Movements of Yellowstone grizzly bears
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Abstract
Ninety-seven grizzly bears Ursus arctos horribilis were radio-located 6299 times during 1975–1987. Annual range sizes differed by sex, age, reproductive status and amount of precipitation. Females exhibited greater fidelity to seasonal and annual ranges than males. Weaned female offspring generally remained in the vicinity of the maternal range, while weaned males often made substantial movements to unexplored country. Average total home range size was 884 km2 for females and 3757 km2 for males. Males consistently exhibited greater indices of movement and range sizes than females. All cohorts had larger mean ranges during this study than during the period 1959–1969 when the population had access to open garbage dumps. Movements and elevational distribution of all cohorts were related to availability of whitebark pine Pinus albicaulis seeds. We hypothesized that females with cubs-of-the-year and yearlings were displaced from most productive habitats during seasons and years of limited food availability.
Study Area
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | Movements of Yellowstone grizzly bears |
Series title | Biological Conservation |
DOI | 10.1016/0006-3207(91)90044-A |
Volume | 58 |
Issue | 1 |
Year Published | 1991 |
Language | English |
Publisher | Society for Conservation Biology |
Publisher location | Barking, Essex England |
Contributing office(s) | Northern Rocky Mountain Science Center |
Description | 27 p. |
Larger Work Type | Article |
Larger Work Subtype | Journal Article |
Larger Work Title | Biological Conservation |
First page | 41 |
Last page | 67 |
Country | United States |
State | Idaho;Montana;Wyoming |
Other Geospatial | Yellowstone National Park |
Online Only (Y/N) | N |
Additional Online Files (Y/N) | N |
Google Analytic Metrics | Metrics page |