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Foray search: An effective systematic dispersal strategy in fragmented landscapes

Conradt, L, Zollner, P A, Roper, T J, Frank, K and Thomas, C D (2003) Foray search: An effective systematic dispersal strategy in fragmented landscapes. The American Naturalist. pp. 905-915. ISSN 0003-0147

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Abstract

In the absence of evidence to the contrary, population models generally assume that the dispersal trajectories of animals are random, but systematic dispersal could be more efficient at detecting new habitat and may therefore constitute a more realistic assumption. Here, we investigate, by means of simulations, the properties of a potentially widespread systematic dispersal strategy termed "foray search." Foray search was more efficient in detecting suitable habitat than was random dispersal in most landscapes and was less subject to energetic constraints. However, it also resulted in considerably shorter net dispersed distances and higher mortality per net dispersed distance than did random dispersal, and it would therefore be likely to lead to lower dispersal rates toward the margins of population networks. Consequently, the use of foray search by dispersers could crucially affect the extinction-colonization balance of metapopulations and the evolution of dispersal rates. We conclude that population models need to take the dispersal trajectories of individuals into account in order to make reliable predictions.

Item Type: Article
Copyright, Publisher and Additional Information: © 2003 by The University of Chicago. Added in accordance with the publisher's self-archiving policy.
Keywords: colonization dynamics, dispersal behavior, dispersal patterns, habitat fragmentation, metapopulation ecology, METAPOPULATION DYNAMICS, POPULATION-DYNAMICS, BEHAVIOR, ECOLOGY, CONSEQUENCES, INDIVIDUALS, MIGRATION, SQUIRRELS, MOVEMENTS, LARVAE
Institution: The University of York
Academic Units: The University of York > Biology (York)
Depositing User: Repository Officer
Date Deposited: 15 Jun 2006
Last Modified: 16 Oct 2014 17:20
Status: Published
Refereed: Yes
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/1293

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