Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1086/375298
Title (Primary) Foray search: an effective systematic dispersal strategy in fragmented landscapes
Author Conradt, L.; Zollner, P.A.; Roper, T.J.; Frank, K. ORCID logo ; Thomas, C.D.
Source Titel American Naturalist
Year 2003
Department OESA
Volume 161
Issue 6
Page From 905
Page To 915
Language englisch

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.

Persistent UFZ Identifier
Conradt, L., Zollner, P.A., Roper, T.J., Frank, K., Thomas, C.D. (2003):
Foray search: an effective systematic dispersal strategy in fragmented landscapes
Am. Nat. 161 (6), 905 - 915 10.1086/375298