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首页> 外文期刊>ICES Journal of Marine Science >Indicators of fishing pressure and seafloor integrity
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Indicators of fishing pressure and seafloor integrity

机译：捕鱼压力和海底完整性指标

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摘要

This study calculates a suite of indicators reflecting the spatial extent of fishing and its impact on the seafloor and discusses the usefulness of these indicators to inform future management and the issues to consider. It explores several methods to calculate the indicators and shows that they can be informative to report on both fishing pressure and the status of the seafloor. However, although observed overall trends were robust against the specific method of calculation, the absolute values vary greatly with the calculation method. As both aspects are important from a policy perspective, agreement on the methodology to calculate the indicators is required. This study based on the Dutch Exclusive Economic Zone (EEZ) shows that it is possible to calculate indicators required to inform decision-makers on the pressure of fishing as well as the status of the seafloor pending a decision on the following issues: (ⅰ) choice of an appropriate grid cell resolution, (ⅱ) use of interpolated VMS tracks instead of VMS position registrations, (ⅲ) choice of an "intensity threshold" dependent on the benthic community recovery capacity, and (iv) the level of confidence required when assessing if an area is not impacted.
机译：这项研究计算出一套反映捕鱼空间范围及其对海底的影响的指标，并讨论了这些指标对未来管理和考虑问题的有用性。它探索了几种计算指标的方法，并表明它们可以提供有关捕鱼压力和海底状况的信息。但是，尽管观察到的总体趋势相对于特定的计算方法是可靠的，但是绝对值随计算方法的不同而有很大差异。由于从政策角度来看这两个方面都很重要，因此需要就计算指标的方法达成一致。这项基于荷兰专属经济区（EEZ）的研究表明，有可能计算出必要的指标，以使决策者了解捕鱼压力以及海底状况，以便就以下问题做出决定：（ⅰ）选择合适的网格单元分辨率，（ⅱ）使用插值的VMS轨迹代替VMS位置配准，（ⅲ）根据底栖群落恢复能力选择“强度阈值”，以及（iv）何时需要的置信度评估区域是否不受影响。

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