Estimates of dispersal and home-range fidelity in American black bears
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| Natura: | Recurso digital |
| Lingua: | inglese |
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2010
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| author | Costello, Cecily M |
| author_facet | Costello, Cecily M |
| contents | I examined dispersal, home-range establishment, and home-range fidelity in American black bears (Ursus americanus) using radiotelemetry data for individuals whose natal ranges were known (n = 43), individuals whose natal ranges were identified using microsatellite DNA (n = 13), and individuals whose natal ranges were unknown (n = 86). Dispersal was highly male-biased. Nearly all males emigrated 22–62 km from their natal ranges between the ages of 1 and 3 years. Some males continued to float, moving their ranges 15–68 km between successive years. Most males settled into a permanent home range by age 4 years, and all males settled by age 7 years. One 8-year-old male apparently did not disperse and resided only 7 km from his natal range. Females were more philopatric and settled 0–7 km from their natal ranges. Only 1 female moved her range >20 km at the age of 5 years. The adaptive significance of male-biased natal dispersal is discussed. |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_1644_09-MAMM-A-015R1_1 |
| institution | Zenodo |
| language | eng |
| publishDate | 2010 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Estimates of dispersal and home-range fidelity in American black bears Costello, Cecily M black bear fidelity home range natal dispersal philopatry radiotelemetry sex Ursus americanus I examined dispersal, home-range establishment, and home-range fidelity in American black bears (Ursus americanus) using radiotelemetry data for individuals whose natal ranges were known (n = 43), individuals whose natal ranges were identified using microsatellite DNA (n = 13), and individuals whose natal ranges were unknown (n = 86). Dispersal was highly male-biased. Nearly all males emigrated 22–62 km from their natal ranges between the ages of 1 and 3 years. Some males continued to float, moving their ranges 15–68 km between successive years. Most males settled into a permanent home range by age 4 years, and all males settled by age 7 years. One 8-year-old male apparently did not disperse and resided only 7 km from his natal range. Females were more philopatric and settled 0–7 km from their natal ranges. Only 1 female moved her range >20 km at the age of 5 years. The adaptive significance of male-biased natal dispersal is discussed. |
| title | Estimates of dispersal and home-range fidelity in American black bears |
| topic | black bear fidelity home range natal dispersal philopatry radiotelemetry sex Ursus americanus |
| url | https://doi.org/10.1644/09-MAMM-A-015R1.1 |