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Type: Journal article
Title: The effect of resource aggregation at different scales: Optimal foraging behavior of Cotesia rubecula
Author: Tenhumberg, B.
Keller, M.
Tyre, R.
Possingham, H.
Citation: The American Naturalist, 2001; 158(5):505-518
Publisher: Univ Chicago Press
Issue Date: 2001
ISSN: 0003-0147
Statement of
Brigitte Tenhumberg, Michael A Keller, Andrew J Tyre and Hugh P Possingham
Abstract: Resources can be aggregated both within and between patches. In this article, we examine how aggregation at these different scales influences the behavior and performance of foragers. We developed an optimal foraging model of the foraging behavior of the parasitoid wasp Cotesia rubecula parasitizing the larvae of the cabbage butterfly Pieris rapae. The optimal behavior was found using stochastic dynamic programming. The most interesting and novel result is that the effect of resource aggregation within and between patches depends on the degree of aggregation both within and between patches as well as on the local host density in the occupied patch, but lifetime reproductive success depends only on aggregation within patches. Our findings have profound implications for the way in which we measure heterogeneity at different scales and model the response of organisms to spatial heterogeneity.
Keywords: resource aggregation
optimal foraging behavior
Cotesia rubecula
stochastic dynamic programming
spatial scale
Description: Copyright is owned by publisher:
DOI: 10.1086/323131
Published version:;2-U
Appears in Collections:Agriculture, Food and Wine publications
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