PATCH CHOICE UNDER PERCEPTUAL CONSTRAINTS - A CAUSE FOR DEPARTURES FROM AN IDEAL FREE DISTRIBUTION
PATCH CHOICE UNDER PERCEPTUAL CONSTRAINTS - A CAUSE FOR DEPARTURES FROM AN IDEAL FREE DISTRIBUTION
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DOI：
10.1007/bf00300543
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发表时间：
1986-01-01
影响因子：
2.3
通讯作者：
ABRAHAMS, MV
中科院分区：
文献类型：
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作者：
ABRAHAMS, MV
回顾理想自由分布(IFD)理论的测试发现了一种特征偏差：资源比例较小的补丁相对过度使用，而资源比例较大的补丁相对未充分使用。开发了一个模型来研究感知斑块质量差异的能力有限的动物如何影响觅食者的IFD。该约束会产生观察到的偏移，这种偏移会随着面片数量的增加而被夸大。萨瑟兰(1983)发展了一个基于干涉的模型，该模型也可以解释观察到的偏差。这两个模型的区别在于，只有感知极限模型(本文)对总体资源可获得性的绝对变化和动物数量的增加敏感。此外，萨瑟兰的S模型预测，当偏离IFD时，摄入量不会有差异，而感知极限模型预测，摄入量应该在不同的斑块之间有所不同。
A review of tests of ideal free distribution (IFD) theory reveals a characteristic bias: patches with a small proportion of the resources are relatively overused and patches with a larger proportion of the resources are relatively under-used. A model is developed to examine how animals with limited abilities to perceive differences in patch quality affect an IFD by foragers. This constraint produces the observed bias, a bias that is exaggerated as the number of patches increases. Sutherland (1983) has developed a model based on interference which can also explain the observed bias. The two models can be differentiated in that only the perception limit model (this paper) is sensitive to absolute changes in overall resource availability and to increases in the number of animals. Additionally, Sutherland''s model predicts that when deviations away from an IFD occur there will be no differences in intake rates, while the perception limit model predicts that intake rates should vary between patches.