| 摘要: |
| 于2000—2001年采集了中国沿海10个采样点的表层沉积物样品, 研究了有毒亚历山大藻(Alexandrium spp.)和链状裸甲藻(Gymnodinium catenatum)孢囊的分布。结果表明,这两类孢囊几乎在所有采样点都检测到。链状裸甲藻孢囊虽分布广泛,但含量较低,在样品中的浓度和百分比含量分别为0—71.1cysts/g DW和0%—14.3%。亚历山大藻孢囊在大部分海域含量较低,而在PSP毒素中毒事件高发区和贝类PSP毒素高含量区的大亚湾大鹏澳海域却高密度、高频率地出现,最高密度为366cysts/g DW。研究结果显示,大亚湾大鹏澳海域表层沉积物中高密度的亚历山大藻孢囊也许是该海域贝类体内冬季PSP毒素积累及高含量的重要原因之一。
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| 关键词: 甲藻孢囊,中国沿海,亚历山大藻,链状裸甲藻,PSP |
| DOI：10.11693/hyhz200304009009 |
| 分类号: |
| 基金项目:国家自然科学基金重大项目资助,3979110号;国家重点基础发展规划(973)项目资助,2001CB409701号 |
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| DISTRIBUTION OF CYSTS OF TOXIC ALEXANDRIUM SPP. AND GYMNODINIUM CATENATUM ALONG THE CHINESE COASTAL WATERS |
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WANG Zhao-Hui1, MATSUOKA Kazumi2, QI Yu-Zao1, Lu Seng-Hui1
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1.Institute of Hydrobiology, College of Life Science and Technology, Jinan University;2.Laboratory of Coastal Environmental Sciences, Faculty of Fisheries, Nagasaki University
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| Abstract: |
| Surface sediments were sampled from 10 stations along the Chinese coasts from 2000 to 2001 in order to study the distribution of cysts of toxic Alexandrium spp. and Gymnodinium catenatum. Results showed that both cysts distributed widely in the China Sea, and were detected almost in all stations. G. catenatum occurred commonly but in Less concentrations, with the concentrations and relative frequencies of 0—71.1 cysts/g DW and 0%—14.3%, respectively. On the other hand, cysts of Alexandrium mainly ellipsoidal cysts of A. catenella and A. tamarense complex occurred frequently and abundantly in Dapengao area of Daya Bay, the South China Sea, where high occurrence of PSP incidents and high contents of PSP in shellfishes have been reported. Results suggested that cysts of Alexandrium in surface sediments in Daya Bay may be the important source of PSP toxin in shellfish and resulf in high values of PSP contented in shell fishes in winter.
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| Key words: Dinoflagellate cyst, The Chinese coasts, Alexandrium spp., Gymnodinium catenatum, PS |
