Optimal Foraging: Where to eat?

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  • Created by: Dazza_G
  • Created on: 07-12-16 16:01
What are the rules of thumb for exploiting patches?
The Number rule, the Time rule, the Giving-Up time rule and the Rate rule.
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What is the Number rule?
Leave after catching n prey.
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What is the Time rule?
Leave after t time units on patch.
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What is the Giving-Up time rule?
Leave after t time units of unsuccessful searching.
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What is the Rate rule?
Leave when capture rate drops to a critical value r.
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What does the Marginal value theory state?
Optimal foragers should stay in a patch until its rate of intake drops to an average level of intakee for the patches in the habitat.
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What does the Marginal value theory predict?
Foragers will exploit patches for longer when patch quality is higher and travel times between patches are longer and leave them when the opposite is true.
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What are the assumptions of the Marginal value theory regarding the forager?
The forager controls when they leave the patch to maximise resource intake, and they deplete the resources so the rate of resources within the patch decreases as a function of time spent there.
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What are the assumptions of the Marginal value theory regarding the patches?
Patches are equal in quality or if they are variable in quality they re distributed randomly throughout the environment.
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What are the predictions of the Marginal value theory?
All patches should be reduced to the same marginal value, and the marginal value should equal the average intake for the habitat.
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Other cards in this set

Card 2

Front

What is the Number rule?

Back

Leave after catching n prey.

Card 3

Front

What is the Time rule?

Back

Preview of the front of card 3

Card 4

Front

What is the Giving-Up time rule?

Back

Preview of the front of card 4

Card 5

Front

What is the Rate rule?

Back

Preview of the front of card 5
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