In Katmai National Park, that most often means salmon. Juvenile bears living on their own for the first time must navigate a gauntlet of hazards to establish a home range and find food without mother’s guidance.īears gorge on the richest, most easily obtainable foods they can find. Bear cubs experience the same hunger as older bears but also undergo tremendous growth spurts. Female bears need to gain weight for their own survival as well as to support the birth and growth of cubs. Adult males need to grow large to dominate the best fishing spots and secure mating opportunities. Katmai’s brown bears are at their fattest in late summer and early fall after a summer spent trying to satisfy their profound hunger.Įach bear faces its own challenges in order to gain the body mass necessary to survive. Their winter survival depends on accumulating ample fat reserves before entering the den. During hibernation, bears will not eat or drink and they will lose one-third of their body weight. The competition bracket for Fat Bear Week 2020.Įach winter, curled snug in their dens, brown bears endure a months-long famine.
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