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The Spatial Dynamics of Predators and the Benefits and Costs of Sharing Information

机译:捕食者的空间动态与信息共享的收益与成本。

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摘要

Predators of all kinds, be they lions hunting in the Serengeti or fishermen searching for their catch, display various collective strategies. A common strategy is to share information about the location of prey. However, depending on the spatial characteristics and mobility of predators and prey, information sharing can either improve or hinder individual success. Here, our goal is to investigate the interacting effects of space and information sharing on predation efficiency, represented by the expected rate at which prey are found and consumed. We derive a feeding functional response that accounts for both spatio-temporal heterogeneity and communication, and validate this mathematical analysis with a computational agent-based model. This agent-based model has an explicit yet minimal representation of space, as well as information sharing about the location of prey. The analytical model simplifies predator behavior into a few discrete states and one essential trade-off, between the individual benefit of acquiring information and the cost of creating spatial and temporal correlation between predators. Despite the absence of an explicit spatial dimension in these equations, they quantitatively predict the predator consumption rates measured in the agent-based simulations across the explored parameter space. Together, the mathematical analysis and agent-based simulations identify the conditions for when there is a benefit to sharing information, and also when there is a cost.
机译:各种各样的捕食者,无论是在塞伦盖蒂(Serengeti)狩猎的狮子还是寻找其捕获物的渔民,都展现出各种集体策略。一种常见的策略是共享有关猎物位置的信息。但是,取决于掠食者和猎物的空间特征和移动性,信息共享会改善或阻碍个人成功。在这里,我们的目标是研究空间和信息共享对捕食效率的相互作用影响,用发现和消耗猎物的预期速率来表示。我们推导了同时时空异质性和沟通的馈送功能响应,并使用基于计算代理的模型验证了此数学分析。这种基于代理的模型具有明确但最小的空间表示,以及有关猎物位置的信息共享。该分析模型将捕食者的行为简化为几个离散状态,并且在获取信息的个人利益与在捕食者之间建立时空相关性的成本之间进行必要的权衡。尽管这些方程式中没有明确的空间维度,但他们定量地预测了在探索的参数空间中基于代理的模拟中测得的捕食者消耗率。数学分析和基于代理的模拟共同确定了共享信息的好处和成本的条件。

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