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首页> 外文期刊>Oceanographic Literature Review >Marine reserve more sustainable than gear restriction in maintaining long-term coral reef fisheries yields
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Marine reserve more sustainable than gear restriction in maintaining long-term coral reef fisheries yields

机译：海洋保护储备比在维护长期珊瑚礁渔业收益率方面更具可持续性

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The long-term consequences of managing overfished fisheries through either gear restrictions or closures are among the many dilemmas facing small-scale fisheries managers. To evaluate long-term outcomes, fishing effort and catch were measured from 1995 to 2019 in two districts in Kenya, one that established a marine reserve in 1991 and another that eliminated destructive small-meshed drag nets beginning in 2001. Stock biomass in the 12 studied landing sites were below multispecies maximum sustainable yield (MMSY) and effort declined in all sites, indicating overfishing. Both interventions showed positive responses in catch per unit effort (CPUE) trends that indicated successful management but the changes were more sustained in the closure-adjacent than the gear-restricted landing sites. For example, total per-area yields in the gear-restricted sites declined steadily to an equilibrium that was 30% below the predicted MMSY. In contrast, and despite the low stock levels, closure-adjacent landing sites maintained yields near MMSY over the full time series. This is likely due to an increase in fish recovery rates by ～42% from an r of 0.23 to an r of 0.34 in the presence of a closure. The study suggests that closures that occupy ～30% of the nearshore fishing grounds could prevent suboptimal yields and fisheries collapse in nearshore East African reefs.
机译：通过齿轮限制或关闭管理过境渔业的长期后果是面临小规模渔业经理的许多困境。为了评估长期成果，捕捞努力和捕捞量从1995年到2019年，在肯尼亚的两个地区，1991年建立了海洋储备，另一个在2001年开始消除了破坏性的小型拖网网。股票生物质在12年学习着陆部位低于多数，最大可持续收益率（MMSY）和努力在所有地点下降，表明过度捕捞。两种干预措施都表现出每单位努力（CPUE）趋势的积极响应，表明成功管理，但随着齿轮限制的着陆位点，靠近近距离的变化更为持续。例如，齿轮限制部位的总产积率稳定地下降到平衡，即在预测的MMSY以下30％。相比之下，尽管库存水平低，但封闭式着陆场地在全时系列中保持了MMSY附近的收益率。这可能是由于在封闭件存在下从0.23的R 0.23到0.23的R的鱼回收率增加〜42％。该研究表明，占近岸渔场占〜30％的封闭可能会阻止近岸东非珊瑚礁的次优产量和渔业崩溃。

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    《Oceanographic Literature Review》 |2021年第5期|1133-1133|共1页
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