- 270 Females Spawned 50% Wild
- 130 Males 100% Wild
- Estimated egg take of ~800,000
- Estimated 450,000 In Basin Coho for 2008 release.
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50% Passage, Natural vs. Hatchery
2nd Step in Isolating and reducing possible mortality (Timing)
Over-winter Survival Studies
- Released as 65-80mm late summer Parr; 3 year evaluation.
- Is it cost effective? Saves hatchery money and space.
- Is there an element of wildness introduced into the surviving spring migrants? Example: will the over-winter parr exhibit SAR rates similar to our NOR coho or our HOR coho??
- Which ponds/side channels offer the highest survival?
- Results of this may ultimately lead to some over-winter acclimation.
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Final Over-winter Results, Year 3
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Adult Returns
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Habitat Work
Coho Highlights
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Phase II (2007-2011)
- Objectives
- Identify Key Tributaries offering the highest potential for Coho Reestablishment
- Evaluate interactions with resident and anadromous fish already residing in tributaries
- Increase the resiliency, and robustness of the Coho population in the Yakima Basin
- ACTION
- Monitor Tributary Parr Releases
- Monitor Tributary Adults Releases
- Continue In Basin Brood Stock Development
- New Smolt Acclimation Areas (spread out the risk and increase survival)
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Baseline Data Monitoring
and Evaluation For Phase II
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Adult Out Planting
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Development of a Final
Coho Master Plan
- Using the results of Phase I and II, the final plan will guide future reintroduction efforts.
- The Coho Master Plan will identify key infrastructures (e.g. broodstock collection facility, hatchery and acclimation sites).
- The Coho Master Plan will outline monitoring and evaluation objectives.
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The End