Smolt Migration 2006 (preliminary results)

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Presentation transcript:

Smolt Migration 2006 (preliminary results) Fish Passage Center

Review of 2006 Smolt Migration Run Size Timing Spread-the-risk delayed transport Subyearling survival & summer spill

Yearling Chinook Population Index at Lower Granite and Hatchery Releases

Combined H&W Steelhead Population at Lower Granite and Hatchery Releases

Timing of Spring Migrants at Lower Granite

Wild PIT-tagged Yearling Chinook Timing at LGR and wild run at large

Wild PIT-tag Steelhead Timing at Lower Granite and Combined run at large

Run at Large ST & CH 10Yr Avg Timing at LGR

Estimated Collection Efficiency Summary of 2006 Transport Species Proportion Passing During Transport Estimated Collection Efficiency of Pop transport P(T) LGR LGS LMN MCN Wild Steelhead 0.87a 0.37 0.66 0.61 na 0.79 Hatchery Steelhead 0.35 0.62 0.53 0.76 Wild Sp/Su Chinook 0.68 0.32 0.58 0.5 Hatch Sp/Su Chinook 0.86 0.24 0.42 Wild fall Chinook (subs) ~1 0.16 0.3 0.12 0.21 0.48 Hatch fall Chinook (subs) 1 0.18 0.17 P(T) = [CElgr + CElgs*(1-CElgr) + CElmn*(1-CElgs)(1-CElgr)]*Prop(Pop)

Other ways to measure transport proportion Species Prop Pop Passing During Transport Prop(Pop) Overall Prob of transport P(T) Prob of transpt (Destin-ed) P(t) Prob of passing uncollected P(Unc) In-River Prop Below LMN P(InRiv) In-Trans Prop Below LMN P(Tran) InRiver Prop Bypassed P(Byp) (pct of InRiv) Wild Steelhead 0.87a 0.79 0.92 0.08 0.17 0.77 0.12(69%) Hatchery Steelhead 0.76 0.88 0.12 0.20 0.74 0.11(58%) Wild Sp/Su Chinook 0.68 0.58 0.86 0.14 0.36 0.55 0.27(77%) Hatch Sp/Su Chinook 0.61 0.71 0.29 0.28 0.51 0.10(36%) Wild fall Chinook (s) NA(1) 0.48 0.52 0.33 0.41 Hatch fall Chinook (s) 1 0.53 0.47 0.35 0.46 P(T) = P(t)* Prop(Pop) P(t) = CElgr + CElgs*(1-CElgr) + CElmn*(1-CElgs)(1-CElgr) P(Unc) = (1-CElgr)(1-CElgs)(1-CElmn) P(InRiv) = Prop(Pop)*[P(Unc)*Slgs*Slmn] + (1-Prop(pop))*Slgs*Slmn P(Tran) = Prop(Pop)*[CElgr + CElgs*(1-CElgr)* Slgs + CElmn*(1-CElgs)(1-CElgr)*Slgs*Slmn] P(Byp) = CElgr + CElgs*(1-CElgr) + CElmn*(1-CElgs)(1-CElgr) (*1- Prop(Pop))

Hatchery/Supplementation Releases of Subyearling Chinook above LGR

Subyearling Chinook Timing at LGR

Survival for Production Subyearling Chinook LGR to McN 1998 to 2006 with 95% CI’s

Weighted Regression example

AH Subyearling Chinook Survival vs Avg Spill Pct LGS, LMN, IHR, McN

AH Subyearling Chinook Survival vs sum WTT LGS, LMN, IHR, McN

AH Subyearling Chinook Survival vs Avg Temp LGS, LMN, IHR, McN