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Major components of grizzly bear diet across North America

Dates

Year
2006

Citation

Mowat, Garth, and Heard, Douglas C., 2006, Major components of grizzly bear diet across North America: Canadian Journal of Zoology/Revue Canadienne de Zoologie, v. 84, no. 3, p. 473-489.

Summary

We measured stable carbon and nitrogen isotope ratios in guard hair of 81 populations of grizzly bears (Ursus arctos L., 1758) across North America and used mixing models to assign diet fractions of salmon, meat derived from terrestrial sources, kokanee (Oncorhynchus nerka (Walbaum in Artedi, 1792)), and plants. In addition, we examined the relationship between skull size and diet of bears killed by people in British Columbia. The majority of carbon and nitrogen assimilated by most coastal grizzly bear populations was derived from salmon, while interior populations usually derived a much smaller fraction of their nutrients from salmon, even in areas with relatively large salmon runs. Terrestrial prey was a large part of the diet where [...]

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  • LC MAP - Landscape Conservation Management and Analysis Portal
  • Northwest Boreal Landscape Conservation Cooperative

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Reference Item
NWBLCC20160627

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ISSN http://sciencebase.gov/vocab/identifierScheme 0008-4301

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