Is the polar bear (Ursus maritimus) a hibernator? Continued studies on opioids and hibernation.

@article{Bruce1990IsTP,
  title={Is the polar bear (Ursus maritimus) a hibernator? Continued studies on opioids and hibernation.},
  author={David S. Bruce and Nancy Darling and K J Seeland and Peter Rudolf Oeltgen and S P Nilekani and S C Amstrup},
  journal={Pharmacology, biochemistry, and behavior},
  year={1990},
  volume={35 3},
  pages={705-11}
}
Polar bear behavior and biochemistry suggest they may have the ability to hibernate year-round, even though this species is not considered to be a true hibernator. This observation, plus the discovery of a hibernation-induction trigger (HIT) in the blood of black bears, prompted the examination of polar bear blood collected throughout the year for evidence of HIT, and to determine if it displayed opioid activity, as black bear blood does. A bioassay was conducted by injecting summer 13-lined… CONTINUE READING

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