Assessing the welfare impacts of changes in recreational fisheries management: A modelling approach for European sea bass
Assessing the welfare impacts of changes in recreational fisheries management: A modelling approach for European sea bass
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评估休闲渔业管理变化对福利的影响：欧洲鲈鱼建模方法
DOI：
10.1016/j.marpol.2022.105408
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发表时间：
2023
期刊：
影响因子：
3.8
通讯作者：
Cevenini F
中科院分区：
文献类型：
--
作者：
Cevenini F
对渔业政策的影响进行经济评估是许多全球渔业的一项法律的要求，对有效的政策制定至关重要。可归因于政策的成本和收益的某些变化可以通过对市场的影响来评估，而其他变化则比较困难，因为市场可能不存在。需要进行分析，以评估不同管理制度下渔业产生的价值。欧洲海鲈鱼（Dicentrarchus labrax）的北方存量在过去十年中迅速下降，导致商业和娱乐部门的管理。对休闲渔民实行了袋数限制、禁渔期和最小尺寸，但管理措施的社会影响尚未量化。在这里，我们使用海鲈鱼演示一种方法来评估管理措施对休闲渔民福利的影响。通过结合股票评估，个人渔获量数据，并估计福利从最近的选择实验，福利的差异下的一系列监管方案进行了比较。对2014年至2020年期间实施的基于管理的九个设想方案进行了测试。最高的福利估计被发现与最低水平的限制和最低的估计为一个没有采取渔业，这是由保留的鱼具有较高的价值比释放的鱼。在这两个极端之间，娱乐部门产生的估计福利相差2203万英镑，其余情景在这些数值之间。我们的研究结果强调了政策制定者需要仔细考虑保护鱼类种群和休闲渔民福利的管理方案。
Economic appraisal of the impacts of fisheries policies is a legal requirement in many global fisheries and is crucial for effective policy making. Some changes in costs and benefits attributable to policy can be assessed through impacts on markets, whilst others are more difficult, as markets may not exist. Analysis is needed to assess value generated by fisheries under different management regimes. The northern stock of European sea bass (Dicentrarchus labrax) has declined rapidly over the past decade leading to management of both the commercial and recreational sectors. Bag limits, closed seasons, and minimum sizes were introduced for recreational fishers, but the social impact of management measures has not been quantified. Here, we use sea bass to demonstrate a method for assessing the impact of management measures on recreational fisher welfare. Through combining stock assessments, individual catch data, and estimates of welfare from a recent choice experiment, differences in welfare under a range of regulatory scenarios were compared. Nine scenarios based on management implemented between 2014 and 2020 were tested. Highest welfare estimates were found with the lowest levels of restrictions and lowest estimates for a no-take fishery, which was driven by retained fish having a higher value than released fish. There was a difference of £ 22.03 million in estimated welfare generated by the recreational sector between these extremes, with the remaining scenarios amid those values. Our results highlight the need for policy makers to carefully consider management options that protect both fish stocks and the welfare of recreational fishers.
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