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Spatial Harvest Regimes for a Sedentary Fishery

机译：久坐渔业的空间收获制度

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This paper investigates the role of harvest sanctuaries and reserves in the management of a sedentary fishery. An optimal control bioeconomic model is developed and optimized for native oysters in the Chesapeake Bay, US, that incorporates two positive externalities generated by oyster stocks: nutrient removal and provision of habitat for other benthic species. The model incorporates four management regimes that currently exist in the Bay: public grounds that are continuously harvested, aquaculture on leased grounds, sanctuaries that are never harvested, and reserves that are periodically pulse harvested. We find that if harvest effort in public grounds can be controlled, then that management regime unambiguously provides the highest social welfare. However, if harvest effort in public grounds cannot be controlled, then reserves provide the highest social welfare. Sanctuaries are part of the optimal mix of regimes only when harvest effort on public grounds cannot be controlled and a pulsed harvest is not feasible.
机译：本文研究了收成避难所和保护区在久坐渔业管理中的作用。针对美国切萨皮克湾的本地牡蛎，开发并优化了最佳控制生物经济模型，该模型结合了牡蛎种群产生的两个积极外部效应：营养去除和为其他底栖生物提供栖息地。该模型结合了海湾目前存在的四种管理制度：连续收获的公共场所，租赁土地上的水产养殖，从未收获的保护区以及定期进行脉冲收获的保护区。我们发现，如果可以控制公共场所的采伐努力，那么管理制度无疑会提供最高的社会福利。但是，如果无法控制公共场所的采伐努力，那么储备将提供最高的社会福利。只有当无法控制在公共场所的采伐努力并且不可行进行脉冲采伐时，庇护所才是制度最佳组合的一部分。

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