One trap operated by SBT on lower EF Salmon Currently no estimates of juvenile Collect steelhead data at EFSR screw Explore feasibility of using GSI • • • • River targeting Chinook. No steelhead are PIT-tagged. abundance made due to the low trap. Relocate trap further downstream and age comp. for smolts at LGR. Plan to cease operation in 2014. number of juveniles trapped. from its present location. Snorkel data since 1982 in upper EF and Herd Imprecision of SARs at Increase PIT tagging or roll up SARs to • • • Juvenile Creek. population level. larger scale. productivity CV not known or not calculated? Explore alternative method of • • estimating SARs with precision. Address hatchery steelhead releases • relative to monitoring natural steelhead. In 2007 IDFG adopted a rotating panel probabilistic No data on adult spawner Develop alternative methods to • • • GRTS design for assessing the abundance of juvenile distribution. estimate spatial distribution (e.g., fry Spatial distribution salmonids (INPMEP). Inference of spawner distribution surveys, and acoustic tagging). • Some juvenile distribution data available from SBT from parr is uncertain. • snorkel surveys. Adult life history characteristics collected at the weir Representativeness of data from Collect juvenile life history data at SBT Implement a 5-year rotating panel • • • • (i.e., scales, lengths, PIT tags, gender). populations to this population. screw trap, or use other populations. to collect baseline genetic No juvenile life history data collected at trap. Additional samples need to be collected samples. • • from juveniles and adults to include in genetic baseline database. Species diversity Genetic baseline needs to be • maintained at regular intervals. Develop habitat and life history • to synthesize available data to extrapolate from index samples to an appropriate population scale. Upper Mainstem Salmon River Population One weir in Salmon River at IDFG Sawtooth Sawtooth Hatchery weir Integrate wild steelhead monitoring at SBT plan to build a steelhead • • • • Adult abundance Hatchery and one in Squaw Creek. designed for Chinook and is not Sawtooth Hatchery weir more and Chinook salmon hatchery thoroughly with state-wide monitoring
Juvenile productivity • One trap operated by SBT on lower EF Salmon River targeting Chinook. No steelhead are PIT-tagged. Plan to cease operation in 2014. • Snorkel data since 1982 in upper EF and Herd Creek. • Currently no estimates of juvenile abundance made due to the low number of juveniles trapped. • Imprecision of SARs at population level. • CV not known or not calculated? • Collect steelhead data at EFSR screw trap. Relocate trap further downstream from its present location. • Increase PIT tagging or roll up SARs to larger scale. • Explore alternative method of estimating SARs with precision. • Address hatchery steelhead releases relative to monitoring natural steelhead. • Explore feasibility of using GSI and age comp. for smolts at LGR. Spatial distribution • In 2007 IDFG adopted a rotating panel probabilistic GRTS design for assessing the abundance of juvenile salmonids (INPMEP). • Some juvenile distribution data available from SBT snorkel surveys. • No data on adult spawner distribution. • Inference of spawner distribution from parr is uncertain. • Develop alternative methods to estimate spatial distribution (e.g., fry surveys, and acoustic tagging). Species diversity • Adult life history characteristics collected at the weir (i.e., scales, lengths, PIT tags, gender). • No juvenile life history data collected at trap. • Representativeness of data from populations to this population. • Collect juvenile life history data at SBT screw trap, or use other populations. • Additional samples need to be collected from juveniles and adults to include in genetic baseline database. • Genetic baseline needs to be maintained at regular intervals. • Develop habitat and life history to synthesize available data to extrapolate from index samples to an appropriate population scale. • Implement a 5-year rotating panel to collect baseline genetic samples. Upper Mainstem Salmon River Population Adult abundance • One weir in Salmon River at IDFG Sawtooth Hatchery and one in Squaw Creek. • Sawtooth Hatchery weir designed for Chinook and is not • Integrate wild steelhead monitoring at Sawtooth Hatchery weir more thoroughly with state-wide monitoring • SBT plan to build a steelhead and Chinook salmon hatchery
chapters_7-9_idaho_mu_plan_november_2015.docx