Animal Energetics: Cost Of Living

Front 1

periodic endothermy

Back 1

endothermic only when necessary

ex. insects warm up to fly but are ectothermic at rest

Front 2

regional endothermy

Back 2

keep important parts of the body warm

ex. human keep core warm

Front 3

How do endotherms deal with seasons where food is not available?

Back 3

live on stored fat

migrate

hibernation and torpor

Front 4

Limits to sustainable energy

Back 4

maximum sustainable MR of an ectotherm is roughly the same as minimum MR (BMR) of an endotherm

Front 5

average energy costs

Back 5

average rate of energy used

is a measure of food requirements

Front 6

what is the energy used for

Back 6

most for:
resting or basal metabolism

activity

in small endotherms, body temperature regulation

a little for:

growth and reproduction

Front 7

how does activity duration affect power output

Back 7

endotherms- can do both endurance and sprint exercise

ectoderms- cannot sustain intense activity

Front 8

advantages of endothermy

Back 8

-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

Front 9

advantages of ectothermy

Back 9

-body temp=environment temp

-can thrive in food poor habitats

-if habitat permits, behavior can keep Tb constant at little cost

Front 10

disadvantages of ectothermy

Back 10

-limited range of tolerable measures

-body temp may not be stable

-limited exercise endurance

Front 11

disadvantages of endothermy

Back 11

-expensive in food requirements