BIO120H1 Lecture Notes - Lecture 15: Blubber, Evaporation
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BIO120H1 Full Course Notes
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Physiological ecology of animals: heat balance lecture 15. Radiation (body will re-radiate if it is warmer than the environment) Evaporation (work with convection and cause greater loss of heat energy, usually from heated body) At colder environment, homeotherms (they regulate heat balance to keep their internal temperatures within a narrow range through thermal regulations) are usually larger. In tropical areas, organisms tend to maximize surface area to volume ratio. Organisms restricted in cold habitats have minimum surface area to volume ratio an example is the pika, they have reduced ears and spherical shape. That allow them to conserve heat better and enable them to live in rock piles. Alle(cid:374)"s rule: homeotherms tend to have smaller limbs at colder environments. Sheep has thick layer of fur as insulation. Seal has inside insulation to provide energy as blubber has higher calorie content then carbohydrates and protein although thick layer of blubber makes them heavier but water provides buoyancy for them to float.
