Temporal aggregation of bottom trawling and its implication for the impact on the benthic ecosystem

P. Danieel van Denderen; Niels T. Hintzen; Tobias van Kooten; Adriaan D. Rijnsdorp

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Temporal aggregation of bottom trawling and its implication for the impact on the benthic ecosystem

机译：底拖网的时间聚集及其对底栖生态系统的影响

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Understanding trawling impacts on the benthic ecosystem depends to a large extent on the ability to estimate trawling activity at the appropriate scale. Several studies have assessed trawling at fine spatial scales yearly, largely ignoring temporal patterns. In this study, we analysed these temporal patterns in beam trawl effort intensity at 90 stations of the Dutch continental shelf of the North Sea for a period of 10 years, at a fine temporal (weekly) and spatial (110 × 70 m) scale using Vessel Monitoring by Satellite (VMS) data. Our results show that trawling is aggregated in time and shows clear seasonality, related to the behavior of the fleet and migration patterns of the target fish species. The temporal patterns affect the overall impact on and the recovery of the benthic community, as is illustrated with a benthic population model. Our results imply that trawling impact studies using high-resolution data like VMS should take account of the possibility of temporal aggregation and seasonality in trawling to improve the assessment of the impact of trawling on the population dynamics of benthos.

机译：了解拖网对底栖生态系统的影响在很大程度上取决于以适当规模估算拖网活动的能力。数项研究每年都在精细的空间尺度上评估拖网渔船，而很大程度上忽略了时间模式。在这项研究中，我们使用时间（每周）和空间（110×70 m）的精细尺度，分析了北海荷兰大陆架90个站10年内的束拖努力强度的这些时间模式。卫星船只监视（VMS）数据。我们的结果表明，拖网捕捞是及时聚集的，并显示明显的季节性，与船队的行为和目标鱼种的迁移方式有关。时间模式会影响底栖动物群落的总体影响和恢复，如底栖动物种群模型所示。我们的结果表明，使用像VMS这样的高分辨率数据进行的拖网影响研究应考虑到拖网中时间聚集和季节性的可能性，以改善对拖网对底栖动物种群动态影响的评估。

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来源
《ICES Journal of Marine Science》 |2015年第3期|952-961|共10页
作者
P. Danieel van Denderen; Niels T. Hintzen; Tobias van Kooten; Adriaan D. Rijnsdorp;
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作者单位

Wageningen Institute for Marine Resources and Ecosystem Studies (IMARES), PO Box 68, IJmuiden 7970 AB, The Netherlands,Aquaculture and Fisheries, Wageningen University, PO Box 338, Wageningen 6700 AH, The Netherlands;

Wageningen Institute for Marine Resources and Ecosystem Studies (IMARES), PO Box 68, IJmuiden 7970 AB, The Netherlands;

Wageningen Institute for Marine Resources and Ecosystem Studies (IMARES), PO Box 68, IJmuiden 7970 AB, The Netherlands;

Wageningen Institute for Marine Resources and Ecosystem Studies (IMARES), PO Box 68, IJmuiden 7970 AB, The Netherlands,Aquaculture and Fisheries, Wageningen University, PO Box 338, Wageningen 6700 AH, The Netherlands;

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正文语种 eng
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关键词
benthos; bottom trawling; ecosystem-based fishery management; North Sea; temporal effort distribution; Vessel Monitoring by Satellite;

机译：便当拖网底基于生态系统的渔业管理;北海;时间精力分配;卫星船只监测;

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Temporal aggregation of bottom trawling and its implication for the impact on the benthic ecosystem

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