Abstract

This work seeks to demonstrate how light pollution impacts fishing activities, including catch rates and the profits of fishermen. Our goal is to examine how light pollution affects the fishing dynamics of sardines and anchovies in the Casablanca-Rabat region of Morocco, within a bioeconomic framework involving these two marine populations. In this article, we show that our model is well posed by studying the positivity and the boundedness of our system, and then we show the local stability of the interior equilibrium point. Then, we move on to calculating the fishing effort that maximizes fishermen’s profits and catches under two main constraints: The influence of light pollution on the sustained viability of the sardine and anchovy populations. Using data reported by the National Fisheries Research Institute (INRH), we obtain detailed results in numerical simulations.

中文翻译：

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研究光污染对渔业生物经济动态的影响

摘要

这项工作旨在展示光污染如何影响渔业活动，包括捕获率和渔民的利润。我们的目标是在涉及摩洛哥卡萨布兰卡-拉巴特地区沙丁鱼和凤尾鱼的生物经济框架内，研究光污染如何影响这两个海洋种群的捕捞动态。在本文中，我们通过研究系统的正性和有界性来证明我们的模型是适定的，然后我们展示了内部平衡点的局部稳定性。然后，我们继续计算在两个主要约束下使渔民利润和渔获量最大化的捕捞努力量： 光污染对沙丁鱼和凤尾鱼种群持续生存的影响。使用国家渔业研究所 (INRH) 报告的数据，我们获得了数值模拟的详细结果。