Tanner Humphries

Photo of Humphries, Tanner

Tanner Humphries

M.S. student, Wildlife Biology

Research Interests

Species reintroductions have become a common management strategy to re-establish species to their historical range while helping to restore ecosystem integrity. Fishers (Pekania pennanti) historically occurred in Washington State before they were extirpated in the early 1900s due to human pressures. Following the listing of the fisher as an endangered species in the state of Washington in 1998, a collaborative effort between state, federal and non-profit organizations was formed to reintroduce and restore fishers to the Cascade Range in Washington. At the reintroduction sites, differences in prey abundance and competitor or predator densities could affect home range establishment and whether fisher recovery is successful. My research investigates the effects of interspecific competition and prey availability on habitat selection by reintroduced fishers in the North Cascades. This information will contribute to our understanding of predator-prey dynamics in a newly sympatric ecosystem. Understanding these components of the ecosystem will also provide significant resource management insights and baseline data that will be immensely valuable for monitoring of carnivore populations into the future.