Tag: trappers

December 13, 2019

JWM: Are southwest Canada wolverines being overharvested?

Trappers may be harvesting wolverines at unsustainable levels in the south of their range in the Canadian Rockies, according to new research. Maintaining population numbers in this area can be...

December 10, 2019

JWM: Two similar species have different responses to climate

Trappers in Quebec have been noticing an unusual shift on their lines taking place over the past few decades. Fishers have been on the rise, while martens have been declining....

September 18, 2017

JWM study: Evidence shows muskrats declining in U.S.

Trappers and furbearer biologists have been reporting since the mid-1980s that muskrats (Ondatra zibethicus) seemed to be appearing in fewer and fewer numbers, but they only had anecdotal evidence, until...

November 21, 2016

JWM study: How much snow cover do female wolverines need?

Spring snow cover in northern Alberta has been decreasing for decades. This shift is generally not expected to bode well for cold-adapted wildlife, such as the elusive and charismatic wolverine...