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首页> 外文期刊>ICES Journal of Marine Science >Management performance of ecological indicators in the Georges Bank finfish fishery
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Management performance of ecological indicators in the Georges Bank finfish fishery

机译：乔治银行有鳍鱼类渔业生态指标的管理绩效

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摘要

Successful implementation of Ecosystem-Based Fisheries Management (EBFM) requires appropriate action as informed by reference points in an ecosystem context. Thresholds in the response of ecological indicators to system drivers have been suggested as reference points for EBFM, though the management performance of these indicators and possible values for their reference points have not been widely evaluated. We used Management Strategy Evaluation to test the performance of control rules that used ecological indicators to adjust the advice from single-species stock assessments, using the Georges Bank finfish fishery as a case study. We compare the performance of control rules that used ecological indicators to that of single-species F-MSY control rules when the system dynamics were governed by the same multispecies population model. Control rules that used indicator-based reference points were able to perform better against catch and biodiversity objectives than when harvests were based on single-species advice alone. Indicators and values for reference points associated with good performance varied depending on the management objective. We quantified tradeoffs between total catch, biodiversity, and interannual variability in catch, noting that it was possible in some instances to achieve higher than average biodiversity while maintaining high catches using indicator-based control rules. While improved performance was noted using ecological indicators, outcomes were variable, and the gains in performance obtained may be similar to alternative methods of implementing precaution in single-species fishery control rules.
机译：成功实施基于生态系统的渔业管理（EBFM）需要采取适当的行动，这要参照生态系统环境中的参考点。有人建议将生态指标对系统驱动器的响应阈值作为EBFM的参考点，尽管这些指标的管理性能及其参考点的可能值尚未得到广泛评估。我们使用管理策略评估来测试控制规则的性能，该控制规则使用生态指标来调整单物种种群评估的建议，并以乔治银行有鳍鱼类渔业为例。当系统动力学由相同的多物种种群模型控制时，我们将使用生态指标的控制规则与单物种F-MSY控制规则的性能进行比较。与仅基于单一物种建议的收获相比，使用基于指标的参考点的控制规则能够更好地实现捕捞和生物多样性目标。与良好绩效相关的参考点的指标和值根据管理目标而变化。我们量化了总捕获量，生物多样性和捕获量的年际变化之间的权衡，并指出在某些情况下，可以使用基于指标的控制规则实现高于平均水平的生物多样性，同时保持高捕获量。尽管使用生态指标可以提高绩效，但结果却是可变的，所获得的绩效收益可能类似于在单物种渔业控制规则中实施预防措施的替代方法。

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