SBT collects information on life history at Yankee • Fork trap. SBT have been collecting tissue samples from • Yankee Fork 2006. Secesh River Population No Will be improving due to Need adult abundance information. • • • No hatchery fish released. implementation of ISMEP. • Natural-origin Snake River Steelhead MPG and Expected genetics resolution is • • population abundance via Genetic Stock Identification for Fork Salmon and Secesh at LGR began in 2008. Age and length composition as a unit. and sex ratios also determined. CV not known or not calculated? • Adult abundance NPT and IDFG watershed beginning in 2009. • Adults estimated with PIT tag array installed in Secesh River. IDFG increased B Run monitoring in Clearwater and • Salmon river drainages (Columbia Basin Fish Accords). IDFG Columbia Fish Accord provides Need better estimates of natural Develop surveys of hatchery spawner • • • $150,000/yr to do GSI assessments (combined with cohort age and sex structure. fraction in index streams below weir. age and sex comp.) in Clearwater and Salmon River. Estimates of natural population Reevaluate juvenile sampling design • • Annual parr density monitoring (surrogate for adults) incidental mortality from sport and verify age structure assumptions • conducted by IDFG within population. fisheries are imprecise. needed for productivity estimates. productivity INPMEP (BPA 199107300) $785K/yr. Estimating adult steelhead Develop habitat and life cycle model(s) • • • No sport fishing for adult steelhead permitted within abundance cannot be done to synthesize available data to • population boundaries. accurately using traditional extrapolate from index samples to an methods in high and turbid flows, appropriate population scale. juvenile estimates are important as a proxy for adult productivity.
• SBT collects information on life history at Yankee Fork trap. • SBT have been collecting tissue samples from Yankee Fork 2006. Secesh River Population Adult abundance • No • No hatchery fish released. • 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. • NPT and IDFG watershed beginning in 2009. Adults estimated with PIT tag array installed in Secesh River. • IDFG increased B Run monitoring in Clearwater and Salmon river drainages (Columbia Basin Fish Accords). • Will be improving due to implementation of ISMEP. • Expected genetics resolution is for Fork Salmon and Secesh as a unit. • CV not known or not calculated? • Need adult abundance information. productivity • IDFG Columbia Fish Accord provides $150,000/yr to do GSI assessments (combined with age and sex comp.) in Clearwater and Salmon River. • Annual parr density monitoring (surrogate for adults) conducted by IDFG within population. • INPMEP (BPA 199107300) $785K/yr. • No sport fishing for adult steelhead permitted within population boundaries. • 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. • Develop surveys of hatchery spawner fraction in index 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.
chapters_7-9_idaho_mu_plan_november_2015.docx