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14 Cards in this Set
- Front
- Back
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Predation Coefficients
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coefficients that measure the efficiency of predation - for the prey, it is the proportion of encounters that result in the death of a prey individual; for the predator, it is the proportion of encounters that result in the death of a prey individual multiplied by the proportion of a new predator individual contributed by a prey individual
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Oscillations
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cycles in population size over time; repeating changes in population size over time
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Convergent Oscillations
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oscillations in which the amplitude gets smaller over time
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Functional Response
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a change in the rate of predation by an individual predator in response to a change in the density of prey
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Type I Functional Response
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no matter how many prey individuals are around, the predator individuals take them at the same rate
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Type II Functional Response
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as the number of prey individuals increases, the predators take them at an increasingly slower rate
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Satiation
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no matter how badly an individual wants to eat more, sometimes it just can’t; the state produced by having hunger fulfilled
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Type III Functional Response
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as the number of prey individuals increases, the predators take them at a greater rate initially, but eventually take them at an increasingly slower rate; similar to a Type II functional response, but with a lag at the beginning
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Density-dependent Stimulus
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a stimulus that increase in strength with increasing numbers of prey individuals
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Search Image
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a model for visual (or other sensory) comparison, formed as part of the behavioral mechanism by which individual predators select certain prey types but ignore others, thereby optimizing their foraging efficiency
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Divergent Oscillations
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oscillations in which the amplitude increases over time
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Predation coefficients relate:
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the number of prey killed to the production of predator offspring.
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The functional response relates:
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the rate of prey consumption by an individual predator to the number of prey individuals
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Predation occurs when:
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individuals in one species-population each kill multiple individuals in one or more other species-populations to use them as a resource
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