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T-Space at The University of Toronto Libraries >
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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/17168

Title: Modelling Intraguild Predation with Adaptive Behaviour
Authors: Fung, Simon Ronald
Advisor: Abrams, Peter
Department: Ecology and Evolutionary Biology
Keywords: Omnivory
Intraguild Predation
Adaptive Behaviour
Model
Issue Date: 24-Feb-2009
Abstract: The thesis examines the dynamics of intraguild predation models incorporating adaptive behaviour. The top predator varies its relative consumption of the intermediate consumer and the basal resource. The consumer alters its activity level in response to the threat of predation. Incorporating these adaptive behaviours facilitated three species coexistence, but restricted omnivory by promoting the formation of three species food chains. Model modifications which promoted omnivory also tended to reduce three species coexistence. It is predicted that omnivory should be most common when the intermediate and the basal species are similarly profitable to the predator. The model also predicts two types of omnivory. Strong omnivory occurs when the predator always consumes intermediate amounts of both prey items. Weak omnivory occurs when the predator preys almost exclusively on one prey at most times, but rapidly switches to include the other when the relative abundance of that second prey exceeds a certain level.
URI: http://hdl.handle.net/1807/17168
Appears in Collections:Master
Department of Ecology & Evolutionary Biology - Master theses

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