环境毒理
徐轶肖,江天久.塔玛亚历山大藻经蒙古裸腹溞至美国红鱼鱼苗的麻痹性贝类毒素传递与代谢研究[J].环境科学学报,2006,26(8):1331-1336
塔玛亚历山大藻经蒙古裸腹溞至美国红鱼鱼苗的麻痹性贝类毒素传递与代谢研究
- Transfer and metabolism of paralytic shellfish poisoning from Alexandrium tamarense to Moina mongolica and to Sciaenops ocellatus
- 基金项目：国家重点基础研究计划(973)项目(No.2001CB409709);国家高技术研究发展计划(863)项目(No.2002AA635150);温州市科技计划项目(No.S2006A007)
- 作者
- 单位
- 徐轶肖
- 1. 温州医学院海洋科学系, 温州 325035; 2. 暨南大学环境工程系, 广州 510632
- 江天久
- 1. 暨南大学环境工程系, 广州 510632; 2. 华南师范大学生命科学院, 广州 510631
- 摘要：首次采用枝角类作为麻痹性贝类毒素(Paralytic Shellfish Poisoning,PSP)海洋食物链传递的媒介,实验研究了PSP从甲藻塔玛亚历山大藻(Alexandrium tamarense)经枝角类蒙古裸腹溞(Moina mongolica)至美国红鱼(Sciaenops ocellatus)鱼苗的动态传递与代谢过程.结果表明,塔玛亚历山大藻为550～4900个·mL-1时,蒙古裸腹溞体内可以检测到麻痹性贝类毒素(PSP),美国红鱼鱼苗因摄入含PSP的蒙古裸腹溞而染毒.整个实验过程中,塔玛亚历山大藻、蒙古裸腹溞、美国红鱼消化腺均含有N-磺酰氨甲酰基类毒素C1+2,后者还检测到新生成的氨基甲酸酯类毒素neoSTX.毒素传递给蒙古裸腹溞时,C1+2中β型毒素C2的比例增大,传递给鱼苗时,则α型毒素C1的比例增加.毒素净化期间,鱼苗体内的C1、C2含量基本呈下降趋势,但neoSTX未呈现特定规律性;总毒素含量除藻密度550个·mL-1实验外,随净化时间的推移而下降.
- Abstract：The dynamic transfer and metabolism of paralytic shellfish poisoning (PSP) from dinoflagellate Alexandrium tamarense to cladoceran Moina mongolica and then to the larval fish of Sciaenops ocellatus were studied under controlled conditions. It was the first time to take cladoceran not copepod as experimental object in the marine food chain concerning the transfer and metabolism of PSP toxins. The transfer and metabolism of PSP toxins happened when Sciaenops ocellatus preyed on Moina mongolica that had ingested toxic Alexandrium tamarense ATCI01 whose concentration ranged from 550 cells·mL-1 to 4900 cells mL-1. All the trophic levels contained C1+2 toxins,while neoSTX toxin was detected in the digestive gland of Sciaenops ocellatus. The ratio of α toxin (C1) to β toxin (C2) in the Moina mongolica was lower than that in the Alexandrium tamarense and digestive gland of Sciaenops ocellatus. C1+2 toxins in larval fish reduced remarkably in the course of detoxification, and comparatively, neoSTX toxin didn't show the same tendence. The total content of PSP toxins decreased with the detoxification going except that the concentration of dinoflagellate was 550 cells·mL-1.
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