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Evolutionary Ecology Research, 2001, 3: 805827 2001 Frederick R. Adler

Summary: Evolutionary Ecology Research, 2001, 3: 805­827
© 2001 Frederick R. Adler
Patterns of patch rejection in size-structured
populations: beyond the ideal free distribution
and size segregation
Frederick R. Adler,1
* Shane A. Richards2
and André M. de Roos2
Department of Mathematics and Department of Biology, University of Utah, 155 South 1400 East,
Salt Lake City, UT 84112­0900, USA and 2
Section of Population Biology, University of Amsterdam,
Kruislaan 320, 1098 SM Amsterdam, Netherlands
We examine optimal patch allocation strategies in a population structured by size or some other
characteristic. By treating size-specific differences among patches as limiting factors, we create a
single framework to analyse foraging for two resources, foraging in the presence of predators
and foraging in the presence of competition. The ideal free distribution or size segregation are
optimal only in restricted circumstances, among a range of other intermediate patterns of patch
rejection. The predicted pattern can shift from an ideal free distribution to various forms of size


Source: Adler, Fred - Department of Mathematics, University of Utah


Collections: Environmental Sciences and Ecology