Behavior, biochemistry, and hibernation in black, grizzly, and polar bears
TL;DR
Bears don't eat, drink, urinate, or defecate during hibernation (5-7 months)
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This classic paper established the remarkable fact that bears don't eat, drink, urinate, or defecate for up to six months during hibernation - yet emerge healthy. The metabolic recycling mechanisms described have implications for understanding how organizations can maintain health during prolonged operational shutdown.
Key Findings from Nelson et al. (1983)
- Bears don't eat, drink, urinate, or defecate during hibernation (5-7 months)
- Urea is recycled rather than excreted
- Muscle mass and bone density are preserved despite immobility
- Hibernation patterns similar across black, grizzly, and polar bears
Cited in 6 pages
Mechanism Hibernation & Reserve Strategy Organism Grizzly Bear Organism Polar Bear Citation Protein turnover in muscle and liver during hibernation Citation Grizzly bears and black bears prevent trabecular bone loss during disuse (hibernation) Citation Hibernation in black bears: independence of metabolic suppression from body temperature