Applied Math Seminar
Monday, November 8, 1999, 4:00pm, 120 Physics
Will Wilson (Duke University, Dept. of Zoology)
Consuming, Grouping and Coexisting: Resource-Mediated Aggregation
Abstract:- A general consumer--resource model assuming discrete consumers and a
continuously structured resource is examined. We study two foraging
behaviors, which lead to fixed and flexible patch residence times,
in conjunction with a simple consumer energetics model linking resource
consumption, foraging behavior, and metabolic costs. Results indicate a
single evolutionarily stable foraging strategy for fixed and flexible
foraging in a nonspatial environment, but flexible foraging in a spatial
environment leads to consumer grouping, which affects the resource
distribution such that no single foraging strategy can exclude all
other strategies. This evolutionarily stable coexistence of multiple
foraging strategies may help explain a dichotomous pattern observed
in a wide variety of natural systems.
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