Animal Environmental Adaptation Flashcards

1
Q

Overwintering Physiology of Insects in

Arctic and Subarctic Alaska:

Strategies of Freeze Tolerance and Freeze Avoidance

A
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2
Q

Supercooling Graph

A

When a liquid freezes and changes phase into a solid, free-energy is released as heat that creates an exotherm.

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3
Q

How do organisms deal with variation in temperature?

A

Regulation

  • Homeotherm – animal that maintains constant body temperature
  • Poikilotherm – animal with variable body temperature

–Source of body heat

  • Endotherm – animal whose primary source of body heat is metabolism
  • Ectotherm - animal whose primary source of body heat is the environment
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4
Q

Ectothermy

A

•Ecological advantages

–Less food, water needed

–Energy/water demands decrease in cold, when food/water availability low

–Poor habitats are still potentially viable living spaces

–Can withstand periods of drought/famine

–Can be small

•Disadvantages

–Vulnerable to predation when cold

–Low aerobic capacity (can’t sprint)

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5
Q

Endothermy

A

•Ecological advantages

–High aerobic activity possible

–Can more easily be nocturnal

–Can escape from predators at range of temperatures

•Disadvantages

–Constant supply of abundant food and water needed

–Food/water demands increase when weather cold, food/water availability low

–Limits habitats available

–Trouble being small

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6
Q

Ectothermic poikilotherms

A

In Ectothermic poikilotherms metabolism and Tb vary with environmental temperature

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7
Q

Endothermic homeotherms

A

Endothermic homeotherms use metabolism to regulate Tb

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8
Q

Aqargiq

A
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9
Q

Endothermy and Animals Graph

A
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10
Q
A
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11
Q
A
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