Hatchery fish released for harvest augmentation (at operated during high flow (usually program. Current capital design does satellite facility on Yankee Fork to • Sawtooth Hatchery and in Salmon River) and mid-May to late-June). not allow. trap, hold, and spawn adults. supplementation (Yankee Fork, Slate and Valley Squaw Creek weir inefficient. Need supplementation effectiveness • • Creeks). Kelts are not collected to M&E for SBT program. • Natural-origin Snake River Steelhead MPG and estimate weir efficiency. • population abundance via Genetic Stock Identification Accuracy of GSI to identify this • at LGR began in 2008. Age and length composition population not yet determined. and sex ratios also determined. SBT also release supplementation eggs in Yankee • Fork and collect juvenile abundance information. Age structure information, sex ratios, hatchery Estimates of natural population Develop surveys of hatchery spawner • • • percentage estimated at both weirs. incidental mortality from fraction in streams below weir. PIT-tags scanned at Sawtooth Hatchery weir. fisheries are imprecise. Reevaluate juvenile sampling design • • IDFG Columbia Basin Fish Accord provides Tribal harvest estimate is limited and verify age structure assumptions • • $150,000/yr to do GSI assessments (combined with by funding. needed for productivity estimates. age and sex comp.) in Clearwater and Salmon River. Estimating adult steelhead Develop habitat and life cycle model(s) • • SBT monitor tribal harvest in the Salmon and abundance cannot be done to synthesize available data to • tributaries. accurately using traditional extrapolate from index samples to an Adult productivity ISMES methods in high and turbid flows, appropriate population scale. • IDFG phone survey estimates sport harvest in juvenile estimates are important as • recreational fisheries. a proxy for adult productivity. Sport fishing for adult steelhead within population Population heavily influenced by • • boundaries is permitted only in the mainstem Salmon hatchery steelhead; hatchery River. fraction data are lacking. Annual parr density monitoring (surrogate for adults) • conducted by IDFG within population. INPMEP •
• Hatchery fish released for harvest augmentation (at Sawtooth Hatchery and in Salmon River) and supplementation (Yankee Fork, Slate and Valley Creeks). • Natural-origin Snake River Steelhead MPG and population abundance via Genetic Stock Identification at LGR began in 2008. Age and length composition and sex ratios also determined. • SBT also release supplementation eggs in Yankee Fork and collect juvenile abundance information. operated during high flow (usually mid-May to late-June). • Squaw Creek weir inefficient. • Kelts are not collected to estimate weir efficiency. • Accuracy of GSI to identify this population not yet determined. program. Current capital design does not allow. • Need supplementation effectiveness M&E for SBT program. satellite facility on Yankee Fork to trap, hold, and spawn adults. Adult productivity • Age structure information, sex ratios, hatchery percentage estimated at both weirs. • PIT-tags scanned at Sawtooth Hatchery weir. • IDFG Columbia Basin Fish Accord provides $150,000/yr to do GSI assessments (combined with age and sex comp.) in Clearwater and Salmon River. • SBT monitor tribal harvest in the Salmon and tributaries. • ISMES • IDFG phone survey estimates sport harvest in recreational fisheries. • Sport fishing for adult steelhead within population boundaries is permitted only in the mainstem Salmon River. • Annual parr density monitoring (surrogate for adults) conducted by IDFG within population. • INPMEP • Estimates of natural population incidental mortality from fisheries are imprecise. • Tribal harvest estimate is limited by funding. • Estimating adult steelhead abundance cannot be done accurately using traditional methods in high and turbid flows, juvenile estimates are important as a proxy for adult productivity. • Population heavily influenced by hatchery steelhead; hatchery fraction data are lacking. • Develop surveys of hatchery spawner fraction in streams below weir. • Reevaluate juvenile sampling design and verify age structure assumptions needed for productivity estimates. • Develop habitat and life cycle model(s) to synthesize available data to extrapolate from index samples to an appropriate population scale.