The smaller and more common Pacific and American Marten (Martes caurina/M.americana)which overlap in range with the Fisher are the species' most often mistaken for a Fisher. The largest member of the mustelid family, the Wolverine overlaps in habitat with the Fisher as well, and while significantly larger and less arboreal may also be misidentified as a Fisher.
Loss of forested habitat and critical features such as denning sites is considered the main long-term threat to Fisher populations throughout its range.
Increase in access associated with forest harvesting may increase targeted and incidental trapping and subsequent mortality, possibly diminishing local populations. Trapping can also alter the balance of reproductive age adults in local populations, pot
Resource based and extractive land use activities (e.g. logging, gas, oil and mineral exploration and extraction, hydro projects, recreational and backcountry uses) which contribute to the fragmentation, loss or significant alteration of critical habita
Fisher are particularly sensitive to disturbance from motorized backcountry recreational activities, which increase as backcountry areas become opened up after logging or similar resource extraction activities occur.
In the US Pacific Northwest, use of pesticides (i.e anticoagulant rodenticides) especially in forestry operations and illegal marijuana plantations are an emerging threat. Fishers are attracted to the rodenticide laced baits and or eat affected rodents
Apply conservation and management objectives as set out in the Identified Wildlife Provisions for this species found in “Accounts and Measures for Managing Identified Wildlife – Accounts V. 2004 Fisher Martes pennanti and in the “Status of the Fisher in British Columbia”. Integrate complimentary objectives and practices found in “Wildlife Guidelines for Backcountry Tourism/Commercial Recreation in British Columbia”.
Inventory and monitor using standardized methods found in Resource Information Standards Committee #24: Inventory Methods for Marten and Weasels Version 2.0.
New learning outcomes and research for Fishers in BC can be found through the BC Fisher Habitat Working Group (see link).
This species is Identified Wildlife under the BC Forest and Range Practices Act and subject to protections and prohibitions under the BC Wildlife Act. Trapping for Fisher is closed due to conservation concerns, trappers are encouraged to notify and submit any incidentally killed fisher to the nearest Ministry of Environment office. Habitat for this species may also be governed under provincial and federal regulations including the Fish Protection Act and Federal Fisheries Act as well as Regional and local municipal bylaws.