Predation risk increases dispersal distance in prey
Predation risk increases dispersal distance in prey
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DOI：
10.1007/s00114-014-1181-3
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发表时间：
2014-06-01
影响因子：
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通讯作者：
Yano, Shuichi
中科院分区：
文献类型：
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作者：
Otsuki, Hatsune;Yano, Shuichi
了解影响扩散距离的生态因素使我们能够预测扩散的后果。尽管捕食者回避是猎物扩散的一个重要原因，但其对扩散距离的影响尚未得到研究。我们使用简单的实验装置来测试分散距离的走动分散的蜘蛛螨（叶螨kanzawai）在存在或不存在的捕食者（新小绥螨womersleyi）。在没有捕食者的情况下，大多数蜘蛛螨定居在相邻的补丁，而大多数分散在捕食者的存在下，通过相邻的补丁，并解决在遥远的。这是第一个研究实验证明，捕食者诱导更大的扩散距离猎物。
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.