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Quantification of the Vital Rates, Abundance, and Status of a Critical, Endemic Population of Bonneville Cutthroat Trout
North American Journal of Fisheries Management (2007)
  • Phaedra Budy, Utah State University
  • Gary P. Thiede
  • Peter McHugh
Abstract

Most subspecies of cutthroat trout Oncorhynchus clarkii are imperiled or extinct due to the combined effects of habitat degradation and interactions with exotic species. To quantify abundance and vital rates and evaluate trends, we selected a large population of Bonneville cutthroat trout O. clarkii utah from the Logan River of northern Utah, a river characterized by high-quality and connected habitat. Over a 5-year period, we completed a comprehensive population assessment, including depletion-based abundance estimates and a mark–recapture study (1,050 tagged fish) of site fidelity, growth, and survival. Population density exceeded 1,500 cutthroat trout/km at high-elevation sites; this is substantially higher than most other reported densities of inland, stream-type cutthroat trout...

Keywords
  • Quantification,
  • Survival,
  • Site-Fidelity,
  • Abundance,
  • Trend,
  • Population,
  • Endemic,
  • Cutthroat Trout
Disciplines
Publication Date
2007
Citation Information
Budy, P., G.P. Thiede, P. McHugh. 2007. A quantification of survival, site-­‐fidelity, abundance, and trend for an important population of endemic cutthroat trout. North American Journal of Fisheries Management 27:593-­‐604.