黄海北部单船有翼单囊底拖网结构优化研究
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- 英文论文题名：Research on Structure Optimization of the bottom trawl in the north of the Yellow Sea
- 论文作者：周景宇 ; 王振宇 ; 邢彬彬 ; 庄鑫 ; 张国胜
- 英文论文作者：ZHOU Jingyu ; WANG Zhenyu ; XING Binbin ; ZHUANG Xin ; ZHANG Guosheng ; Center for Marine Ranching Engineering Science Research of Liaoning ; Dalian Ocean University
- 年：2016
- 作者机构：大连海洋大学辽宁省海洋牧场工程技术研究中心;
- 论文关键词：底拖网 ; 结构优化 ; 渔获量 ; 对比分析
- 英文论文关键词：bottom trawl ; Structure Optimization ; Catch ; Comparative analysis
- 会议召开时间：2016-11-02
- 会议录名称：2016年中国水产学会学术年会论文摘要集
- 语种：中文
- 分类号：S972.13
- 学会代码：OGSB
- 会议名称：2016年中国水产学会学术年会
- 会议地点：中国四川成都
- 主办单位：中国水产学会、四川省水产学会
- 学会名称：中国水产学会
- 页数：1
- 文件大小：507k
- 原文格式：D
- 会议级别：全国
摘要
单船有翼单囊底拖网是黄海北部海域主要的作业渔具之一,由于在捕捞过程中兼捕现象严重,且渔获物中存在大量稚幼鱼,使渔业资源逐渐衰退。因此,为了保护稚幼鱼资源,减弱兼捕现象,将原网第五节网背网衣的网目尺寸由30mm增大到70mm。试验采用交替作业法,在海洋岛附近海域进行原网和试验网各十网次的对比试验。研究结果表明:试验网的渔获重量比原网减少69.87kg。其中,两种网具共捕渔获物28种,试验网的渔获种类比原网减少8种,兼捕情况得到一定改善。在原网和试验网中不同渔获物体长分布情况中得到,与原网相比,试验网中各渔获物种类的主捕体长范围增加,不仅说明试验网释放了体长较小的渔获物,稚幼鱼资源得到保护,而且捕获优质鱼的比例也在提升。
The bottom trawl is one of the main fishing gears in the Yellow sea. Due to a large number of bycatch and the capture of juveniles, the fishery resources decline rapidly. Therefore, in order to protect juveniles resources and reduce bycatch, the fifth nets of original net was increased from 30 mm to 70 mm. A comparative test was carried out on the sea. The results showed that the weight of the test net reduce 69.87 kg than the original net and the two kinds of fishing nets caught a total of 28 species of fish. Fish species in test net was less than that of original net. Bycatch was reduced in test net. Comparing to the original net, the minimum length of fish increased in the test net. This illustrates that the test net could release juveniles, protect juveniles resources and capture high-quality fish.
The bottom trawl is one of the main fishing gears in the Yellow sea. Due to a large number of bycatch and the capture of juveniles, the fishery resources decline rapidly. Therefore, in order to protect juveniles resources and reduce bycatch, the fifth nets of original net was increased from 30 mm to 70 mm. A comparative test was carried out on the sea. The results showed that the weight of the test net reduce 69.87 kg than the original net and the two kinds of fishing nets caught a total of 28 species of fish. Fish species in test net was less than that of original net. Bycatch was reduced in test net. Comparing to the original net, the minimum length of fish increased in the test net. This illustrates that the test net could release juveniles, protect juveniles resources and capture high-quality fish.
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