Genetics samples from and Lower Potlatch Representativeness of Genetic baseline to be maintained Implement a 5-year rotating panel • • • • River adults being analyzed annually at IDFG Eagle streams to entire population. at regular intervals. to collect baseline genetic Lab (IMW). Develop habitat and life history samples. • There appear to be sufficient samples being model(s) to synthesize available data to • collected to provide good baseline for future ESA extrapolate from index samples to an status review diversity. Since 2000, ISMES has appropriate population scale. collected tissue samples from populations across all Species diversity the various populations in the Clearwater and Salmon basins. In 2007, 678 genetics samples across Idaho were • analyzed. Juvenile and life history characteristics • estimated at weirs and screw traps (i.e., scales, lengths, PIT tags, gender). South Fork Clearwater River Population Adult abundance Hatchery fish released for supplementation and No evaluation of mark-recapture Snake River steelhead annual Snake River steelhead annual • • • • harvest augmentation. at hatchery weirs. No collection of of hatchery returns, run-reconstruction of hatchery Two hatchery weirs operated by IDFG count kelts. Weirs designed for Chinook harvest, and escapement to known and returns, harvest, and escapement • steelhead using mark recapture in Crooked and Red and not efficient at high flows. unknown population areas. to known and unknown population River. Both weirs upstream and only Integrate wild steelhead monitoring at areas. • • Natural-origin Snake River Steelhead MPG and intercept a small portion of Red and Crooked Rivers with state-wide • population abundance via GSI at Lower Granite Dam population. monitoring program. began in 2008 $150K/yr (ISMES). Accuracy of GSI to identify this • Natural and hatchery adults monitored at PIT tag population needs to be • array (NPT/IDFG) determined. No CV estimates made. • productivity Age structure information, sex ratios, hatchery Need better estimates of natural Develop surveys of hatchery spawner • • • percentage estimated at weirs. cohort age and sex structure fraction in index streams.
Species diversity • Genetics samples from and Lower Potlatch River adults being analyzed annually at IDFG Eagle Lab (IMW). • There appear to be sufficient samples being collected to provide good baseline for future ESA status review diversity. Since 2000, ISMES has collected tissue samples from populations across all the various populations in the Clearwater and Salmon basins. • In 2007, 678 genetics samples across Idaho were analyzed. • Juvenile and life history characteristics estimated at weirs and screw traps (i.e., scales, lengths, PIT tags, gender). • Representativeness of streams to entire population. • Genetic baseline to be maintained at regular intervals. • Develop habitat and life history model(s) to synthesize available data to extrapolate from index samples to an appropriate population scale. • Implement a 5-year rotating panel to collect baseline genetic samples. South Fork Clearwater River Population Adult abundance • Hatchery fish released for supplementation and harvest augmentation. • Two hatchery weirs operated by IDFG count steelhead using mark recapture in Crooked and Red River. • Natural-origin Snake River Steelhead MPG and population abundance via GSI at Lower Granite Dam began in 2008 $150K/yr (ISMES). • Natural and hatchery adults monitored at PIT tag array (NPT/IDFG) • No evaluation of mark-recapture at hatchery weirs. No collection of kelts. Weirs designed for Chinook and not efficient at high flows. • Both weirs upstream and only intercept a small portion of population. • Accuracy of GSI to identify this population needs to be determined. • No CV estimates made. • Snake River steelhead annual of hatchery returns, harvest, and escapement to known and unknown population areas. • Integrate wild steelhead monitoring at Red and Crooked Rivers with state-wide monitoring program. • Snake River steelhead annual run-reconstruction of hatchery returns, harvest, and escapement to known and unknown population areas. productivity • Age structure information, sex ratios, hatchery percentage estimated at weirs. • Need better estimates of natural cohort age and sex structure • Develop surveys of hatchery spawner fraction in index streams.
chapters_7-9_idaho_mu_plan_november_2015.docx