Understanding rates and causes of grizzly bear (Ursus arctos) mortality is critical to their conservation. Using data obtained from 13 study areas in the Rocky and Columbia mountains of Alberta, British Columbia, Montana, Idaho, and Washington, we estimated survival rates and causes of mortalities for 388 grizzly bears radio-collared for research purposes between 1975 and 1997. We found that people killed 77–85% of the 99 bears that were known or suspected to have died while radio-collared. In jurisdictions that allowed grizzly bear hunting, legal harvest accounted for 39–44% of the deaths. Other major causes of mortality included control killing for threatening human habitation or property, self-defence, and malicious killings. The mortality rate due to hunting was higher for males than females, and subadult males had a higher probability of being killed as problem animals than did adult males or females. Adult females had a higher mortality rate from natural causes than males...
McLellan, Bruce N., Hovey, Fred W.; Woods, John G.. 1999. Rates and Causes of Grizzly Bear Mortality in the Interior Mountains of Western North America (in Proc. Conference Biology & Management of Species and Habitats at Risk). Ministry of Environment, Lands and Parks; University College of the Cariboo. Conference Biology & ManagementProceedings
Topic: Species and Ecosystems at Risk
Keywords: Alberta, British Columbia, grizzly bear, hunting, Idaho, Montana, poaching, problem wildlife, protected areas, survival rate, Ursus arctos, Washington
Scientific Name: Ursus arctos
English Name: Grizzly Bear
Other Identifier: University College of the Cariboo
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