Home range, daily movements, and reproductive biology of brown bear in southcentral Alaska (Ursus arctos)

Publication Type:Journal Article
Year of Publication:1982
Authors:Ballard, WB, Miller, SD, Spraker, TH
Journal:Canadian Field Naturalist
Volume:96
Pagination:Pagination missing - please provide
Date Published:1982
Keywords:Ursus arctos
Abstract:

Home ranges of adult female Ursus arctos averaged 408 km2, while those of adult males averaged 769 km2. Daily movement of males averaged 7.7 km/d, while females averaged 7.0 km/d. Most bears entered dens in late October and emerged between 9 April and 12 May. Most females become reproductively mature at 4.5 y; in 3 cases females successfully bred at 3.5 y. Typical breeding intervals were 3 y. Average size of 17 cub and yearling litters was 1.9: high rates of cub loss were observed. Breeding activity was concentrated in May and June. Relative to most other North American brown bear populations, brown bears in Interior Alaska had larger home ranges, females reached sexual maturity at younger ages, and weaning of litters occurred earlier. "

Taxonomic name: 
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