2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 3:00 PM - 3:15 PM | PRIORITIZATION OF MANAGEMENT ACTIONS FOR A THREATENED TROUT USING MULTIPLE POPULATION VIABILITY ANALYSIS | 150 DEF
PRIORITIZATION OF MANAGEMENT ACTIONS FOR A THREATENED TROUT USING MULTIPLE POPULATION VIABILITY ANALYSIS
Managers of at-risk species frequently need to prioritize actions based on questions such as “Which populations are most at-risk of extirpation?”, “Which would benefit most from management?” or “Where could we reintroduce viable populations?”, but limitations of traditional modeling approaches often hamper empirical guidance — especially for species comprising many isolated populations across broad geographies. The federally-listed Lahontan cutthroat trout (LCT) is one such species, for which there has been little quantitative foundation to guide range-wide management and recovery. We employed a recently-developed Multiple Population Viability Analysis model (MPVA), customized for LCT using all count data from backpack electrofishing surveys (1985-2015) and a suite of environmental and biological covariates, to address priority questions identified with management partners. Across 211 streams where LCT populations currently exist or may be reintroduced, we: 1) ranked extinction risk for current populations range-wide, 2) quantified the benefit of removing non-native trout and 3) estimated viability for LCT reintroduced to unoccupied waters using different protocols. Due to effective collaboration among academic, non-profit, state and federal entities, and development of a decision support tool, data-driven results are being incorporated directly into LCT management prioritization and recovery planning.
- Modeling
- Monitoring
- Remote Sensing
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Presenters/Authors
Helen Neville
(), Trout Unlimited, hneville@tu.org;
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Doug Leasure
(), University of Georgia, doug.leasure@gmail.com;
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Daniel Dauwalter
(), Trout Unlimited, ddauwalter@tu.org;
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Jason Dunham
(), U. S. Geological Survey, jdunham@usgs.gov;
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Mary Peacock
(), University of Nevada Reno, mpeacock@unr.edu;
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Kurt Fesenmyer
(), Trout Unlimited, Boise, ID, KFesenmyer@tu.org;
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Robin Bjork
(), Trout Unlimited, rdbjork@hotmail.com;
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Nathan Chelgren
(), USGS, nchelgren@usgs.gov;
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Charlie Luce
(), US Forest Service, Rocky Mountain Research Station, cluce@fs.fed.us;
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Daniel Isaak
(), Research and Development, United States Forest Service, Boise, Idaho 83702, disaak@fs.fed.us;
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Lee Annn CarranzA
(), U.S. Fish and Wildlife Service, Lee_carranza@fws.gov;
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Jon Sjoberg
(), Nevada Department of Wildlife, sjoberg@ndow.org;
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Seth Wenger
(), Odum School of Ecology, University of Georgia, swenger@uga.edu;
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