Relates to all activities in the search and exploitation of resources.
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What does foraging consider?
Patch choice, travelling time to patch, prey choice, handling time
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How does an animal decide where to hunt?
Ideal free distribution model and optimal foraging theory
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How does an animal decide what to eat?
Narrow range of species (specialised feeders) Large range of species (generalised feeders)
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What does the optimal foraging theory look at?
Food clumped, exploitation of resource patchiness, Highest energetic returns over time, patch quality decreases with time
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What is the optimal path time?
When the gradient (energy gain) is at a tangent. after this the animal is not gaining any energy and will move onto the next patch.
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What will each prey item have according to the OFT?
An energy value, encounter rate and a handling time.
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Give an example of the Optimal foraging theory?
One prey item is encountered every 3 mins (encounter rate) Takes 2 mins to kill and ingest (handling time) provides forager with 300 calories (energy value)
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What are the two assumptions for the Optimal Foraging theory?
1. Foragers rank food types in terms of profitability. 2.Foragers should always include the most profitable prey
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What does the Marginal Value Theorem suggest?
When foragers should leave-rate of intake in the patch reaches a threshold value.
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Other cards in this set
Card 2
Front
Patch choice, travelling time to patch, prey choice, handling time
Back
What does foraging consider?
Card 3
Front
Ideal free distribution model and optimal foraging theory
Back
Card 4
Front
Narrow range of species (specialised feeders) Large range of species (generalised feeders)
Back
Card 5
Front
Food clumped, exploitation of resource patchiness, Highest energetic returns over time, patch quality decreases with time
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