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Dynamics of a stochastic regime-switching predator-prey model with harvesting and distributed delays

机译:收获和分布延迟随机状态切换捕食者猎物模型的动态

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In this paper, we use a Markovian switching process to model the telephone noise in the environment, and propose a stochastic regime-switching predator-prey model with harvesting and distributed delays. We first establish the sufficient and necessary conditions for the extinction and the existence of a unique ergodic invariant measure of the model. These criteria can be used to justify whether the populations die out or not when they will die out in some subsystems and will be persistent in others. Then we obtain the sufficient and necessary conditions for the existence of an optimal harvesting policy, and give the explicit forms of the optimal harvesting effort and the maximum of sustainable yield. The impacts of the telephone noise on the persistence, extinction and optimal harvesting policy of the model are revealed. Some recent results on predator-prey models without telephone noise are also improved. (C) 2017 Elsevier Ltd. All rights reserved.
机译:在本文中,我们使用Markovian切换过程来模拟环境中的电话噪声,并提出了一种随机状态切换捕食者 - 猎物模型,其收获和分布延迟。 我们首先为灭绝的灭绝和必要的条件制定了足够的和必要条件,并存在模型的独特ergodic不变度量。 这些标准可用于证明这些人群是否会在某些子系统中消亡时,并将持久地死亡。 然后,我们获得了存在最佳收获政策的充分和必要条件,并提供最佳收获努力的明确形式,最大可持续产量。 揭示了电话噪声对模型的持久性,灭绝和最佳收获政策的影响。 在没有电话噪声的捕食者 - 猎物型号的一些结果也得到了改善。 (c)2017 Elsevier Ltd.保留所有权利。

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