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Estimating predator functional responses using the times between prey captures
Ecology ( IF 4.8 ) Pub Date : 2021-02-15 , DOI: 10.1002/ecy.3307
Kyle E. Coblentz 1 , John P. DeLong 1
Affiliation  

Predator functional responses describe predator feeding rates and are central to predator–prey theory. Ecologists have measured thousands of predator functional responses using the same basic experimental method. However, this design is ill‐suited to address many current questions regarding functional responses. We derive a new experimental design and statistical analysis that quantifies functional responses using the times between a predators’ feeding events requiring only one or a few trials. We examine the feasibility of the experimental method and analysis using simulations to assess the ability of the statistical model to estimate functional response parameters and perform a proof‐of‐concept experiment estimating the functional responses of two individual jumping spiders. Our simulations show that the statistical method reliably estimates functional response parameters. Our proof‐of‐concept experiment illustrates that the method provides reasonable estimates of functional response parameters. By virtue of the fewer number of trials required to measure a functional response, the method derived here promises to expand the questions that can be addressed using functional response experiments and the systems in which they can be measured. Thus, we hope that our method will refine our understanding of functional responses and predator–prey interactions more generally.

中文翻译:

利用捕获猎物之间的时间来估计捕食者的功能响应

捕食者的功能反应描述了捕食者的进食速度,是捕食者-猎物理论的中心。生态学家已经使用相同的基本实验方法测量了数千种捕食者的功能性反应。但是,这种设计不适合解决当前有关功能响应的许多问题。我们得出了一个新的实验设计和统计分析,该函数使用捕食者之间的摄食事件之间的时间来量化功能响应,而只需要进行一次或几次试验即可。我们检查了实验方法和使用模拟进行分析的可行性,以评估统计模型估计功能响应参数的能力,并进行概念验证实验来估计两个单独的跳跃蜘蛛的功能响应。我们的仿真表明,统计方法可以可靠地估计功能响应参数。我们的概念验证实验表明,该方法提供了功能响应参数的合理估计。由于测量功能响应所需的试验次数较少,因此,此处导出的方法有望扩展使用功能响应实验和可测量其功能的系统可以解决的问题。因此,我们希望我们的方法可以更广泛地完善我们对功能反应和食肉动物与猎物之间相互作用的理解。这里导出的方法有望扩展使用功能响应实验和可以测量它们的系统可以解决的问题。因此,我们希望我们的方法可以更广泛地完善我们对功能反应和食肉动物与猎物之间相互作用的理解。这里导出的方法有望扩展使用功能响应实验和可以测量它们的系统可以解决的问题。因此,我们希望我们的方法可以更广泛地完善我们对功能反应和食肉动物与猎物之间相互作用的理解。
更新日期:2021-04-01
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