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Diets and Abundances of Three Sympatric Shrew Species in Northern Hokkaido

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タイトル: Diets and Abundances of Three Sympatric Shrew Species in Northern Hokkaido
著者: Ohdachi, Satoshi 著作を一覧する
キーワード: dietary niche
food availability
guild structure
発行日: 1995年 6月
出版者: Mammalogical Society of Japan
誌名: Journal of the Mammalogical Society of Japan
巻: 20
号: 1
開始ページ: 69
終了ページ: 83
抄録: The diets and abundances of three sympatric shrew species (Sorex unguiculatus, S. gracillimus, and S. caecutiens), food resource conditions, and environmental characteristics were investigated in three habitat types (riparian forest, wind-shelter belt, and spruce forest), during seasons without snow-cover in northern Hokkaido, Japan. S. unguiculatus outnumbered S. gracillimus in both the riparian forest and wind-shelter belt, and vice versa in the spruce forest. S. caecutiens was rare in the study area. Abundances of S. unguiculatus and S. gracillimus seemed to be unrelated to those of their principal foods. The main prey of S. unguiculatus was earthworms, whereas S. gracillimus and S. caecutiens mainly consumed small terrestrial arthropods. S. unguiculatus tended to consume more earthworms in the spruce forest than in the other habitat types. The earthworm consumption appeared to directly reflect their availability per capita. Food consumption by S. gracillimus tended to be constant regardless of the habitat type.
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 大舘 智志


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