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Demography of the Yellowstone grizzly bears

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Demography of the Yellowstone grizzly bears; 1999; Article; Journal; Ecology; Pease, C. M.; Mattson, D. J.

Summary

We undertook a demographic analysis of the Yellowstone grizzly bears (Ursus arctos) to identify critical environmental factors controlling grizzly bear vital rates, and thereby to help evaluate the effectiveness of past management and to identify future conservation issues. We concluded that, within the limits of uncertainty implied by the available data and our methods of data analysis, the size of the Yellowstone grizzly bear population changed little from 1975 to 1995. We found that grizzly bear mortality rates are about double in years when the whitebark pine crop fails than in mast years, and that the population probably declines when the crop fails and increases in mast years. Our model suggests that natural variation in whitebark [...]

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Type Scheme Key
local-index unknown 1015975
local-pk unknown 1015975
series unknown Ecology

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citationTypeArticle
journalEcology
languageEnglish
parts
typevolume
value80
typeissue
value3

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