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首页> 外文期刊>ICES Journal of Marine Science >Spanish otter trawl fisheries in the Cantabrian Sea
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Spanish otter trawl fisheries in the Cantabrian Sea

机译:坎塔布连海中的西班牙水獭拖网渔业

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摘要

A non-hierarchical classification technique (clustering large applications, CLARA) was used to identify four fishing tactics of Spanish otter trawlers in the Cantabrian Sea (ICES Division Vlllc) from 1983 to 2004: mixed fishing, blue whiting fishing, horse mackerel fishing, and mackerel fishing. There were no significant differences in the fishing tactics employed by two trawl fleets identified using a non-hierarchical classification technique (partition around medoids). There was, however, a decline in the use of the blue whiting fishing tactic from 2000 on, perhaps as a result of competition with pairtrawls, a gear whose main target species is blue whiting. There was an increase in the number of trips using the mackerel fishing tactic from 1996, a change possibly caused by improved market conditions. Between 2000 and 2004, the fleets had two distinct behaviour patterns, identified depending on the area in which they operated. The study area could therefore be subdivided into two areas based on the prevalence of the fishing tactic followed. The horse mackerel fishing tactic was more commonly used in the west, and the mixed fishing tactic in the east.
机译:从1983年到2004年,使用非分级分类技术(大型应用程序,CLARA)来识别坎塔布连海(ICES分区)的西班牙水獭拖网渔船的四种捕捞策略:混合捕捞,蓝鳕捕捞,鲭鱼捕捞和鲭鱼捕鱼。使用非分级分类技术(围绕类固醇分区)确定的两个拖网船队采用的捕鱼策略没有显着差异。但是,从2000年开始,蓝鳕鱼捕捞策略的使用有所减少,这可能是由于与成对拖网的竞争所致,该渔具的主要目标物种是蓝鳕鱼。从1996年开始,使用鲭鱼捕捞策略的出游次数增加了,这可能是由于市场条件改善所致。在2000年至2004年之间,车队有两种不同的行为模式,这取决于他们所运营的地区。因此,根据所采用的捕鱼策略的流行程度,可以将研究区域分为两个区域。在西部较普遍使用竹荚鱼捕鱼策略,在东部较常用混合捕鱼策略。

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  • 来源
    《ICES Journal of Marine Science》 |2010年第8期|p.1604-1616|共13页
  • 作者单位

    Instituto Espanol de Oceanografia, Promontorio de San Martin s, 39004 Santander, Spain;

    rnInstituto Espanol de Oceanografia, Promontorio de San Martin s, 39004 Santander, Spain;

    rnInstituto Espanol de Oceanografia, Promontorio de San Martin s, 39004 Santander, Spain;

    rnInstitute Espafiol de Oceanografia, Cabo Estay, Canido, 363090 Vigo, Spain;

    rnInstitute Espafiol de Oceanografia, Cabo Estay, Canido, 363090 Vigo, Spain;

    rnInstitute Espafiol de Oceanografia, Cabo Estay, Canido, 363090 Vigo, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cantabrian Sea; metier; otter trawl; segmentation;

    机译:坎塔布连海;中等水獭拖网分割;

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