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根据1993~2002年南海区3省市渔业公司在南沙群岛西南陆架区底拖网的生产资料和渔业资源调查资料,分析了底拖网主要渔获种类组成和数量变动。结果表明,底拖网渔获种类组成基本相同,主要渔获经济种类有20多种,以蛇鲻属(Synodidae)、大眼鲷属(Priacanthidae)等底层鱼类为主,占总渔获物的70.9%。经济鱼类资源渔获率有明显的年间变动。底层鱼类资源除蛇鲻属和大眼鲷属外,其他种类如石斑鱼属(Serranidae)、鲱鲤属(Mullidae)、红笛鲷(L.sanguineus)、黄鳍马面(T.xanthopterus)、刺鲳(Psenopsis anomala)等波动很大,而中上层鱼类资源和头足类资源则相对稳定。分析认为捕捞是引起经济鱼类资源数量变动的主要原因。
According to the survey data on the production and fishing resources of the trawls at the southwest shelf area of the Nansha Islands from 1993 to 2002, the fishing companies of the three provinces in the South China Sea analyzed the changes of the composition and quantity of the main catch species. The results showed that the species composition of bottom trawl catch was basically the same, with more than 20 kinds of main catch economy. Most of the bottom catch fish, such as Synodidae and Priacanthidae, 70.9%. Catches of economic fish resources have obvious year-on-year changes. The underlying fish resources except Seriphidia and Gazella, other species such as Serranidae, Mullidae, L.sanguineus, T.xanthopterus ), Psenopsis anomala and other fluctuations, while the pelagic fish and cephalopod resources are relatively stable. Analysis shows that fishing is the main reason for the changes in the number of economic fish resources.