一、课题来源“群众渔业近底层变位拖网的研究”系1988年4月农业部水产司下达的研究课题,上海市郊区渔指部、东海水产研究所等单位承担了该课题的研究,该项研究通过网具设计研究,模型网试验,实船测试以及试捕与推广使用等步骤,突破了双船拖网在一定的幅度内,调节网位的技术难关,提高了群众渔业底拖网的捕捞效益。1990年12月通过了部级技术鉴定,属国内外首创。 First, the source of the project “the bottom of the mass fisheries trawl displacement study” Department of Agriculture in April 1988 issued by the Department of Fisheries Research topic, Shanghai Suburbs Fisheries Department, the East China Sea Fisheries Research Institute and other units bear the subject of the study The research breakthroughs the technical difficulties of adjusting the net position by means of the design and research of net tools, model net test, real-ship test, trial-catching and popularization and utilization, etc., breaking the double-trawling within a certain range and improving the fishing of bottom trawl benefit. In December 1990 passed the ministerial technical appraisal, is the first at home and abroad.