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Hibernation can also cause high δ15N values in cave bears: A response to Richards et al
- Instituto Universitario de Xeoloxía “Isidro Parga Pondal,” Universidade da Coruña, E-15071 A Coruña, Spain
To the Editor:
A recent paper Richards et al. (1) shows the highest δ15N values of fossil collagen in adult cave bears found until now. The reviewing of previous papers makes them propose, as the only viable explanation, an omnivorous feeding for these specimens. However, they erroneously quote the hypothesis shown in our paper (2) in …
*To whom correspondence should be addressed. E-mail: xeaurora{at}udc.es
