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Fishers (Martes pennanti) are medium-sized terrestrial
carnivores of the Mustelidae family that inhabit forested
regions of central and northeastern British
Columbia. Although the extent of occurrence of
Fishers in the province is widespread, the area of occupancy
within this range is probably limited.
Fishers have a low reproductive output relative to
their lifespan, with adult females typically giving birth
to between one and three kits in late winter. Survival of
the offspring to the age of dispersal is low and further
decreases the effective reproductive output. Natural
mortalities within Fisher populations come from a
variety of sources, but Fishers have few natural predators,
probably because their speed and agility make it
difficult for other predators to catch and prey upon
them. Humans are the major source of mortality in
most studied Fisher populations, primarily from fur
trapping. It is unclear as to whether the rate of recruitment
into the Fisher population in British Columbia is
sufficient to balance the mortality rate, although this
balance probably varies both spatially and temporally.
Weir, R.D.. 2003. Status of the Fisher in British Columbia. Ministry of Water, Land and Air Protection; Ministry of Sustainable Resource Management. Species Status Report. B105
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