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根据2006年8月(夏)、2007年1月(冬)、5月(春)和11月(秋)4个季节在舟山渔场及邻近海域(29°30′~31°30′N,124°30′E以西)开展海洋生态系统综合调查所获得的资料,分析了该海域桡足类的种类组成和数量分布特征。结果表明,该次调查海域共鉴定桡足类65种,其中:4个季节皆出现的种类有10种,占总种数的15.38%。优势种为中华哲水蚤(Calanus sini-cus)、精致真刺水蚤(Euchaeta concinna)、微刺哲水蚤(Canthocalanus paupe)和缘齿厚壳水蚤(Scolecithrixnicobarica)等10种。根据优势度和回归贡献分析表明,春、夏、秋、冬4个季节总丰度分布主要取决于中华哲水蚤、精致真刺水蚤、缘齿厚壳水蚤和微刺哲水蚤的分布,且优势种季节更替显著。桡足类丰度高值区位于不同水系交汇的混合水域,4个季节丰度平均值变化为春季(567.4 ind.m-3)>夏季(104.12 ind.m-3)>秋季(97.23 ind.m-3)>冬季(72.45 ind.m-3)。
According to the four seasons of August 2006 (summer), January 2007 (winter), May (spring) and November (autumn), the fishing grounds and adjacent waters of Zhoushan (29 ° 30 ’~ 31 ° 30’N, 124 West of 30 ° E), the species composition and quantitative distribution characteristics of copepods in this area were analyzed. The results showed that there were 65 species of copepods identified in the survey, of which 10 species were found in 4 seasons, accounting for 15.38% of the total. The dominant species were Calanus sini-cus, Euchaeta concinna, Canthocalanus paupe and Scolecithrix nicobarica. According to the analysis of dominance and regression contribution, the distribution of total abundance in spring, summer, autumn and winter mainly depends on the abundance of Daphnia magna, Daphnia maggot, Daphnia maggot Distribution, and the dominant species change significantly. The high abundance area of copepods was located in the mixed waters where different water systems converged. The average abundance of four seasons varied from spring (567.4 ind.m-3)> summer (104.12 ind.m-3)> autumn (97.23 ind. m-3)> Winter (72.45 ind.m-3).