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Ecology: Lectures 14 & 15 Predation, Parts 1 & 2
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Lotka-Volterra equation: Prey isocline (dV/dt = 0)
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Lotka-Volterra equation: Predator isocline (dC/dt = 0)
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Lotka-Volterra model: with both predator and prey isoclines
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Lotka-Volterra prediction: Predator-prey flux through time
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Rosenzweig-MacArthur: Stable cycle
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Rosenzweig-MacArthur: Stable/dampened oscillations
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Rosenzweig-MacArthur: Unstable/increasing oscillations
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Rosenzweig-MacArthur: Refuge
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Gause’s predation experiments: Didinium predation on Paramecium
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Huffaker’s experiments: mite predation and complex environments
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Pimentel et al. experiments Used parasitoid wasps and host flies as predator and prey Created metapopulations
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Functional responses of predator to prey concentrations Type 1 response:
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Functional responses of predator to prey concentrations Type 2 response:
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Functional responses of predator to prey concentrations Type 3 response:
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Tinbergen’s search image hypothesis for Type 3 responses http://www-rohan.sdsu.edu/~jmahaffy
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Prey switching
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Aggregative response
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Optimal foraging example
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Lynx and hare cycling
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Hare and winter vegetation (“browse”) cycling
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