Growth, Sexual Dimorphism, and Geographical Variation of Skull Dimensions of the Brown Bear Ursus arctos in Hokkaido

Ohdachi, Satoshi; Aoi, Toshiki; Mano, Tsutomu et al.

Journal of the Mammalogical Society of Japan, 1992, 17(1), 27-47

Permalink : https://hdl.handle.net/2115/44439

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アクセス権	open access
URI	https://hdl.handle.net/2115/44439
タイトル	Growth, Sexual Dimorphism, and Geographical Variation of Skull Dimensions of the Brown Bear Ursus arctos in Hokkaido
著者	Ohdachi, Satoshi ; Aoi, Toshiki ; Mano, Tsutomu ; Tsubota, Toshio
e-Rad_Researcher 60292041 著者名 Ohdachi, Satoshi
著者名 Aoi, Toshiki
著者名 Mano, Tsutomu
著者名 Tsubota, Toshio
言語	英語
キーワード	Growth
	Sexual dimorphism
	Bergman's rule
	Brown bear
発行日	1992-05
出版者	Mammalogical Society of Japan
収録物名	Journal of the Mammalogical Society of Japan
巻(号)	17(1)
ページ	27-47
抄録	The growth, sexual dimorphism, and geographical variation in skulls of 596 brown bears (Ursus arctos) hunted in Hokkaido, Japan from 1971 to 1986 were investigated. Most cranial traits continued to increase after the age of sexual maturity, and in particular skulls became progressively wider with age. Skulls of males, even those of cubs and yearlings, were larger than those of females, and the difference became significant after two years of age. Skull dimensions tended to increase from south to north, in Hokkaido, and bears from the north-eastern region possessed higher brain cases and longer mandibles relative to skull length and width, than those in the southern region.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	0914-1855