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11 Cards in this Set
- Front
- Back
periodic endothermy
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ex. insects warm up to fly but are ectothermic at rest |
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regional endothermy
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ex. human keep core warm |
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How do endotherms deal with seasons where food is not available? |
migrate hibernation and torpor |
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Limits to sustainable energy |
maximum sustainable MR of an ectotherm is roughly the same as minimum MR (BMR) of an endotherm |
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average energy costs |
is a measure of food requirements |
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what is the energy used for |
most for: activity in small endotherms, body temperature regulation a little for: growth and reproduction |
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how does activity duration affect power output
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ectoderms- cannot sustain intense activity |
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advantages of endothermy
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-permits a constant body temperature even if environmental temperature is highly variable -easiest in large animals -survive in temperatures that would be dangerous to ectoderms |
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advantages of ectothermy |
-body temp=environment temp -can thrive in food poor habitats -if habitat permits, behavior can keep Tb constant at little cost |
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disadvantages of ectothermy |
-body temp may not be stable -limited exercise endurance |
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disadvantages of endothermy
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-expensive in food requirements
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