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Comparative Survival Study Project #199602000

Comparative Survival Study Project #199602000. Delayed Mortality Workshop Feb 10, 2004 Bonneville Hot Springs Resort, WA FPC , IDFG,ODFW, CRITFC, WDFW, and USFWS. Background. Study initiated in 1996 by states, tribes ,& FWS to estimate survival rates at various life stages

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Comparative Survival Study Project #199602000

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  1. Comparative Survival StudyProject #199602000 Delayed Mortality Workshop Feb 10, 2004 Bonneville Hot Springs Resort, WA FPC, IDFG,ODFW, CRITFC, WDFW, and USFWS

  2. Background • Study initiated in 1996 by states, tribes ,& FWS to estimate survival rates at various life stages • Compare survival rates for chinook from 3 areas • Develop a more representative control for transport evaluations • CSS information derived from PIT tags

  3. The CSS is a joint project of the state, tribal fishery managers and the US Fish and Wildlife Service

  4. Snake LGR-LGR SAR in-river group T/I= ÷ LGR-LGR SAR transported group BON-LGR SAR in-river group D = ÷ BON-LGR SAR transported group Lower Granite Little Goose C o l u m b i a Lower Monumental Ice Harbor McNary In-river survival Transport survival John Day The Dalles Bonneville Estuary Ocean

  5. rel_date river_km rel_site tag_id 5/11/94 17:10 522.226 SNAKER 7F7D41315C 6/1/94 15:49 522.226 SNAKER 1F56355105 PITtag detectionhistory 6/1/94 15:49 522.226 SNAKER 1F57530334 6/1/94 15:49 522.226 SNAKER 1F57716732 Summarize into Burnham tabulature 100000 356 110000 221 … calculate survivals and detection prob In - river survivals and detection prob. Use detection history and detection prob. to estimate total arrival at LGR dam LGR arrival number Tally number first detected at each project and divide by survival to each project Number of fish detected in LGR equivalents LGR arrival minus sum of all first detects in LGR equiv. Number uncollected Total number of adults arriving at BON from total number of smolt for most representative of in - river and transport detections in LGR equiv. LGR - BON SAR for in - river and transport groups Divide LGR - BON transport SAR by BON - BON in - river SAR Estimate of T/C Mulitply T/C by ratio of LGR - BON in - river survival to LGR - BON transport survival Estimate of D Bootstrapped Survival Estimates - Create a new sample drawing at random with replacement from original data Repeat 1000x to create confidence intervals

  6. What does CSS project provide? • Long term consistent indices: • Travel Times • In-river Survival Rates • In-river SARs by route of passage • Transport SARs • Comparisons of SARs • Transport to In-River • By geographic location • By hatchery group • Hatchery to Wild • Chinook to Steelhead

  7. Future Tasks • Steelhead Marking • Increased Wild marking for Snake and Lower Columbia chinook • Marking subyearling chinook in Snake and Mid-Columbia • Upper Columbia chinook and steelhead marking

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