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首页> 外文会议>International Symposium on the Management and Biology of Dogfish Sharks >Sequel of the Directed Fishery for Spiny Dogfish (Spurdog) in the 1980s off the West Coast of Ireland
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Sequel of the Directed Fishery for Spiny Dogfish (Spurdog) in the 1980s off the West Coast of Ireland

机译：20世纪80年代，在爱尔兰西海岸的20世纪80年代刺绣渔业的续集

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The Northeast Atlantic contains one stock of spiny dogfish Squalus acanthias (also known as spurdog), which has been in decline since the 1960s. Landings reached a peak of 55,600 metric tons (mt) in 1963; 24 years later they had fallen to 44,600 mt and 12 years after that to 9,800 mt. The last phase of steep decline commenced in 1987 and coincided with heavy landings from mainly the Celtic Seas of which Ireland took a substantial share in a gill-net fishery off its southwest coast. At first the Irishgill-net fishery harvested predominantly female and pregnant spiny dogfish but the characteristics of the landings rapidly changed.Biological data from the southwest Ireland spiny dogfish fishery of the late 1980s are reviewed and additional data are assembled on commercial landings (to 2004), landings per recreational rod-angler-day (1978-2004), indications of the location of newlyborn pups from discard surveys and the changing distribution of pregnant females (1955-2004). The southwest Ireland fishery was conducted on an important pupping ground in the Celtic Sea. Tagging work demonstrated that the species follows a slow, clockwise migration northwards along the west coast of Ireland and eventually into the North Sea. Two pulses of recruitment, the second much smaller than the first, are tentatively identified, although the rapid fluctuations in the biological characteristics of the landings may indicate a more complex pattern.Female spawning stock biomass was targeted in the Irish gill-net fishery of the 1980s. Large females subsequently disappeared from the sea area to the north of the fishery. An argument is made that the Irish gill-net fishery intercepted migrations of dogfish to the North Sea.
机译：东北大西洋含有一股多刺的鲨鱼棱角楸（又称鹰狗），自20世纪60年代以来一直处于衰退。着陆于1963年达到55,600公吨（MT）的高峰; 24年后，他们已经跌至44,600吨，12年后至9800吨。最后一阶段陡峭的阶段开始于1987年开始，主要是主要的凯尔特海海域大幅着陆，爱尔兰在西南海岸的吉尔净渔业中占据了大量份额。首先，Ireishgill-Net渔业主要收获，主要是女性和怀孕的刺的鲨鱼，但着陆的特征迅速变化。来自20世纪80年代后期的西南爱尔兰刺狗鱼类的生物数据进行了审查，并在商业登陆时组装了附加数据（2004年） ，每次休闲杆 - 钓鱼者日（1978-2004）的着陆，迹象表明，新生幼虫从丢弃调查和孕妇的变化分布（1955-2004）。西南爱尔兰渔业是在凯尔特海的重要幼儿地面上进行的。标记工作表明，这些物种沿着爱尔兰西海岸向北慢慢地迁移，最终进入北海。两个招募脉冲，第二次小于第一，暂时识别，虽然着陆的迅速波动，但着陆的生物学特征可能表明了更复杂的模式。从爱尔兰鳃净渔业中瞄准了更复杂的模式。 20世纪80年代。大型女性随后从海域到渔业北部消失。一个论点是，爱尔兰吉尔净渔业截获了河北海的迁徙。

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