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长江口自徐六经到佘山,面积约4000平方公里,是咸淡水交融的水域。这里有丰富的渔业资源,是苏、沪两地沿江渔民重要的捕捞场所。鉴于近廿多年来,随着自然生态环境等的变化,传统捕捞对象不断下降,为探明其原因,作者于1983年对设置在该地的定置张网进行渔获物分析,试图揭示种类组成及周年数量变化等规律,为制订合理的渔业资源管理措施提供参考。
The Yangtze Estuary from Xu six by Sheshan, an area of about 4000 square kilometers, is the brackish freshwater waters. There are abundant fishery resources here and it is an important fishing place for fishermen along the rivers of Jiangsu and Shanghai. In view of the fact that the traditional fishing objects have been declining due to the change of the natural ecological environment and so on over the past 20 years or so, the author conducted a catch analysis of the set-up webs set up there in 1983 in an attempt to reveal the species composition And the change of the number of annuities, which provide reference for the formulation of reasonable fisheries resources management measures.