Hibernation in black bears: independence of metabolic suppression from body temperature.

  title={Hibernation in black bears: independence of metabolic suppression from body temperature.},
  author={\Oivind T\oien and John A. Blake and Dale M. Edgar and Dennis A. Grahn and H. Craig Heller and Brian M. Barnes},
  volume={331 6019},
Black bears hibernate for 5 to 7 months a year and, during this time, do not eat, drink, urinate, or defecate. We measured metabolic rate and body temperature in hibernating black bears and found that they suppress metabolism to 25% of basal rates while regulating body temperature from 30° to 36°C, in multiday cycles. Heart rates were reduced from 55 to as few as 9 beats per minute, with profound sinus arrhythmia. After returning to normal body temperature and emerging from dens, bears… CONTINUE READING
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