Juvenile abundance estimated at screw trap using Representativeness of Marsh Explore alternative method of age analysis) for productivity and • • • mark recapture. Creek to entire population. estimating SARs with precision. SAR. Survival of juveniles to LGR estimated using PIT Imprecision of SARs at SBT propose screw trap for • • • tags. population level CV not known or Chinook and steelhead in Bear Age structure estimated from scale analysis. not calculated? Valley Creek. • Determining is a smolt” is • “what very important. What are the rates of residency? What proportion of the fish captured and tagged at screw traps are smolts and/or actively migrating? Spatial distribution 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 salmonids. Marsh Creek & Rapid River (MFSR trib) Inference of spawner distribution surveys, radio and acoustic tagging). • done in 2007 & 2008. Ended in 2008 from parr is uncertain. Species diversity Juvenile life history characteristics estimated at Representativeness of Marsh Collect adult life history data. Implement a 5-year rotating • • • • screw trap (i.e., scales, lengths, PIT tags, gender). Creek to entire population. Genetic baseline needs to be to collect baseline genetic • No adult life history data. maintained at regular intervals. samples. • Since 2000 ISMES has collected and processed Develop habitat and life history • • DNA samples throughout the Clearwater and Salmon model(s) to synthesize available data to basins. In 2007, 678 DNA samples were analyzed. extrapolate from index samples to an appropriate population scale. South Fork Salmon River Population Adult abundance No weirs operated for steelhead; IDFG McCall CV not known or not calculated? Upgrade SFSR hatchery weir to enable • • • hatchery operates weir for summer Chinook (not trapping during steelhead spawning; designed or planned to trap steelhead). collect age structure information, sex No hatchery fish released. ratios, and hatchery percentage? • Natural-origin Snake River Steelhead MPG and However, the weir is located in • population abundance via Genetic Stock Identification headwaters; most spawning is
• Juvenile abundance estimated at screw trap using mark recapture. • Survival of juveniles to LGR estimated using PIT tags. • Age structure estimated from scale analysis. • Representativeness of Marsh Creek to entire population. • Imprecision of SARs at population level CV not known or not calculated? • Determining “what is a smolt” is very important. What are the rates of residency? What proportion of the fish captured and tagged at screw traps are smolts and/or actively migrating? • Explore alternative method of estimating SARs with precision. age analysis) for productivity and SAR. • SBT propose screw trap for Chinook and steelhead in Bear Valley Creek. Spatial distribution • In 2007 IDFG adopted a rotating panel probabilistic GRTS design for assessing the abundance of juvenile salmonids. Marsh Creek & Rapid River (MFSR trib) done in 2007 & 2008. Ended in 2008 • 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 • Juvenile life history characteristics estimated at screw trap (i.e., scales, lengths, PIT tags, gender). • No adult life history data. • Since 2000 ISMES has collected and processed DNA samples throughout the Clearwater and Salmon basins. In 2007, 678 DNA samples were analyzed. • Representativeness of Marsh Creek to entire population. • Collect adult life history data. • Genetic baseline needs 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 to collect baseline genetic samples. South Fork Salmon River Population Adult abundance • No weirs operated for steelhead; IDFG McCall hatchery operates weir for summer Chinook (not designed or planned to trap steelhead). • No hatchery fish released. • Natural-origin Snake River Steelhead MPG and population abundance via Genetic Stock Identification • CV not known or not calculated? • Upgrade SFSR hatchery weir to enable trapping during steelhead spawning; collect age structure information, sex ratios, and hatchery percentage? However, the weir is located in headwaters; most spawning is
chapters_7-9_idaho_mu_plan_november_2015.docx