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19 Cards in this Set
- Front
- Back
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optimal foraging theory |
assumes natural selection has favored feeding behaviors that maximize fitness fitness while feeding is a positive function of energy intake rate |
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optimal behavior |
the behavior that maximizes fitness |
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handling time |
amount of time needed to manipulate a food item so it is ready to eat |
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profitability |
energy of a food item divided by its handling time |
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generalist |
forager that eats a wide variety of food types |
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specialists |
foragers with restricted diets |
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zero-one rule |
each food type should either always be eaten when found or always be rejected |
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partial preference |
acceptance of a food items some fraction of the time |
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diminishing returns |
decline in instantaneous harvest rate as a food patch is depleted |
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marginal benefit |
benefit obtained by feeding for one more instant |
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marginal value theorem |
forager should stay in a patch until its marginal benefit of feeding declines to equal the average energy intake rate from the environment |
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energetic cost of foraging |
energy used to exploit a patch and the metabolic costs incurred while feeding |
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predation risk costs |
probability of being killed while feeding |
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missed opportunity costs |
costs of giving up other activities that might yield even higher fitness |
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quitting harvest rate |
forager's instantaneous harvest rate when it leaves a food patch |
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giving up density |
density of food items left in a food patch after being exploited by a forager |
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sample information |
information obtained by sampling an unknown parameter |
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prior knowledge |
information about a parameter prior to sampling |
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Bayesian estimation |
process of combining sample information and prior knowledge using Bayes' theorem |
