Estimates of dispersal and home-range fidelity in American black bears

被引：55

作者：

Costello, Cecily M. ^{[1
,2
]}

机构：

[1] Hornocker Wildlife Inst, Bozeman, MT 59715 USA

[2] Wildlife Conservat Soc, Bozeman, MT 59715 USA

来源：

JOURNAL OF MAMMALOGY | 2010年 / 91卷 / 01期

关键词：

black bear; fidelity; home range; natal dispersal; philopatry; radiotelemetry; sex; Ursus americanus; BIASED NATAL DISPERSAL; INBREEDING AVOIDANCE; PHILOPATRY; MOVEMENTS; BIRDS;

D O I：

10.1644/09-MAMM-A-015R1.1

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

I examined dispersal, home-range establishment. and home-range fidelity in American black bears (Ursus americanus) using radiotelemetry data for Individuals whose natal ranves were known (n = 43), individuals whose natal ranges were identified using rnicrosittellite 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 it pemanent 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 philopatirc 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 diSCLIssed DOI: 10.1644/09-MAMM-A-015R1.1.

引用

页码：116 / 121

页数：6

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