Abstract
A very rich assemblage of ancient brown bears (Ursus arctos arctos Linnaeus, 1758) from Mont Ventoux caves (France) has been investigated using carbon and nitrogen isotopic composition of bone collagen. The isotopic data showed that these bears were feeding in an open environment and consumed mainly plant food items. The access to livestock meat appeared to have been much more limited for these ancient brown bears than for 20th-century Pyrenean bears, suggesting that husbandry patterns had kept bears away from domestic herds. The isotopic variations observed are large according to the ontogenic stage of the bears when they died, which could be accounted for by the isotopic changes that occur during hibernation of the lactating female bear and by different time periods averaged in bone collagen, and without the need to involve different food resources for cubs relative to adult bears.
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