In food webs, fishery can play the role of top predator, competing thus with other top predators for valuable food resources. In this view, it has been claimed in fisheries management that culling of top predators can be a means to improve fishery yield. To investigate this hypothesis, we use theoretical population models to assess in a multispecies context how fishery yield from target species harvest responds to top predator cull. Defying crisp summary, the four analysed food web models show that this response may be either positive or negative or both, indicating that in terms of multispecies fishery management the harvest yield may not accrue as a consequence of predator removal. In addition, this multitude of behaviours points also to the fact that the response of fishery yield to top predator cull may be difficult to assess.

中文翻译：

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在多物种渔业背景下，渔业产量与顶级捕食者淘汰之间的相互作用。

在食物网中，渔业可以发挥顶级捕食者的作用，从而与其他顶级捕食者竞争宝贵的粮食资源。根据这种观点，在渔业管理中声称，淘汰顶级捕食者可以成为提高渔业产量的一种手段。为了研究这个假设，我们使用理论种群模型在多物种环境中评估目标物种收获的渔业产量如何对顶级捕食者的死皮做出反应。缺乏清晰的总结，这四个分析的食物网络模型表明，这种反应可能是正面的或负面的，或两者都有，表明就多物种渔业管理而言，捕食者的去除可能不会增加收获量。此外，这种多种行为还表明，可能难以评估渔业产量对顶级捕食者剔除的反应。