Lecture32_Consumption

Lecture32_Consumption - Consumption I. Predation A. How...

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Consumption I. Predation A. How does predation affect prey populations? 1. Do predators reduce prey populations below the level that can be supported by available resources? Test: Predator removal experiments Kaibab plateau: removal of wolves, cougars, coyotes Start: Predict: Results: Conclusion? In at least some populations, 2. How do prey respond to predators? a. Standing defenses = always present • warning coloration: • camouflage: • deceptive coloration: • fighting: • chemicals: b. Inducible defenses = produced in response to predation e.g. Blue crabs (predators) and mussels (prey) • The habitat:
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• Predict: average average shell attachment thick- strength ness low high low high flow flow flow flow Why does this correlation exist? What is the problem with correlational data? H 1 : Increases in shell thickness and attachment strength are induced by evidence of predation nearby. What is inducing the inducible defense?
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Lecture32_Consumption - Consumption I. Predation A. How...

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