emery_lecture_17 - Lecture17 I.introtopredatorpreydynamics

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Lecture 17 I. intro to predator prey dynamics - ex: prickly pear cactus took over Australia  introduced moth to almost completely wipe it out II. predator response to prey = how predator numbers respond to changing prey numbers  (population response) = how an individual predator responds to change in prey numbers  (individual level) Functional responses - type I – eats prey in proportion to abundance - type II – reach a maximum consumption rate - type III – predator efficiency decreases at low levels – harder to find caused by: 1. handling time 2. get full (satiation)
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caused by: 1. safe sites 2. predator-switching 3. capture efficiency down because no search image Lotka-volterra predator-prey model: prey pop growth - assumptions: - in absence of predators, exponential growth dV/dt = rV where V = victim (prey) - with predator: dV/dt = rV – αVP α = capture efficiency of predator - rate unaffected if α is small
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This note was uploaded on 04/11/2011 for the course BIO 585 taught by Professor R.howard during the Winter '08 term at Purdue University-West Lafayette.

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emery_lecture_17 - Lecture17 I.introtopredatorpreydynamics

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