东海毛颚类优势种及与环境的关系  

Relationships between dominant species of Chaetognatha and environmental factors in the East China Sea

作　　者：徐兆礼[1] 陈亚瞿[1] 

机构地区：[1]中国水产科学研究院东海水产研究所农业部海洋与河口渔业重点开放实验室,上海200090

出　　处：《中国水产科学》2005年第1期76-82,共7页Journal of Fishery Sciences of China

基　　金：国家重点基础研究发展规划(973)项目(G1999043707);国家海洋勘测专项(126).

摘　　要：根据1997～2000年东海23°30′～33°N、118°30′～128°E海域4个季节海洋调查资料,对东海毛颚类(Chaetognatha)优势种与环境的关系进行研究。结果表明,毛颚类优势种季节交替不明显,优势度最高的种分别是:夏季肥胖箭虫(Sagittaenflata)、冬、春季海龙箭虫(Sagittanagae)和秋季百陶箭虫(Sagittabedoti)。主要优势种中,百陶箭虫聚集强度指标值最高,其次是海龙箭虫,肥胖箭虫最低。肥胖箭虫与表层温度线性关系极其显著,肥胖箭虫和海龙箭虫与表层盐度的关系以及百陶箭虫与表层温度和表层盐度的关系符合YieldDensity模型。肥胖箭虫高丰度区往往位于台湾暖流与浙江沿岸流交汇处偏暖水的一侧,海龙箭虫高丰度区位于暖流与沿岸流交汇处偏冷水团的一侧。在水温较高的环境下,百陶箭虫高丰度区位于暖流与沿岸流交汇处偏淡水水团的一侧。Based on the data of four seasonal investigation in the East China Sea (23°30′-33°N、118°30′-128°E) during 1997-2000,this paper dealt with the approach for the relationship between dominant species of Chaetognatha and their environmental factors in the East China Sea.Results showed that seasonal variation of species composition was not remarkable.The species whose dominance was the highest in those seasons were Sagitta enflata in summer,Sagitta nagae in winter and spring and Sagitta bedoti in autumn.(Among) the three dominant species,the aggregate intensity of Sagitta bedoti was the highest,Sagittarian nagae was the second and Sagitta enflata was the lowest.The linear relation of Sagitta enflata abundance with surface water temperature was remarkablely positive.The relation of Sagitta enflata and Sagitta nagae abundances with surface salinity and that of Sagitta bedoti with surface temperature and salinity were showed respectively by Yield Density mold.The high density area of Sagitta enflata was distributed at the warm current side of the mixed waters formed by Taiwan Warm Current and Chinese Coastal Current and that of Sagitta nagae was located at the side of northern Chinece Coastal Current.The high density area of Sagitta bedoti was distributed at the side of southern Chinese Coastal Current in the summer and autumn.

关 键 词：东海 浮游动物 毛颚类 优势种 聚集强度 

分 类 号：S922.93[农业科学—渔业资源]