摘要
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 conicina)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),春季鳀(Engraulis japonicus)中心渔场(>100kg·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、夏季鳀鱼仔、稚鱼高密度区(≥100ind·net^(-1))与中华哲水蚤高丰度区(50～100ind·m^(-3))相重叠。
Based on 4 seasonal data of marine survey during 1997-2000, this paper deals with and approaches dominant species of copepods in 23°30′-33°N, 118°30′-128°E investigative waters in the East China Sea. In this paper 226 species of copepods have been identified, summer (163 species)>autumn (152 species)>spring (140 species)>winter (123 species). Among them, 78 species were found in 4 seasons. Dominant species (dominance(Y) ≥0.02) were 17 species, they were Calanus sinicus, Undinula vulgaris, Euchaeta concinna, and Eucalanus subcrassus etc. Some meso-small copepods were found in autumn and winter in dominant species. Seasonal variations of dominant species were obvious. Multiple correlation of abundance of Calanus sinicus, Euchaeta concinna and water temperature, salinity were obvious (P<0.05) in spring, that of Euchaeta concinna was very obvious (P<0.01) in autumn. In spring the correlation between distribution of fishing ground of anchovy (Engraulis japonicus) (>100kg·h^(-1)) and high-density area (50-100 ind.m^(-3)) of Calanus sinicus was obvious. High density area of both larvae and young fish of anchovy (≥100 ind·net^(-1)) and Calanus sinicus (50-100 ind·m^(-3)) was overlapped.
出处
《水产学报》
CAS
CSCD
北大核心
2004年第1期35-40,共6页
Journal of Fisheries of China
基金
国家"973"研究资助项目(G19990437)
关键词
东海
浮游桡足类
种类组成
优势种
水温
盐度
水产资源
the East China Sea
pelagic copepods
species composition
dominant species
fishing ground of anchovy
