| 东海浮游介形类(Ostracods)分布特征 |
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| 引用本文： | 徐兆礼.东海浮游介形类(Ostracods)分布特征[J].海洋学报,2006,28(2):101-108. |
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| 作者姓名： | 徐兆礼 |
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| 作者单位： | 中国水产科学研究院, 东海水产研究所, 上海, 200090;农业部海洋与河口渔业重点开放实验室, 上海, 200090 |
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| 基金项目： | 国家自然科学基金重大研究计划全球变化及其区域响应(90511005)，我国近海海洋综合调查与评价专项(908-02-01-03) |
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| 摘 要： | 根据1997~2000年东海(23°30'~33°00'N,118°30'~128°00'E)海域四季海洋调查资料,探讨了东海浮游介形类分布特征及与环境的关系.结果表明:东海浮游介形类丰度占浮游动物总丰度的3.47%;春、夏、秋和冬四季平均丰度分别为0.70,1.72,2.57和0.90个/m3;冬春季的短棒真浮萤(Euconchoecia chierchiae),夏季的后圆真浮萤(Euconchoecia maimai)和秋季的齿形海萤(Cypridi-na dentata)分别是各季的主要优势种;夏、秋季介形类总丰度与水文环境因子的线性相关性不显著,春季与表层盐度相关,冬季与表层温度相关.东海北部外海四季均有介形类高丰度区出现,但在东海北部近海长江口及其邻近舟山水域,介形类数量相对较低.在东海南部,冬春季高丰度区位于外海,夏秋季在近海.东海浮游介形类基本上是一大类较为典型的暖水性且具有集群行为的海洋浮游动物.介形类秋季高丰度区和较高丰度区的分布与太平洋褶柔鱼(Todarodes pacificus)、绿鳍马面鲀(Navodon Septentrionalis)、鲐鯵鱼类等渔场的位置基本一致,在渔业上有重要的意义.
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| 关 键 词： | 东海 浮游动物 浮游介形类 数量分布 |
| 文章编号： | 0253-4193（2006）02-0101-08 |
| 收稿时间： | 06 8 2005 12:00AM |
| 修稿时间： | 2005-06-082005-12-27 |
Characteristics for distribution of pelagic Ostracods in the East China Sea |
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| XU Zhao-li.Characteristics for distribution of pelagic Ostracods in the East China Sea[J].Acta Oceanologica Sinica (in Chinese),2006,28(2):101-108. |
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| Authors: | XU Zhao-li |
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| Institution: | Key and Open Laboratory of Marineand Estuary Fisheries, Ministry of Agriculture of China, Shanghai 200090, China;East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Shanghai 200090, China |
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| Abstract: | On the basis of the data of four seasonal investigations in the East China Sea (23°30'~33°00'N,118°30'~128°00'E) from 1997 to 2000,the distribution and the seasonal changes of Ostracods abundance and the relationship between its abundance dynamics and environment and fishing ground were discussed in this paper through qualitative and quantitative methods.Results showed that the average abundance (2.57 ind/m3) of Ostracods peaked in autumn,which was equal to 41.59% of total abundance in four seasons.It was the second highest value (1.72 ind/m3) in summer,equaled to 36.55% of the total abundance.0.90 ind/m3 in winter and 0.70 ind/m3 in spring,which was the lowest value in four seasons.The dominant species of Ostracods separately were Euconchoecia chierchiae Muller in spring and winter,Euconchoecia maimai.Tseng in summer and Cypridina dentata (Muller) in autumn.Moreover,it was found that the total abundance showed linear correlation with surface salinity in spring and with surface water temperature in winter,while the abundance in summer and autumn did not show significant correlation with hydrogr aphic environmental factors.Ostracods,whose abundance was equal to 3.47% in the total zooplankton,only being lower. Copepods and Decapods in pelagic Crustacean,was an important pelagic animal.High abundance area of Ostr acods was located in north offshore of the East China Sea for four seasons while low abundance area occurred in nearshore of Zhoushan fishing ground.In south of the East China Sea,high abundance area of Ostracods was located in offshore in winter and spring but nearshore in summer and autumn.These suggested that Ostracods was a kind of typical warm water zooplankt on whose abundance was related to high water temperature seasons or warm water current.The agg regated behavior of Ostracods was dependent on the influence of its dominant species.It was also found that Ostracods,whose hig habundance area of very nearly overlapped the grazing areas of Todarodes pacificus,Navodon Septentrionalis and Scomber japonicus,became a kind of important diet for fish because of their characteristics of distribution and aggregation. |
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| Keywords: | East China Sea zooplankton pelagic Ostracods aggregation |
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