Effort reduction and the large fish indicator: spatial trends reveal positive impacts of recent European fleet reduction schemes

GEORG H. ENGELHARD; CHRISTOPHER P. LYNAM; BERNARDO GARCIA-CARRERAS; PAUL J. DOLDER; STEVEN MACKINSON

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Effort reduction and the large fish indicator: spatial trends reveal positive impacts of recent European fleet reduction schemes

机译：减少工作量和大型鱼类指标：空间趋势显示了最近欧洲减少船队计划的积极影响

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The large fish indicator (LFI), or 'proportion of fish greater than 40 cm length in bottom trawl surveys,' is a frequently debated indicator of Good Environmental Status in European regional seas. How does the LFI respond to changes in fishing pressure? This question is addressed here through analysis of fine-scale spatial trends in the LFI within the North Sea, compared between two periods of contrasting fisheries management: 1983-1999 and 2000-2012, respectively, before and after the onset of the European Union's fleet reduction scheme. Over the entire period, the LFI has decreased in large parts of the North Sea. However, most of the decline was from 1983-1999; since 2000 the LFI has improved in much of the North Sea, especially in UK waters. Comparison with international effort data shows that those western areas where the LFI has improved correspond with regions where otter trawl effort has decreased since 2000 (and previously was highest in the 1990s), and also with decreases in beam trawl effort. This study provides strong support that recent European effort reduction schemes are now beginning to result in an improved ecosystem state as indicated by the regional-scale improvement in the LFI.

机译：大型鱼类指标（LFI），或“海底拖网调查中长度大于40厘米的鱼类比例”，是欧洲区域海洋中良好环境状况的备受争议的指标。 LFI如何应对捕捞压力的变化？通过分析北海LFI的精细尺度空间趋势，并在两个相反的渔业管理时期（分别为1983-1999年和2000-2012年）之间进行比较，解决了这个问题：减少方案。在整个时期内，北海大部分地区的土地退化指数都下降了。但是，下降的大部分是从1983年至1999年。自2000年以来，LFI在北海大部分地区都有所改善，尤其是在英国水域。与国际努力数据的比较表明，LFI改善的西部地区与水獭拖网工作量自2000年以来有所减少（以前是1990年代最高）以及梁拖网工作量减少的地区相对应。这项研究提供了有力的支持，如LFI的区域规模改善所表明的那样，最近的欧洲减少努力计划现在开始导致生态系统状态的改善。

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来源
《Environmental Conservation》 |2015年第3期|227-236|共10页
作者
GEORG H. ENGELHARD; CHRISTOPHER P. LYNAM; BERNARDO GARCIA-CARRERAS; PAUL J. DOLDER; STEVEN MACKINSON;
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作者单位

Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft NR33 0HT, UK;

Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft NR33 0HT, UK;

Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft NR33 0HT, UK;

Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft NR33 0HT, UK;

Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft NR33 0HT, UK;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
fishing effort; fleet reduction scheme; Good Environmental Status (GES); indicator; large fish indicator (LFI); Marine Strategy Framework Directive (MSFD); trawling impacts;

机译：捕捞努力;减少车队计划;良好的环境状况（GES）;指示符;大鱼指示器（LFI）;海洋战略框架指令（MSFD）;拖网的影响;

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Effort reduction and the large fish indicator: spatial trends reveal positive impacts of recent European fleet reduction schemes

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