Panther Creek Population No weirs. Accuracy of GSI to identify this SBT proposing to install adult • • • No hatchery fish released but hatchery smolts and population not yet determined. trap in Panther Creek for Chinook • adults use mainstem Salmon as migration CV not known or not calculated? salmon. Trap may be used to • corridor. capture adult steelhead. SBT operate a steelhead streamside incubator • Adult abundance project in Panther Creek. Natural-origin Snake River Steelhead MPG and • population abundance via Genetic Stock Identification (GSI) at Lower Granite Dam began in 2008 $150K/yr (ISMES). Age and length composition and sex ratios also determined. IDFG Columbia Basin Fish Accord provides Need better estimates of natural Develop surveys of hatchery spawner SBT proposing to install adult • • • • $150,000/yr to do GSI assessments (combined with cohort age and sex structure. fraction in index streams. weir and trap. age and sex comp.) in Clearwater and Salmon River. Estimates of natural population Reevaluate juvenile sampling design • • (BPA 199005500 ) $784K/yr. incidental mortality from sport and verify age structure assumptions • IDFG survey estimates sport harvest in fisheries are imprecise. needed for productivity estimates. • recreational fisheries. Estimating adult steelhead Develop habitat and life cycle model(s) • • Sport fishing for adult steelhead within population abundance cannot be done to synthesize available data to • Adult productivity boundaries is permitted only in the mainstem Salmon accurately using traditional extrapolate from index samples to an River. methods in high and turbid flows, appropriate population scale. Annual parr density site monitoring (surrogate juvenile estimates are important as • for adults) conducted by IDFG within population. a proxy for adult productivity. INPMEP Population may be influenced by • • hatchery steelhead; hatchery fraction data are lacking. No screw traps. Dispersed PIT tagging Increased PIT tagging or roll up SARs Explore feasibility of sampling • • • • Juvenile SBT operate a steelhead streamside incubator (Panther & Horse). to larger scale. smolts at LGR using GSI and (with • productivity project in Panther Creek.
Panther Creek Population Adult abundance • No weirs. • No hatchery fish released but hatchery smolts and adults use mainstem Salmon as migration corridor. • SBT operate a steelhead streamside incubator project in Panther Creek. • Natural-origin Snake River Steelhead MPG and population abundance via Genetic Stock Identification (GSI) at Lower Granite Dam began in 2008 $150K/yr (ISMES). Age and length composition and sex ratios also determined. • Accuracy of GSI to identify this population not yet determined. • CV not known or not calculated? • SBT proposing to install adult trap in Panther Creek for Chinook salmon. Trap may be used to capture adult steelhead. Adult productivity • IDFG Columbia Basin Fish Accord provides $150,000/yr to do GSI assessments (combined with age and sex comp.) in Clearwater and Salmon River. • (BPA 199005500 ) $784K/yr. • IDFG 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 site monitoring (surrogate for adults) conducted by IDFG within population. • INPMEP • Need better estimates of natural cohort age and sex structure. • Estimates of natural population incidental mortality from sport fisheries are imprecise. • 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 may be influenced by hatchery steelhead; hatchery fraction data are lacking. • Develop surveys of hatchery spawner fraction in index streams. • 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. • SBT proposing to install adult weir and trap. Juvenile productivity • No screw traps. • SBT operate a steelhead streamside incubator project in Panther Creek. • Dispersed PIT tagging (Panther & Horse). • Increased PIT tagging or roll up SARs to larger scale. • Explore feasibility of sampling smolts at LGR using GSI and (with
chapters_7-9_idaho_mu_plan_november_2015.docx