Biology 2601A/B Lecture : Hibernation - Guest Lecture study guide that includes all the notes and relevant pictures from lecture as well as additional notes from the assigned readings
16 Oct 2011
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Hibernation is an ancestral feature; some orders have lost this feature. Larger animals tend not to hibernate; small animals more likely to. It is questionable whether bears hibernate winter lethargy . Monotremata, marsupialia, pholidota, rodentia, primates, chiroptera, insectivore, carnivores, and dermoptera; in each of these at least one member hibernates. Mammals and birds are endothermic (use their metabolism as a source of heat) homeotherms (maintain a constant body temperature) During the summer months, food availability is high, and the metabolic rate is close to. Bmr because the animal doesn"t need to keep itself warm (therefore won"t need to expend energy) At 10 c, mr = 4 ml o2 / g/ hr. Therefore, mr = 400 ml o2 / hr for whole animal. = 0. 4 l o2 / hr for whole animal. 24 hrs/day x 100 days = 2400 hours. Therefore, over the entire winter, the whole animal consumes 960l o2. 1 l o2 corresponds to 5 kcal of energy consumed.
