Comparative evaluation of a mixed-fisheries effort-management system based on the Faroe Islands example
Comparative evaluation of a mixed-fisheries effort-management system based on the Faroe Islands example
复制标题
基于法罗群岛实例的混合渔业努力量管理系统的比较评估
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
J. Boje
中科院分区：
文献类型：
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作者：
A. Baudron;C. Ulrich;J. Nielsen;J. Boje
许多渔业，特别是混合渔业的总允许渔获量(TAC)管理未能达到养护目标。例如，就Faroe高原混合底层渔业而言，TAC系统未能实现鳕鱼(Gadus Morhua)、黑线鳕(Melanogrammus Aeglefinus)和沙鱼(Pollachius Virens)三大类鱼类的年平均捕捞死亡率为0.45的目标。因此，1996年，引入了个体可转让努力配额的努力管制制度来管理渔业。经验表明，没有额外的针对种群的措施的努力管理可能不适合这类渔业。开发了一个管理战略评价模型，以比较基于Faroese范例的努力管理系统和目前在欧盟渔业中应用的TAC系统。结果表明，当单独考虑库存时，总体允许努力系统并不一定比TAC系统表现更好。它取决于股票状态和动态、不确定性水平以及系统对科学建议变化的反应能力。然而，当在混合渔业中将种群放在一起考虑时，努力管理似乎是适当的，该系统的年际灵活性似乎是短期和长期目标以及生物可持续性和经济回报之间的最佳折衷。
Total allowable catch (TAC) management has in many fisheries, especially mixed fisheries, failed to meet conservation objectives. For instance, for the Faroe Plateau mixed demersal fisheries, the TAC system failed to achieve the objective of an average annual fishing mortality of 0.45 for the three gadoid stocks cod (Gadus morhua), haddock (Melanogrammus aeglefinus), and saithe (Pollachius virens). Therefore, in 1996, an effort-regulation system with individual transferable effort quotas was introduced to manage the fisheries. Experience has shown that effort management without additional stock-specific measures may not be appropriate for such fisheries. A management strategy evaluation model was developed to compare an effort-management system based on the Faroese example with a TAC system as currently applied in EU fisheries. Results show that when stocks are considered in isolation, a total allowable effort system does not necessarily perform better than a TAC one. It depends on stock status and dynamics, the level of uncertainty, and the reactivity of the system to changes in scientific advice. When the stocks are considered together in mixed fisheries, effort management seems, however, to be appropriate, and interannual flexibility of the system appears to be the best compromise between shortand long-term objectives, as well as between biological sustainability and economic return.