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首页> 外文期刊>Journal of Northwest Atlantic Fishery Science >Population Structure of Greenland Halibut (Reinhardtius hippoglossoides) in the Northeast Arctic, 1992-2000
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Population Structure of Greenland Halibut (Reinhardtius hippoglossoides) in the Northeast Arctic, 1992-2000

机译：1992-2000年东北北极格陵兰大比目鱼（Reinhardtius hippoglossoides）的种群结构

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摘要

The variation in population structure of Greenland halibut (Reinhardtius hippoglossoides Walbaum) in the Northeast Arctic is analysed using data from three different surveys using trawl, longline and gillnet gears, in the slope area of the western Barents Sea in the period 1992-2000. The design of the longline and gillnet survey had limitations in that they were set to simulate the commercial fisheries, but the vessels were forced to cover the most important part of the slope area. Greenland halibut was the dominant species both in numbers and weight and was usually caught in the range of 5-15 years old, but the catch was dominated by ages 6-12. The data showed differences in sex composition and age composition both by area and by depth, and catches from trawl showed the most evident pattern. Greenland halibut caught by gillnet were larger and older than fish caught by trawl and the results from longline were in between. In most of the age groups, males were significantly smaller than females and this general trend was shown for all gears. Males also dominated the younger age groups in all gears and Greenland halibut older than 10 years were virtually all females. Fish from the earliest cohorts in the years investigated were generally smaller than fish from later ones.
机译：利用三项不同的调查数据，使用拖网渔船，延绳钓渔具和刺网渔具，在1992-2000年期间对东北北极格陵兰大比目鱼（Reinhardtius hippoglossoides Walbaum）的种群结构进行了分析。延绳钓和刺网调查的设计存在局限性，因为它们被设置为模拟商业性渔业，但是船只被迫覆盖了斜坡地区最重要的部分。格陵兰大比目鱼是数量和重量均占主导地位的物种，通常被捕捞的年龄为5-15岁，但捕捞的主要年龄为6-12岁。数据表明，按面积和深度，性别组成和年龄组成存在差异，而拖网渔获物表现出最明显的模式。刺网捕获的格陵兰大比目鱼比拖网捕捞的大，大，而延绳钓的结果介于两者之间。在大多数年龄组中，雄性明显小于雌性，所有齿轮均显示出这种总体趋势。在所有装备中，男性也占据了较年轻的年龄段，而年龄超过10岁的格陵兰大比目鱼几乎全部是女性。在调查的年份中，最早一批的鱼通常比后来一批的鱼小。

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