Prey Behavior and Predator-Prey Coexistence in a Patchy Environment

捕食者-被捕食者理论表明， 斑块环境中的捕食者-被捕食者共存包括：1） 捕食者斑块中的捕食率; 2）猎物适合度 没有捕食者的斑块;和3）之间的运动模式 补丁. 拟议的研究将研究影响 小口蝾螈幼虫与掠食性 太阳鱼在两个空间尺度：在溪流池和溪流 由一系列的水池组成，其中一些没有鱼。 的 拟议的工作包括3个组成部分：A）实地调查， 估计幼鱼在有鱼和无鱼池塘中的存活率， 幼虫在水池中的移动; B）关于 幼虫在鱼类中的生存和扩散行为， 无鱼池;和C）现场实验的生存， 鱼塘 令人惊讶的是，很少有实证研究考察了 在病态环境中捕食者与被捕食者共存的行为。 这项研究将包括：1）详细数据的影响， 影响共存的三个因素（列出 2）行为相关性的评估， 对共存模式产生重要的间接影响。

Predator-prey theory suggests that key factors determining predator-prey coexistence in a patchy environment include: 1) predation rates in patches with predators; 2) prey fitness in patches without predators; and 3) patterns of movement among patches. The proposed research will examine factors that influence the coexistence of small-mouthed salamander larvae with predatory sunfish at two spatial scales: in stream pools and in streams consisting of a series of pools, some of which lack fish. The proposed work includes 3 components: A) field surveys to estimate larval survivorship in fish and fishless pools, and larval movement among pools; B) field studies on the effects of larval behaviors on survivorship and dispersal among fish and fishless pools; and C) field experiments on the survivorship in fish pools. Surprisingly few empirical studies have examined the effects of behavior on predator-prey coexistence in a pathcy environment. This study will include: 1) detailed data on the effects of behavior on the three factors affecting coexistence (listed above); and 2) assessments of behavioral correlations that can produce important indirect effects on coexistence patterns.