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,运用定量、定性分析方法,探讨了东海浮游磷虾类总丰度的平面分布、季节变化,相应的动力学及与渔场的关系。结果表明,东海磷虾类总丰度秋季最高,春季次之,冬季最低;冬,春,夏季的小型磷虾(Euphausianana)和秋季的中华假磷虾(Pseudeuphausiasinica)对总丰度的贡献较大,是影响磷虾类总丰度变化的主要优势种;冬、春和秋季总丰度与水文环境因子的线性相关性不显著,夏季总丰度与底层温度和10m层盐度的二元线性相关关系非常显著。秋季磷虾高丰度区位于台湾暖流与各水团的交汇处。磷虾类总丰度的变化动力来自水团的影响和主要优势种对总丰度变化的回归贡献,后者与优势种的生态习性有关。磷虾类秋季高丰度区的分布与带鱼、小黄鱼和日本鲭索饵场的位置基本一致。
Based on the data of four seasonal investigations in the East China Sea (23°30′-33°N, 118°30′-128°E)from 1997 to 2000, the distribution and the seasonal changes of Euphausiids abundance and the relation between its abundance dynamics and fish ground were discussed in this paper through qualitative and quantitative methods. Results showed that the total abundance of Euphausiids peaked in autumn, and declined to the lowest in winter. The abundance in spring was the second highest in four seasons. Since Euphausia nana in winter, spring, summer and Pseudeuphausia sinica in autumn contributed more to the total abundance, they actually dominated the variations of the total abundance. Moreover, it was found that the total abundance in summer showed linear correlation with bottom water temperature and 10m salinity, while the abundance in other three seasons did not show significant correlation with hydrographic factors. High abundance area of Euphausiids was located in the converging area of Taiwan warm current and other water masses in autumn, suggesting that the variation of the total abundance was dependent on water masses and the dominant species. The latter was also related to their ecological features. It was also found that the high abundance area nearly overlapped the grazing areas of some economic fishes such as Trichiurus lepturus, Scomber japonicus and Larimichthys polyactis.
出处
《水产学报》
CAS
CSCD
北大核心
2005年第3期373-378,共6页
Journal of Fisheries of China
基金
国家重点基础研究发展规划(973)项目(2001CB409700-07)
关键词
东海
浮游动物
磷虾类
数量分布
East China Sea
zooplankton
Euphausiids
abundance distribution
