东海毛颚类数量分布与环境关系  

Relationship between Chaetognatha abundance and environmental factors in the East China Sea

作　　者：徐兆礼[1] 戴一帆[2] 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 [2]复旦大学生命科学学院,上海200433

出　　处：《上海水产大学学报》2004年第3期203-208,共6页Journal of Shanghai Fisheries University

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,对东海毛颚类的数量分布,优势种丰度对总丰度变化的回归贡献进行了研究。结果表明:毛颚类总丰度有明显的季节变化,4季平均丰度(不含台湾海峡水域)为秋季(540ind/102m3)>夏季(322ind/102m3)>冬季(235ind/102m3)>春季(33ind/102m3);毛颚类高丰度区的移动和变化与带鱼渔场的移动和变化基本一致;春、秋季毛颚类总丰度与表层水温线性相关关系非常显著;肥胖箭虫(Sagittaenflata)、海龙箭虫(Sagittanagae)和百陶箭虫(Sagittabedoti)是构成东海毛颚类总丰度变化的最主要种类,其中肥胖箭虫具有较广泛的空间与时间分布的适应性,海龙箭虫分布的水温偏低,是影响冬、春季总丰度变化的主要优势种,百陶箭虫分布的水温偏高,是影响夏、秋季总丰度变化的主要优势种。Based on the data of four seasonal investigation in the East China Sea (23°30′～33°N,118°30′～128°E)in 1997-2000, this paper deals with the approach for abundance distribution of Chaetognatha and regression contribution of abundance of dominant species to total abundance. Results showed that there was clearly seasonal change for average abundance of Chaetognatha that was autumn(540ind/10^(2)·m^(3))>summer(322ind/10^(2)·m^(3))>winter(235ind/10^(2)·m^(3))>spring(33ind/10^(2)·m^(3)). The highly abundant area of Chaetognatha corresponded with fisheries ground of Largehead hairtail. The variation of Chaetognatha abundance was related remarkably with surface temperature in autumn. Sagitta enflata,Sagitta nagae and Sagitta bedoti were the most important dominant species that effected the changes of abundance of Chaetognatha in the East China Sea. Sagitta enflata can widely be distributed in different environment at the East China Sea in different seasons. Sagitta nagae distributed at the lower temperature was the mainly dominant species that affected variation of total abundance in the spring and winter. Sagitta bedoti distributed at the warmer temperature was the mainly dominant species that affected variation of total abundance in the autumn and summer.

关 键 词：东海 浮游动物 毛颚类 数量分布 回归贡献 

分 类 号：S932.8[农业科学—渔业资源]