论文标题
捕食者捕集系统中收获的生物经济分析：切萨皮克湾渔业中的案例研究
Bioeconomic analysis of harvesting within a predator-prey system: A case study in the Chesapeake Bay fisheries
论文作者
论文摘要
生物资源的可持续使用非常重要，因为从长远来看，过度剥削可能导致库存枯竭，这反过来又可能威胁到生物多样性。切萨皮克湾是一个极其复杂的生态系统，其渔业的可持续收获对于生态系统的生物多样性和该地区的经济繁荣至关重要。在这里，我们使用基于生态系统的数学模型来研究种群动态，通过收获切萨皮克湾的两种关键鱼类，大西洋Menhaden（Brevoortia tyrannus）作为猎物，将其作为捕食者。我们首先将广义的Lotka-Volterra模型拟合到从海湾渔业获得的两个物种的实际时间序列数据中。我们得出了存在生物经济平衡并研究生物系统的稳定性和弹性的条件。我们研究了最大的可持续产量，最大经济产量和弹性最大化的收益率政策及其对渔业的影响长期可持续性，尤其是在Menhaden-Bass人口动态方面。政策制定者可以使用这项研究来平衡经济和生态收获目标，同时管理切萨皮克湾渔业中大西洋梅哈登和条纹鲈鱼的人口。
Sustainable use of biological resources is very important as over exploitation on the long run may lead to stock depletion, which in turn may threaten biodiversity. The Chesapeake Bay is an extremely complex ecosystem, and sustainable harvesting of its fisheries is essential both for the ecosystem's biodiversity and economic prosperity of the area. Here, we use ecosystem based mathematical modeling to study the population dynamics with harvesting of two key fishes in the Chesapeake Bay, the Atlantic Menhaden (Brevoortia tyrannus) as a prey and the Striped Bass (Morone saxatilis) as a predator. We start by fitting the generalized Lotka-Volterra model to actual time series abundance data of the two species obtained from fisheries in the Bay. We derive conditions for the existence of the bio-economic equilibrium and investigate the stability and the resilience of the biological system. We study the maximum sustainable yield, maximum economic yield, and resilience maximizing yield policies and their effects on the fisheries long term sustainability, particularly with respect to the menhaden-bass population dynamics. This study may be used by policy-makers to balance the economic and ecological harvesting goals while managing the populations of Atlantic menhaden and striped bass in the Chesapeake Bay fisheries.
