Predator-prey responses in an acarine system
Predator-prey responses in an acarine system
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螨系统中的捕食者-猎物反应
DOI：
10.1007/bf02530853
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
M. Hassell
中科院分区：
文献类型：
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作者：
M. H. J. P. Pernando;M. Hassell
本研究考察了掠食性螨对其猎物荨叶螨的密度和分布的反应。它分为三个部分。首先，展示了原雌、双雌和成年雌对不同猎物阶段的功能反应。绝大多数响应都是II型形式，并且讨论了攻击率和处理时间值的变化。然后描述了实验，在实验中，单个原幼鱼、双幼鱼和成年雌性捕食者呈现不同比例的两种猎物年龄类别（卵和双幼鱼，幼虫和双幼鱼）。在单独的功能反应实验的基础上，讨论了对某一捕食阶段的任何观察到的偏好与预测偏好的关系。最后，研究了不同密度的成年雌捕食者对双虹蝇在豆叶上非随机分布的反应。捕食者明显倾向于聚集在猎物密度高的小叶上，这在一定程度上抵消了干扰，增加了分散到其他小叶上的可能性。
This study examines the responses of the predatory mite,Phytoseiulus persimilis, to the density and distribution of its prey,Tetranychus urticae. It is divided into three parts. Firstly, the functional responses of protonymph, deutonymph and adult females towards different prey stages are displayed. The great majority of the responses are of the type II form, and the variations in the values of attack ratea′ and handling timeThare discussed. Experiments are then described in which individual protonymph, deutonymph and adult female predators are presented with varying ratios of two prey age‐classes (eggs and deutonymphs, and larvae and deutonymphs). Any observed preference for one of the prey stages is discussed in relation to the predicted preference on the basis of the separate functional response experiments. Finally, the response of different densities of adult female predators to a non‐random distribution of deutonymph prey on bean leaflets is examined. The predators show a clear tendency to aggregate on the leaflets of high prey density, counteracted to some extent by interference increasing the probability of dispersal to other leaflets.