Spatial distribution In 2007 IDFG adopted a rotating panel probabilistic No data on adult spawner Develop alternative methods to • • • GRTS design for assessing juvenile abundance. distribution. estimate spatial distribution (e.g., fry Crooked River done in 2008 and will be repeated. Inference of spawner distribution surveys, radio and acoustic tagging). • NPT estimating juvenile density and distribution from parr is uncertain. • using GRTS design in all tributaries up to Butcher Creek (BPA 200723300). Single year estimates. Species diversity There appear to be sufficient samples being Representativeness of index Genetic baseline to be maintained Implement a 5-year rotating panel • • • • collected to provide good baseline for future ESA streams to entire population. at regular intervals. to collect baseline genetic status review of genetic diversity. Since 2000, Idaho Develop habitat and life history samples. • Steelhead Monitoring and Evaluation Studies has model(s) to synthesize available data to collected tissue samples from populations across all extrapolate from index samples to an the various populations in the Clearwater and Salmon appropriate population scale. basins. In 2007, 678 genetics samples across Idaho were • analyzed. Crooked River adult steelhead genetics collected • and processed at IDFG Eagle Lab (2007-2008). Juvenile and adult life history characteristics • estimated at weirs and screw traps (i.e., scales, lengths, PIT tags, gender). Lolo Creek Population Adult abundance Hatchery fish released for supplementation. Genetic samples not included in Collect genetic samples. NPT proposes constructing • • • • No adult steelhead weirs. (Seasonal weir used only baseline. This is a gap in the Investigate Genetic Parentage Analysis steelhead/Chinook weir in • • during Chinook migration.) overall GSI baseline database. Techniques to Estimate Spawner conjunction with increased B-run Natural-origin Snake River Steelhead MPG and Supplementation with Dworshak Abundance in ESA-listed Steelhead steelhead supplementation • • population abundance via GSI at LGR began in 2008. origin hatchery smolts will increase Populations. effectiveness research in Lolo Natural and hatchery adults monitored at ISEMP PIT to 200K per year in 2010 and may Creek. • tag arrays (NPT/IDFG) confound methods to estimate natural spawners.
Spatial distribution • In 2007 IDFG adopted a rotating panel probabilistic GRTS design for assessing juvenile abundance. Crooked River done in 2008 and will be repeated. • NPT estimating juvenile density and distribution using GRTS design in all tributaries up to Butcher Creek (BPA 200723300). Single year estimates. • 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, radio and acoustic tagging). Species diversity • There appear to be sufficient samples being collected to provide good baseline for future ESA status review of genetic diversity. Since 2000, Idaho Steelhead Monitoring and Evaluation Studies has collected tissue samples from populations across all the various populations in the Clearwater and Salmon basins. • In 2007, 678 genetics samples across Idaho were analyzed. • Crooked River adult steelhead genetics collected and processed at IDFG Eagle Lab (2007-2008). • Juvenile and adult life history characteristics estimated at weirs and screw traps (i.e., scales, lengths, PIT tags, gender). • Representativeness of index streams to entire population. • Genetic baseline to be maintained at regular intervals. • Develop habitat and life history model(s) 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. Lolo Creek Population Adult abundance • Hatchery fish released for supplementation. • No adult steelhead weirs. (Seasonal weir used only during Chinook migration.) • Natural-origin Snake River Steelhead MPG and population abundance via GSI at LGR began in 2008. • Natural and hatchery adults monitored at ISEMP PIT tag arrays (NPT/IDFG) • Genetic samples not included in baseline. This is a gap in the overall GSI baseline database. • Supplementation with Dworshak origin hatchery smolts will increase to 200K per year in 2010 and may confound methods to estimate natural spawners. • Collect genetic samples. • Investigate Genetic Parentage Analysis Techniques to Estimate Spawner Abundance in ESA-listed Steelhead Populations. • NPT proposes constructing steelhead/Chinook weir in conjunction with increased B-run steelhead supplementation effectiveness research in Lolo Creek.
chapters_7-9_idaho_mu_plan_november_2015.docx