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Species composition and dominant species study on pelagic copepods in the East China Sea
Author(s): 
Pages: 35-40
Year: Issue:  1
Journal: JOURNAL OF FISHERIES OF CHINA

Keyword:  东海浮游桡足类种类组成优势种鳀渔场;
Abstract: 根据1997-2000年东海23°30′~33°N、118°30′~128°E水域4个季节海洋调查资料,对浮游桡足类种类组成及优势种作了探讨.东海浮游桡足类经鉴定共有226种,呈外海高近海低的分布趋势,夏季(163种)>秋季(152种)>春季(140种)>冬季(123种),4个季节皆出现的有78种.优势种(优势度Y≥0.02的17种,主要有中华哲水蚤(Calanus sinicus)、普通波水蚤(Undinula vulgaris)、精致真刺水蚤(Euchate concina)和亚强真哲水蚤(Eucalanus subcrassus)等, 季节更替明显,在秋、冬季优势种中还新出现了多种中、小型桡足类.北部近海(29°~32°N、125°E以西)春季中华哲水蚤、夏秋季精致真刺水蚤与水温、盐度多元一次逐步回归相关性显著(P<0.05),秋季普通波水蚤与水温、盐度相关性非常显著(P<0.01),春季(Engraulis japonicus)中心渔场(>100 kg·h-1)分布与中华哲水蚤高密集区(50~100ind·m-3)平面分布具有良好的对应关系;春、夏季鱼仔、稚鱼高密度区(≥100 ind·net-1)与中华哲水蚤高丰度区(50~100 ind·m-3)相重叠.
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