黄海双船有翼单囊拖网网囊最小网目尺寸研究  

Minimal cod-end mesh of a pair trawl in the Yellow Sea

作　　者：陈仁杰 李显森[2] 樊钢洲 赵宪勇[2,3] 张国胜 CHEN Ren-jie;LI Xian-sen;FAN G a n g-zhou;Z H A O Xian-yong;Z H A N G G u o-sheng(College of Marine Science and Environment, Dalian Ocean Lniversity , Dalian 116023, China;Key Laboratoiy of Sustainable Development of Ma-rine Fisheries , Ministiy of Agriculture , Key Laboratoiy for Fisher ^7 Resources and Eco-Environment, Shandong Province, Yellow Sea Fisheries Research Institute , Chinese Academy of Fishery Sciences, Qingdao 266071, China;Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China)

机构地区：[1]大连海洋大学海洋科技与环境学院,辽宁大连116023 [2]中国水产科学研究院黄海水产研究所农业部海洋渔业可持续发展重点实验室山东省渔业资源与生态环境重点实验室,山东青岛266071 [3]青岛海洋科学与技术国家实验室海洋渔业科学与食物产出过程功能实验室,山东青岛266237

出　　处：《大连海洋大学学报》2018年第2期258-264,共7页Journal of Dalian Ocean University

基　　金：农业部渔政管理项目(2130110161054;ZT62201616182)

摘　　要：为支撑《全国海洋捕捞渔具目录》的实施与管理,针对黄海双船有翼单囊拖网的网目选择性,于2017年8月在黄海南部的海州湾水域进行了不同网囊网目尺寸(40、54、60、70、90 mm)的套网法拖网试验,通过分析不同网目尺寸(40、54、60、70、90 mm)下主要渔获的逃逸率与幼鱼的释放效果,并结合数学建模方法对生态效益和经济效益进行了权衡研究。结果表明:随着网囊网目尺寸的增大,渔获逃逸率逐渐增加,对幼鱼的释放效果显著,从生态保护方面考虑,根据目前的资源状况,网囊网目尺寸可放大至80 mm以上;当网囊网目尺寸小于56 mm时,释放效果显著,当网目尺寸大于56 mm时,经济效益损失显著。研究表明,为了权衡生态效益和经济效益,建议将56 mm作为制定黄海双船有翼单囊拖网网囊最小网目尺寸的参考标准。The escape rate of main catches and release of juvenile fish were studied using a pair trawl with double wings and single cod-end by cover-nets with cod-end mesh of 40,54,60,70 and 90 mm in Haizhou Bay in the southern Yellow Sea in August 2017 in order to support the implementation and management of Natural Marine Fishing Gear Catalog and study the selectivity of cod-end mesh of pair trawl with double wings and single cod-end. A balance of ecological effectiveness and economic effectiveness was made with a mathematical modeling method. It was found that the escape rate of fish was increased gradually with the increment in cod-end mesh size,and that the release effect of juvenile fish appeared to be elevated significantly. The mesh size of cod-end was shown to be enlarged to more than 80 mm based on the ecological protection under the present fishery resources in the Yellow Sea. The remarkable release effect was observed at the mesh size of 56 mm,and the significant loss of economic effectiveness was found at the mesh size of 56 mm. Therefore it is suggested that the mesh size of 56 mm be of scientific reference to the standard of the minimum cod-end mesh size of pair trawl in the Yellow Sea in order to balance the ecological effectiveness and economic effectiveness.

关 键 词：双船有翼单囊拖网 幼鱼比例 逃逸率 释放效果 生态效益 经济效益 最小网目尺寸 

分 类 号：S932.4[农业科学—渔业资源]