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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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