Occupancy Patterns in a Reintroduced Fisher Population during Reestablishment

Release Date:

From 2008-10, researchers translocated 90 fishers from British Columbia to Washington’s Olympic Peninsula. 

Subsequent monitoring allowed researchers to assess population restoration success, evaluate modeling assumptions about suitable reintroduction areas in Washington State, and identify fisher habitat associations in the coastal Pacific Northwest. Using motion-sensing cameras and hair (DNA)-snaring devices deployed in 2013-16, researchers found that fisher occupancy was strongly associated with the boundary between wilderness and more intensively managed forest lands, which provided suitable prey in proximity to contiguous forests for resting, denning, and security. They also found evidence that fisher population distribution had not yet stabilized following translocation, and that not all habitat was fully occupied or that initial estimates of available habitat were overestimated. Genetic results indicated that at least two generations of fishers have been produced on the Peninsula. This study raises several questions to guide future research on fisher population establishment and regional habitat relationships. 

Happe, P.J., Jenkins, K.J., McCaffery, R.M., Lewis, J.C., Pilgrim, K.L., Schwartz, M.K., 2019, Occupancy patterns in a reintroduced fisher population during reestablishment: Journal of Wildlife Management, https://doi.org/10.1002/jwmg.21788

Related Content

Filter Total Items: 2
Date published: November 13, 2017
Status: Active

Mammalian Ecology and Management in Protected Areas

National parks and other protected areas are key components of the wildlife conservation landscape. The goal of wildlife managers in national parks is to preserve the ecological integrity and authenticity of natural systems for future generations. Wildlife populations of national parks, however, are in continuous flux as a result of changing land uses outside their boundaries, climate...

Contacts: Kurt J Jenkins
Date published: November 14, 2017
Status: Active

Wildlife Monitoring in National Parks

Maintaining a current understanding of ecological conditions is fundamental to the National Park Service in meeting its mission to preserve park resources in an unimpaired state for future generations. Ecological monitoring establishes reference conditions, which over time help to define the normal limits of natural variation, determine standards for comparing future changes, and identify the...

Contacts: Kurt J Jenkins