at LGR began in 2008. Age and length composition downstream. Weir would intercept only a and sex ratios also determined. small portion of this population. May not Expected genetics resolution is for South Fork and be feasible to upgrade this weir to • Secesh as a unit. operate during steelhead spawning. NPT and IDFG watershed. South Fork is an • intensively managed watershed. Adults estimated using PIT tag array. Habitat monitored under CHaMP. IDFG increasing B Run monitoring in Clearwater and • Salmon river drainages. Adult productivity IDFG Columbia Basin 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. age and sex comp.) in Clearwater and Salmon Rivers. Estimates of natural population Reevaluate juvenile sampling design • • No fishing for adult steelhead permitted within incidental mortality from and verify age structure assumptions • the boundaries of this population. fisheries are imprecise. needed for productivity estimates. Annual parr density monitoring (surrogate for adults) Estimating adult steelhead Develop habitat and life cycle model(s) • • • conducted by IDFG within population. abundance cannot be done to synthesize available data to INPMEP (BPA 199107300) $785K/yr. accurately using traditional extrapolate from index samples to an • IDFG increasing B Run monitoring in Clearwater and methods in high and turbid flows; appropriate population scale. • Salmon river drainages. juvenile estimates are important as a proxy for adult productivity. Population may be influenced by • hatchery steelhead; hatchery fraction data are lacking. Juvenile One trap operated by NPT on Johnson Creek. Representativeness of sampled Increased PIT tagging or roll up SARs Explore feasibility of sampling • • • • productivity One screw trap operated by IDFG on upper SF streams to entire population. to larger scale. smolts at LGR GSI and (with • Salmon. Plan to end trapping in 2014. Imprecision of SARs at Explore alternative method of age analysis) for productivity and • • Juvenile abundance estimated at screw trap using population level CV not known or estimating SARs with precision. SAR. • mark recapture. not calculated? Johnson Creek ave. CV is not known. •
at LGR began in 2008. Age and length composition and sex ratios also determined. • Expected genetics resolution is for South Fork and Secesh as a unit. • NPT and IDFG watershed. South Fork is an intensively managed watershed. Adults estimated using PIT tag array. Habitat monitored under CHaMP. • IDFG increasing B Run monitoring in Clearwater and Salmon river drainages. downstream. Weir would intercept only a small portion of this population. May not be feasible to upgrade this weir to operate during steelhead spawning. 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 Rivers. • No fishing for adult steelhead permitted within the boundaries of this population. • Annual parr density monitoring (surrogate for adults) conducted by IDFG within population. • INPMEP (BPA 199107300) $785K/yr. • IDFG increasing B Run monitoring in Clearwater and Salmon river drainages. • Need better estimates of natural cohort age and sex structure. • Estimates of natural population incidental mortality from 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. Juvenile productivity • One trap operated by NPT on Johnson Creek. • One screw trap operated by IDFG on upper SF Salmon. Plan to end trapping in 2014. • Juvenile abundance estimated at screw trap using mark recapture. • Representativeness of sampled streams to entire population. • Imprecision of SARs at population level CV not known or not calculated? • Increased PIT tagging or roll up SARs to larger scale. • Explore alternative method of estimating SARs with precision. • Johnson Creek ave. CV is not known. • Explore feasibility of sampling smolts at LGR GSI and (with age analysis) for productivity and SAR.
chapters_7-9_idaho_mu_plan_november_2015.docx