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? One screw trap operated by IDFG on lower Big Short time frame for screw trap Modify PIT antenna array in lower Big Explore feasibility of sampling • • • • Creek. data (starting 2007) CV not known Creek for year-round dependability. smolts at LGR using GSI and (with Juvenile abundance estimated at trap using or not calculated? Increased PIT tagging or roll up SARs age analysis) for productivity and • • mark recapture (ISMES). PIT antenna in Big Creek to larger scale. SAR. • Survival of juveniles to LGR estimated using PIT operated entire (attempted Explore alternative methods of SBT proposes screw trap for • –year • • tags (ISMES). Dispersed PIT tagging 2000-06. estimating SARs. Chinook and steelhead in Camas • Age structure estimated from scale analysis Representativeness of Big Creek and Loon Creeks. • • Juvenile (ISMES). to entire population? productivity PIT antenna array at Taylor Ranch Imprecision of SARs at • • population level. 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? INPMEP (BPA 199107300) No data on adult spawner Develop alternative methods to • • • distribution. estimate spatial distribution (e.g., fry Spatial distribution Inference of spawner distribution surveys, radio and acoustic tagging). • from parr is uncertain. Juvenile life history characteristics estimated at Limited adult life history data Collect adult life history data. Implement a 5-year rotating panel • • • • Species diversity screw trap (i.e., scales, lengths, PIT tags, gender). collected in lower MFSR in early Genetic baseline to be maintained to collect baseline genetic • 1990s (scales, lengths, gender). at regular intervals. samples.
• 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? Juvenile productivity • One screw trap operated by IDFG on lower Big Creek. • Juvenile abundance estimated at trap using mark recapture (ISMES). • Survival of juveniles to LGR estimated using PIT tags (ISMES). • Age structure estimated from scale analysis (ISMES). • PIT antenna array at Taylor Ranch • Short time frame for screw trap data (starting 2007) CV not known or not calculated? • PIT antenna in Big Creek operated entire –year (attempted • Dispersed PIT tagging 2000-06. • Representativeness of Big Creek to entire population? • Imprecision of SARs at population level. • 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? • Modify PIT antenna array in lower Big Creek for year-round dependability. • Increased PIT tagging or roll up SARs to larger scale. • Explore alternative methods of estimating SARs. • Explore feasibility of sampling smolts at LGR using GSI and (with age analysis) for productivity and SAR. • SBT proposes screw trap for Chinook and steelhead in Camas and Loon Creeks. Spatial distribution • INPMEP (BPA 199107300) • 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). • Limited adult life history data collected in lower MFSR in early 1990s (scales, lengths, gender). • Collect adult life history data. • Genetic baseline 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