Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea

  title={Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea},
  author={Steven C. Amstrup and Ian Stirling and Tom S. Smith and Craig J. Perham and Gregory W. Thiemann},
  journal={Polar Biology},
Intraspecific killing has been reported among polar bears (Ursus maritimus), brown bears (U. arctos), and black bears (U. americanus). Although cannibalism is one motivation for such killings, the ecological factors mediating such events are poorly understood. Between 24 January and 10 April 2004, we confirmed three instances of intraspecific predation and cannibalism in the Beaufort Sea. One of these, the first of this type ever reported for polar bears, was a parturient female killed at her… 
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