Diet of the fat dormouse (Glis glis) on the northern periphery of its distributional range

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• 作者：Rimvydas Ju?kaitis ; Laima Baltrūnait? ; Vita Augut?
• 关键词：Edible dormouse ; Feeding ; Faecal analysis ; Beech ; Oak ; Lithuania
• 刊名：Acta Theriologica
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：60
• 期：2
• 页码：155-161
• 全文大小：336 KB
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• 刊物主题：Zoology; Animal Physiology; Behavioural Sciences; Animal Ecology; Evolutionary Biology; Animal Anatomy / Morphology / Histology;
• 出版者：Springer Berlin Heidelberg
• ISSN：2190-3743

文摘

We studied the seasonal and annual variation in diet composition of the fat dormouse (Glis glis) in Lithuania, a locality situated on the northern periphery of the dormouse range and outside of the range of the European beech (Fagus sylvatica). After emergence from hibernation, dormice fed on oak acorns (from the previous year), inflorescences of various trees, vegetative parts of plants and food of animal origin (birds, their eggs and insects). In June, soft mast and seeds of birches supplemented the dormouse diet, and diet composition was the most diverse during this period. In July, raspberries and fruits of glossy buckthorn constituted the bulk of dormouse diet, but seeds of birches dominated in a specific year. Hard mast (mainly acorns) dominated the diet of G. glis from August until the beginning of hibernation in October. A high prevalence of acorns, comparatively high proportion of birch seeds and low proportion of food of animal origin in the diet, as well as feeding on fruits of glossy buckthorn, are specific features of feeding by G. glis in Lithuania. The diet of G. glis on the northern periphery of its range resembles its diet on the eastern periphery of the range where beech trees are also absent. According to the composition of G. glis diet, feeding conditions in both of these peripheral regions are poorer in comparison to central or southern regions.