长江宜昌江段三层流刺网对鱼类资源影响的分析
发布时间：2018-10-26 10:43
【摘要】：利用2004~2009年长江宜昌江段三层流刺网的渔获物数据,分析三层流刺网的主要捕捞对象和个体大小,探讨三层流刺网对长江鱼类资源的影响。结果显示,采集到5目8科40种鱼类,主要捕捞对象为铜鱼、圆口铜鱼、瓦氏黄颡鱼、长吻洜和圆筒吻泩等喜流水的种类。三层流刺网主要捕捞对象的体长明显小于初次性成熟体长。本研究的分析结果说明三层流刺网的主要捕捞对象为喜流水、中下层鱼类的幼鱼,对鱼类资源造成了过度捕捞。为了保护长江鱼类资源,建议在长江水系开展全面禁渔。
[Abstract]:Based on the catch data of three laminar Gill nets in Yichang section of the Yangtze River from 2004 to 2009, the main fishing objects and individual sizes of the three layer Gill nets were analyzed, and the effects of the three laminar Gill nets on the fish resources of the Yangtze River were discussed. The results showed that 40 species of fishes belonging to 8 families of 5 orders were collected, and the main fishing objects were copper fish, cupreous fish, Pelteobagrus valvidraco, longicolor and Cylindrical fish. The body length of the main fishing object of the three laminar Gill net was obviously smaller than that of the primary sexual maturity. The results of this study show that the main fishing object of the three-layer Gill net is the love of flowing water, and the young fish of the middle and lower fishes cause overfishing to the fish resources. In order to protect the fish resources of the Yangtze River, it is suggested that a total fishing ban should be carried out in the Yangtze River system.
【作者单位】： 中国科学院水生生物研究所;中国科学院水生生物多样性与保护重点实验室;中国科学院大学;
【基金】：中国长江三峡集团科研项目(799522) 农业部公益性行业科研专项(201203086-08) 中国长江三峡集团公司科研项目(CT-12-08-01)
【分类号】：S931
本文编号：2295455
[Abstract]:Based on the catch data of three laminar Gill nets in Yichang section of the Yangtze River from 2004 to 2009, the main fishing objects and individual sizes of the three layer Gill nets were analyzed, and the effects of the three laminar Gill nets on the fish resources of the Yangtze River were discussed. The results showed that 40 species of fishes belonging to 8 families of 5 orders were collected, and the main fishing objects were copper fish, cupreous fish, Pelteobagrus valvidraco, longicolor and Cylindrical fish. The body length of the main fishing object of the three laminar Gill net was obviously smaller than that of the primary sexual maturity. The results of this study show that the main fishing object of the three-layer Gill net is the love of flowing water, and the young fish of the middle and lower fishes cause overfishing to the fish resources. In order to protect the fish resources of the Yangtze River, it is suggested that a total fishing ban should be carried out in the Yangtze River system.
【作者单位】： 中国科学院水生生物研究所;中国科学院水生生物多样性与保护重点实验室;中国科学院大学;
【基金】：中国长江三峡集团科研项目(799522) 农业部公益性行业科研专项(201203086-08) 中国长江三峡集团公司科研项目(CT-12-08-01)
【分类号】：S931
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，本文编号：2295455
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