USFS redd surveys in the one MaSA and one of the Funding for future USFS surveys Expand redd counts to include the • • • 2 MiSAs. uncertain. Marble Creek MiSA Spatial distribution Ensure redd surveys continue should • USFS funding be reduced or eliminated. Little data available. Genetic analysis of adults and/or Implement a 5-year rotating panel • • • juveniles from this population need to be to collect baseline genetic included in baseline genetic database. samples. Species diversity Genetic baseline to be maintained • at regular intervals Adults and juvenile diversity data needs • to be obtained. Sulphur Creek Population Ground index redd surveys conducted by IDFG. Accuracy of GSI to identify this Need more accurate and precise adult • • • Data available since 1957. population needs to be determined abundance data (increased redd Adult abundance Natural-origin Snake River Chinook abundance surveys, weirs, GSI). • estimated at LGR by IDFG using GSI beginning 2008. Age composition and sex ratios also determined Sex ratio, hatchery proportion, length, percent Additional sampling of SBT Need more accurate and precise age • • • spawned, DNA, age structure are obtained from anglers to improve estimates of structure data. carcasses surveyed during IDFG ground redd count tribal harvest surveys. Adult productivity Hatchery fish are not stocked within population area. • No recreational fishing for Chinook allowed within • population boundaries. SBT conducts tribal fisheries. • Little data available. Sample size from NMFS • • Juvenile NMFS PIT-tags juvenile Chinook salmon during the tagging may be too small to obtain • productivity summer. Data used to determine run timing and accurate and precise estimates survival at LGR.
Spatial distribution • USFS redd surveys in the one MaSA and one of the 2 MiSAs. • Funding for future USFS surveys uncertain. • Expand redd counts to include the Marble Creek MiSA • Ensure redd surveys continue should USFS funding be reduced or eliminated. Species diversity • Little data available. • Genetic analysis of adults and/or juveniles from this population need to be included in baseline genetic database. • Genetic baseline to be maintained at regular intervals • Adults and juvenile diversity data needs to be obtained. • Implement a 5-year rotating panel to collect baseline genetic samples. Sulphur Creek Population Adult abundance • Ground index redd surveys conducted by IDFG. Data available since 1957. • Natural-origin Snake River Chinook abundance estimated at LGR by IDFG using GSI beginning 2008. Age composition and sex ratios also determined • Accuracy of GSI to identify this population needs to be determined • Need more accurate and precise adult abundance data (increased redd surveys, weirs, GSI). Adult productivity • Sex ratio, hatchery proportion, length, percent spawned, DNA, age structure are obtained from carcasses surveyed during IDFG ground redd count surveys. • Hatchery fish are not stocked within population area. • No recreational fishing for Chinook allowed within population boundaries. • SBT conducts tribal fisheries. • Additional sampling of SBT anglers to improve estimates of tribal harvest • Need more accurate and precise age structure data. Juvenile productivity • Little data available. • NMFS PIT-tags juvenile Chinook salmon during the summer. Data used to determine run timing and survival at LGR. • Sample size from NMFS may be too small to obtain accurate and precise estimates tagging
chapters_7-9_idaho_mu_plan_november_2015.docx