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Monitoring of Great Basin Redband Trout

Monitoring of Great Basin Redband Trout. 6 Year Pilot Study. ODFW Native Fish Investigations Project. Motives. To address data gaps outlined in the Native Fish Status Review (ODFW 2005). To provide better management for future fishing opportunities.

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Monitoring of Great Basin Redband Trout

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  1. Monitoring of Great Basin Redband Trout 6 Year Pilot Study ODFW Native Fish Investigations Project

  2. Motives • To address data gaps outlined in the Native Fish Status Review (ODFW 2005). • To provide better management for future fishing opportunities. • To write effective conservation plans for all Great Basin SMUs. • To assess the response of fish populations to changes in climatic conditions.

  3. Objective To design and test a sample strategy capable of assessing status and trends of redband trout at the SMU and population scales.

  4. Project Scope SMUs = Six interior basins of the Great Basin

  5. Project Scope Populations = groups of fish potentially able to reproduce in the same place and same time.

  6. 30 sites in each of 8 populations. Each population sampled every 3 years. Methods • Select sample sites throughout the potential distribution of redband trout using EMAP protocol. • 30 sites in each SMU every year.

  7. Land Ownership of Great Basin Redband Trout Habitat

  8. Methods • Conduct 2-pass removal density estimates at each site using electrofishing techniques. • Calibrate removal estimates by also conducting mark-recapture estimates at a portion of sites. • Collect stream habitat data at each site

  9. Analysis • Generate estimates of redband trout parameters at SMU and populations scales using EMAP statistical algorithms. • Abundance • Distribution • Size-age composition • Degree of uncertainty • Time series trends • Fish-habitat relationships • Effects of climate variation

  10. Annual Budget USFWS – SFR $164,700 ODFW $20,000 Miscellaneous $10,000 Total $194,700

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