ANTA01H3 Final: Exam Notes.docx

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Exploitation: an (+/-) interaction in which one organism benefits from feeding on and thus directly harming the other. This can reduce the growth, reproduction, and survival of organisms, decrease densities, and alter distributions. Organisms may choose to eat another organism because it supplies nutrients needed or its just is easy to capture: prey switching classic model: a predator will switch prey based on the availability. E1/e2 = c(n1/n2), where e1/e2 is the ratio of prey 1 eaten relative to prey 2 and n1/n2 is the ratio of prey 1 in habitat relative to prey 2. Together, rn is exponential growth, anp is removal of prey by predators, banp is exponential growth depending on predators ability to turn prey into births, and mp is the death rate. The capture efficiency, which depends on how frequently predators and prey encounter one another, np. Prey decreases when p> r/a and increases when p< r/a.

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