ANSC 3180 Lecture Notes - Lecture 10: Torpor, Aestivation, Food Energy
24 Apr 2019
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An animal"s energy supply comes only from food (food energy may be used to deposit body fat) Some animals switch to another less desirable food source. Some go to where food is available = migration. Some reduce energy requirements, by reducing body temp (tb) = seasonal hibernation, daily torpor. Reducing energy requirements, by reducing body temperature. Maintain a relatively constant core body temp (tb) despite wide fluctuation in environmental temp (ta) Tb determined by heat from body metabolism (endothermic) Tb determined by heat sources outside the body (ectothermic) Passing the winter in a torpid or resting state. An animal or plant spending the winter in a dormant state. Hibernation (and aestivation (hibernation that takes place in hot areas)) Torpor (short periods, not dropping temp to close to freezing) < 24 hr, daily = short-term torpor. It would take hours to rewarm for hibernation. > 4 days, seasonal = prolonged = hibernation.
