Brown bears have evolved complex physiological adaptations for hibernation. Understanding these informs both wild bear conservation and captive bear welfare management.
Brown bear welfare requires understanding the species' extraordinary seasonal physiology. In the wild, the hyperphagia-hibernation cycle governs bear biology and behavior across most of the year. Captive bears maintained in facilities without appropriate winter conditions — temperature variation, reduced disturbance, denning space — cannot complete normal physiological cycles. Females denied appropriate denning conditions for birth show elevated stress responses. The bear bile farming industry in Asia keeps bears in permanent crush cages to extract bile from gallbladders through catheterization — one of the most severe institutionalized animal welfare violations globally. Captive bear welfare requires facilities that support natural seasonal cycles and eliminate practices that prevent normal physiological expression.