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根据2001年4月、6月、9月和12月东海中部(27°00′～30°00′N、122°30′～127°00′E)底拖网调查资料,分析了该海域鱼类群落多样性的季节变化。调查中共捕获鱼类161种,平均站位出现鱼类10.95种;优势种类中除了带鱼(Trichiurusjaponicus)、银鲳(Pampusargenteus)、小黄鱼(Larimichthyspolyactis)等经济种类外,其它大部分种类为经济价值不高或小型的鱼类。各调查航次的优势种类排序和组成不同。通过分析发现东海中部鱼类群落多样性指数较低,同时各调查月份的多样性指数差异较大,6月份的各项指数均为最低,12月份为最高,这是各调查月份主要种类的优势度不同引起的。
According to the bottom trawl survey data of central East China Sea (27 ° 00 ’~ 30 ° 00’N, 122 ° 30’ ~ 127 ° 00’E) in April, June, September and December 2001, Seasonal Variation of Community Diversity. A total of 161 species of fish were caught in the survey, with 10.95 species of fish on average. Most of the dominant species except for the economic species Trichiurus japonicus, Pampus arginteus and Larimichthys polyactis were of low economic value Or small fish. The voyage of the investigation of the advantages of different types of composition and composition. The results showed that the diversity index of fish communities in the central East China Sea was lower than that of other surveyed species, and the diversity index in each survey month was quite different. The indexes in June were the lowest and the highest in December, which were the main types of advantages in each survey month Different degrees caused.