Mixed encounters, limited perception and optimal foraging
Mixed encounters, limited perception and optimal foraging
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混合遭遇、有限感知和最佳觅食
DOI：
10.1006/bulm.2000.0179
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发表时间：
2000
影响因子：
3.5
通讯作者：
L. Berec
中科院分区：
文献类型：
--
作者：
L. Berec
本文演示了如何感知的限制捕食者和捕食者遇到猎物的可能性，依次（一个猎物类型的时间）和同时（两个或两个以上的猎物类型的时间）可能会影响捕食者的攻击决策，饮食组成和功能反应的行为捕食者-猎物系统。捕食者物种的个人被假定为饲料最佳的两种猎物类型，并有确切的知识猎物的人口数量（或密度），只有在附近的实际空间位置。系统特性的检查通过离散时间，离散空间，基于个体的一个捕食者两个食饵相互作用的模型。模型预测相比，已通过假设只有顺序遇到的捕食者与猎物和/或无所不知的捕食者知道猎物在整个环境中的人口密度。结果表明，零-一猎物选择规则，最佳的连续遭遇和全知的捕食者，突然改变部分偏好的情况下，全知的捕食者面临的两种类型的猎物遭遇的猎物类型。后者，反过来，成为逐渐变化的部分偏好时，捕食者全知被认为是唯一的地方。
This article demonstrates how perceptual constraints of predators and the possibility that predators encounter prey both sequentially (one prey type at a time) and simultaneously (two or more prey types at a time) may influence the predator attack decisions, diet composition and functional response of a behavioural predator-prey system. Individuals of a predator species are assumed to forage optimally on two prey types and to have exact knowledge of prey population numbers (or densities) only in a neighbourhood of their actual spatial location. The system characteristics are inspected by means of a discrete-time, discrete-space, individual-based model of the one-predator-two-prey interaction. Model predictions are compared with ones that have been obtained by assuming only sequential encounters of predators with prey and/or omniscient predators aware of prey population densities in the whole environment. It is shown that the zero-one prey choice rule, optimal for sequential encounters and omniscient predators, shifts to abruptly changing partial preferences for both prey types in the case of omniscient predators faced with both types of prey encounters. The latter, in turn, become gradually changing partial preferences when predator omniscience is considered only local.