| 摘要: |
| 研究了2005年4个季度用浅海III型网在长江口40个站位采集的浮游生物样品，发现砂壳纤毛虫11种：Codonellopsis ostenfeldi，C. parva，Eutintinnus tenuis，Favella panamensis，Leprotintinnus nordqvisti，Leprotintinnus sp.，Tintinnopsis japonica，T. karajacensis，T. mortensenii，T. radix，T. schotti。Leprotintinnus sp.,最大丰度可达32 400个/ m3，有的种的最大丰度不足200个/ m3，如Codonellopsis parva，E. tenuis和T. mortensenii。冬季T. japonica主要分布于长江口外，Leprotintinnus sp. 在春、夏、秋季都主要分布于长江口外，其他种的分布没有明显规律。在4个季度长江口内都没有发现砂壳纤毛虫。
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| 关键词: 砂壳纤毛虫 丰度 长江口 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(40876085); 国家重点基础研究规划项 |
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| Horizontal distribution of large tintinnids in Yangtze River |
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ZHANG Wu-chang,WANG Ke,XIAO Tian
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| Abstract: |
| Species composition and abundance of large tintinnids (>76 mm) in the Yangtze River estuary were studied in four seasonal cruises in 2005. Samples were taken by vertically towing a Shallow Water III plankton net from bottom to surface. Totally 11 tintinnid species were found: Codonellopsis ostenfeldi，C. parva，Eutintinnus tenuis，Favella panamensis，Leprotintinnus nordqvisti，Leprotintinnus sp.，Tintinnopsis japonica，T. karajacensis，T. mortensenii，T. radix，and T. schotti. Maximum abundance of Leprotintinnus sp. was 32400 ind./m3 while maximum abundance of some species was lower than 200 ind./m3 (C. parva，E. tenuis and T. mortensenii)。And T. japonica mainly distributed in the area out of Yangtze River mouth in winter. Leprotintinnus sp. occurred in the area out of Yangtze River mouth in spring, summer and autumn. No tintinnid was found inside the Yangtze River in the four cruises.
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| Key words: Tintinnid abundance Yangtze River estuary |
