Large mammals living in temperate climates frequently have difficulty finding food during winter. It is well known that they lower their metabolism at this time but does this represent a mechanism for coping with less food or is it merely a consequence of having less to eat? The puzzle has been solved at least for the red deer by the group of Walter Arnold at the Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna. The results are published in the "Journal of Experimental Biology".

 

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