Abstract
Understanding the ecological factors that affect dispersal distances allows us to predict the consequences of dispersal. Although predator avoidance is an important cause of prey dispersal, its effects on dispersal distance have not been investigated. We used simple experimental setups to test dispersal distances of the ambulatory dispersing spider mite (Tetranychus kanzawai) in the presence or absence of a predator (Neoseiulus womersleyi). In the absence of predators, most spider mites settled in adjacent patches, whereas the majority of those dispersing in the presence of predators passed through adjacent patches and settled in distant ones. This is the first study to experimentally demonstrate that predators induce greater dispersal distance in prey.
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We thank three anonymous reviewers for thoughtful suggestions, and members of the Laboratory of Ecological Information for valuable suggestions and encouragement.
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Communicated by: Sven Thatje
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Otsuki, H., Yano, S. Predation risk increases dispersal distance in prey. Naturwissenschaften 101, 513–516 (2014). https://doi.org/10.1007/s00114-014-1181-3
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DOI: https://doi.org/10.1007/s00114-014-1181-3