No adult life history data except from limited Representativeness of Big Creek Develop habitat and life history • • • sampling in Big Creek. to entire population. model(s) to synthesize available data to 2000 ISMES has collected and processed DNA extrapolate from index samples to an • samples throughout the Clearwater and Salmon appropriate population scale. basins. In 2007 678 DNA samples were analyzed. Upper Middle Fork Salmon River Population Adult abundance No weirs. Accuracy of GSI to identify • • No hatchery fish released. from lower MF Salmon population • Natural-origin Snake River Steelhead MPG and not yet determined. • population abundance via Genetic Stock Identification CV not known or not calculated? • at LGR began in 2008. Age and length composition and sex ratios also determined. 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 • • (BPA 199005500 ) $784K/yr. incidental mortality from sport and verify age structure assumptions • No sport fishing for adult steelhead permitted within fisheries are imprecise. needed for productivity estimates. • the boundaries of this population. Estimating adult steelhead Develop habitat and life cycle model(s) • • Annual parr density monitoring (surrogate for adults) abundance cannot be done to synthesize available data to • conducted by IDFG within population. accurately using traditional extrapolate from index samples to an INPMEP (BPA 199107300) $785K/yr. methods in high and turbid flows, appropriate population scale. • 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 IDFG at Marsh Creek. Dispersed PIT tagging Increased PIT tagging or roll up SARs Explore feasibility of sampling • • • • productivity Slated to end after 2014. (ISS 198909800) to larger scale. smolts at LGR using GSI and (with
• No adult life history data except from limited sampling in Big Creek. • 2000 ISMES has collected and processed DNA samples throughout the Clearwater and Salmon basins. In 2007 678 DNA samples were analyzed. • Representativeness of Big Creek to entire population. • Develop habitat and life history model(s) to synthesize available data to extrapolate from index samples to an appropriate population scale. Upper Middle Fork Salmon River Population Adult abundance • No weirs. • 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. • Accuracy of GSI to identify from lower MF Salmon population not yet determined. • CV not known or not calculated? 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. • (BPA 199005500 ) $784K/yr. • No sport 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. • 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. Juvenile productivity • One trap operated by IDFG at Marsh Creek. Slated to end after 2014. (ISS 198909800) • Dispersed PIT tagging • 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