Abstract The management of fisheries requires well-planned approaches that consider the socio-ecological costs and benefits of management options while minimising conflicts among fishing practices. We developed a framework to anticipate the cost-effectiveness of several fisheries management options, including space-time closures, gear selectivity improvements, and fishing effort reduction of eastern Ionian Sea fisheries. We also examined to what extent these fisheries could be influenced by placing new aquaculture sites into specific areas. We used a dynamic space-time model considering the effect of possible fishing effort displacement on alternative marine areas. A fine-scale distribution of 6 species of high commercial importance, for the eastern Ionian fisheries (central Mediterranean), was used together with the fishing effort distribution of trawlers, purse-seines, and small-scale fisheries to track the implications on several bio-economic indicators. The study revealed that the stocks and the fisheries economics benefited from a 10% reduction in fishing effort for all fishery sectors, while the unwanted fish catch was slightly higher. Thus, although there are notable advantages, this management option is not sufficient to support an EU regulatory framework aiming to promote more selective fishing practices and mitigate unwanted catches. However, we showed that the protection of juveniles, by imposing selectivity improvements or space-time closures on trawlers, slightly reduced the unwanted catch. Nevertheless, the benefit for the majority of stocks and fisheries economics, during the five-year simulation period, was limited. In the case of space-time closures, this is attributed to the offset due to the fishing effort displacement towards other areas. While the benefit on fish populations by improving trawl selectivity, it depends on the species. Finally, the establishment of new aquaculture units could lead to a slight re-allocation of fishing effort along the border of the new sites without substantially affecting the profit of small-scale fisheries. Such findings are useful for fisheries management and broader spatial planning in the Ionian Sea. They will provide insight to policymakers and different fishing sectors, thus enabling a more transparent and participatory decision–making process.

中文翻译：

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爱奥尼亚海东部渔业空间规划和努力转移：生物经济模型

摘要 渔业管理需要精心策划的方法，既要考虑管理选择的社会生态成本和收益，同时最大限度地减少捕捞实践之间的冲突。我们开发了一个框架来预测几种渔业管理方案的成本效益，包括时空关闭、渔具选择性改进和爱奥尼亚海东部渔业的捕捞努力减少。我们还研究了将新的水产养殖场置于特定区域会在多大程度上影响这些渔业。我们使用了一个动态时空模型，考虑到可能的捕捞努力量位移对替代海洋区域的影响。对爱奥尼亚东部渔业（地中海中部）具有高度商业重要性的 6 个物种的精细分布，与拖网渔船、围网和小规模渔业的捕捞努力量分布一起使用，以跟踪对若干生物经济指标的影响。研究表明，所有渔业部门的捕捞努力量减少 10%，使种群和渔业经济受益，而多余的鱼获量略高。因此，尽管有显着的优势，但这种管理选项不足以支持旨在促进更有选择性的捕捞方法和减少不必要的捕获量的欧盟监管框架。然而，我们表明，通过对拖网渔船实施选择性改进或时空封闭，保护幼鱼会略微减少不必要的渔获量。然而，在五年模拟期间，大多数种群和渔业经济的收益是有限的。在时空关闭的情况下，这是由于捕捞努力移向其他区域造成的偏移。虽然通过提高拖网选择性对鱼类种群的益处取决于物种。最后，新水产养殖单位的建立可能会导致沿新地点边界的捕捞努力量略有重新分配，而不会显着影响小规模渔业的利润。这些发现对爱奥尼亚海的渔业管理和更广泛的空间规划很有用。它们将为决策者和不同的渔业部门提供洞察力，从而使决策过程更加透明和参与。虽然通过提高拖网选择性对鱼类种群的益处取决于物种。最后，新水产养殖单位的建立可能会导致沿新地点边界的捕捞努力量略有重新分配，而不会显着影响小规模渔业的利润。这些发现对爱奥尼亚海的渔业管理和更广泛的空间规划很有用。它们将为决策者和不同的渔业部门提供洞察力，从而使决策过程更加透明和参与。虽然通过提高拖网选择性对鱼类种群的益处取决于物种。最后，新水产养殖单位的建立可能会导致沿新地点边界的捕捞努力量略有重新分配，而不会显着影响小规模渔业的利润。这些发现对爱奥尼亚海的渔业管理和更广泛的空间规划很有用。它们将为决策者和不同的渔业部门提供洞察力，从而使决策过程更加透明和参与。这些发现对爱奥尼亚海的渔业管理和更广泛的空间规划很有用。它们将为决策者和不同的渔业部门提供洞察力，从而使决策过程更加透明和参与。这些发现对爱奥尼亚海的渔业管理和更广泛的空间规划很有用。它们将为决策者和不同的渔业部门提供洞察力，从而使决策过程更加透明和参与。