Physical Sciences and Mathematics Commons^™

Fisher Population Ecology On The Hoopa Valley Indian Reservation, Northwestern California, Sean Michael Matthews

Open Access Dissertations

I studied aspects of fisher (Martes pennanti) population ecology on the Hoopa Valley Indian Reservation in northern California to fill critical information gaps relative to timber management and its effect on the status of fishers, a candidate for listing under the U.S. Endangered Species Act. A decline in mark-resight density estimates of fishers from 1998 (52/100 km2; 95% CI = 43-64) to 2005 (14/100 km2; 13-16) was likely due to changes in prey habitat suitability, increased predation pressure, and/or disease. The decline was also indicated by catch-per-unit effort indices, but not by camera station or track-plate station indices. Colleagues and …