作者
Egle Vulla, Keith A Hobson, Marju Korsten, Malle Leht, Ants-Johannes Martin, Ave Lind, Peep Männil, Harri Valdmann, Urmas Saarma
发表日期
2009/12
期刊
Annales zoologici fennici
卷号
46
期号
6
页码范围
395-415
出版商
Finnish Zoological and Botanical Publishing Board
简介
Omnivores exploit numerous sources of protein and other nutrients throughout the year, and meat is generally considered a high-quality resource. However, it is unknown if there is any general association between latitude and carnivorous behavior in omnivorous mammals. We examined the relative importance of meat and other dietary components, including anthropogenic food items, in the diet of brown bears (Ursus arctos) in Estonia using conventional scat- and stomach-content analyses as well as stable-isotope (δ15N, δ13C) analyses. When food habits of brown bears in Estonia were compared with those of other populations in central and northern Europe, the proportion of animal prey in the diet was positively correlated with latitude. Further comparison with the data on the diet of two other omnivorous mammals, the European badger (Meles meles) and the European pine marten (Martes martes), provides …
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