Population may be influenced by • hatchery steelhead; hatchery fraction data are lacking. Two screw traps operated by NPT for ISS (upper Dispersed PIT tagging ISEMP is increasing PIT tagging and/or Explore feasibility of using GSI • • • • Secesh & Lake Creek, both planned to cease roll up SARs to larger scale. and age comp. for smolts at LGR. operating in 2014). Representativeness of sampled Explore alternative method of • • One IDFG trap in lower Secesh run by IDFG for streams to entire population estimating SARs with precision. • ISEMP. Imprecision of SARs at • Juvenile abundance estimated at traps using population • mark recapture (ISMES/ ISEMP). Determining is a smolt” is • “what Juvenile Juvenile survival to LGR estimated using PIT tags. very important. What are the rates • productivity Age structure estimated from scale analysis. of residency? What proportion of • IDFG increased B Run monitoring in Clearwater and the fish captured and tagged at • Salmon drainages (Columbia Basin Fish screw traps are smolts and/or Accords). actively migrating? Ave. CV = 20.9 with a range of • 6.9 to 32.3. Traps not operated in winter and represent a minimal estimate. 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). Secesh done in 2008; one time Inference of spawner distribution surveys, and acoustic tagging). • survey. from parr evaluation sites is uncertain. Juvenile and life history characteristics Representativeness of Collect adult life history data, or use Implement a 5-year rotating panel • • • • estimated at screw traps (i.e., scales, lengths, PIT streams to entire population. other populations. to collect baseline genetic Species diversity tags, gender). Genetic baseline needs to be samples. • No adult life history data. maintained at regular intervals. •
• Population may be influenced by hatchery steelhead; hatchery fraction data are lacking. Juvenile productivity • Two screw traps operated by NPT for ISS (upper Secesh & Lake Creek, both planned to cease operating in 2014). • One IDFG trap in lower Secesh run by IDFG for ISEMP. • Juvenile abundance estimated at traps using mark recapture (ISMES/ ISEMP). • Juvenile survival to LGR estimated using PIT tags. • Age structure estimated from scale analysis. • IDFG increased B Run monitoring in Clearwater and Salmon drainages (Columbia Basin Fish Accords). • Dispersed PIT tagging • Representativeness of sampled streams to entire population • Imprecision of SARs at population • 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? • Ave. CV = 20.9 with a range of 6.9 to 32.3. Traps not operated in winter and represent a minimal estimate. • ISEMP is increasing PIT tagging and/or roll up SARs to larger scale. • Explore alternative method of estimating SARs with precision. • 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). Secesh done in 2008; one time survey. • No data on adult spawner distribution. • Inference of spawner distribution from parr evaluation sites is uncertain. • Develop alternative methods to estimate spatial distribution (e.g., fry surveys, and acoustic tagging). Species diversity • Juvenile and life history characteristics estimated at screw traps (i.e., scales, lengths, PIT tags, gender). • No adult life history data. • Representativeness of streams to entire population. • Collect adult life history data, or use other populations. • Genetic baseline needs to be maintained at regular intervals. • Implement a 5-year rotating panel to collect baseline genetic samples.
chapters_7-9_idaho_mu_plan_november_2015.docx