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有毒亚历山大藻对卤虫存活率和摄食率的影响
The effects of toxic Alexandrium species on the survival and feeding rateof brine shrimp Artemia salina

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吴振兴 1   邹迎麟 1   朱明远 1   王宗灵 1   王丹 2  
文摘 研究了有毒亚历山大藻对卤虫存活率和摄食率两方面的影响,得出以下结论:在卤虫存活率实验中,有毒亚历山大藻在2000 cells/ml的密度下,对卤虫具有致死效应,卤虫在24～168 h内全部死亡;在摄食实验中,有毒亚历山大藻对卤虫的摄食产生明显的抑制作用,卤虫对有毒藻的平均摄食率明显低于无毒藻组和混合实验组。在加入无毒藻东海原甲藻的混合培养状态下,卤虫存活率上升,30～60min摄食率增加,东海原甲藻在一定程度上可以减轻塔玛亚历山大藻对卤虫的毒害作用。有毒藻产生的PSP毒素并非导致卤虫死亡的主要原因,毒害作用可能与出现在卤虫体外的黏附物质有关。通过对3个不同生长期卤虫的研究发现,后无节幼体卤虫对有毒亚历山大藻的毒害作用最为敏感。
其他语种文摘 Zooplankton is an important link between phytoplankton and higher consumers, In order to investigate the harmful effects of toxic dinoflagellate Alexandrium species on zooplankton, four strains of Alexandrium spp., isolated from the Chinese coast, were used to test the species' effects on survival and feeding rate of the brine shrimp, Artemia salina. The experiment was designed to assess the A. salina' s response in each of its life cycle stages: nauplii, metanauplii and adult. Each experiment was conducted in a 500 ml treatment was added. The toxic treatments consisted of single strains of A. minutum, A. catanella and A. tamarense(Nanhai and Donghai strain), while non-toxic species (dinoflagellate Prorocentrum donghaiense and diatom Chaetoceros minutissimus) were used as control treatments, An additional phytoplankton treatment consisted of a mixture of A . tamarense (Nanhai strain) and P, donghaiense. Alexandrium species were found to have lethal effects on the brine shrimp at a density of 2000 cells/ml. All of the brine shrimps died within 24～168 hours of inoculation with the four treatments containing single toxic Alexandrium species. During the feeding experiment, toxic Alexandrium spp. inhibited feeding rates in all three stages of A. salina, while this response was not obvious in the non-toxic P. donghaiense treatment. The body surface of those brine shrimp fed Alexandrium species was consistently covered by a sticky floe. A. salina mortality was observed to increase with the occurrence of the floe. Toxicity of the paralytic shellfish poisoning( PSP) toxin produced by the Alexandrium species was not significantly-correlated with the survival or feeding rate of the brine shrimp. When mixed with P. donghaiense, the lethal effect of A. tamarense decreased as shown by an increase in the survival and feeding rate of the brine shrimp. A. salina metanauplii were found to be the life stage most sensitive to the toxic algae and hunger. In summary, toxic Alexandrium spp. Were found to have lethal effects on A. salina, and also to restrain the brine shrimp's feeding rate. Non-toxic Prorocentrum mitigated the toxicity of Alexandrium to a certain extent. The results also imply that the sticky material on the surface of the brine shrimp body may have been an important lethal factor, rather than the PSP toxins.
来源 生态学报 ,2006,26(12):3942-3947 【核心库】
关键词 亚历山大藻 ; 卤虫 ; 存活率 ; 摄食率 ; 东海原甲藻 ; PSP
地址

1. 国家海洋局第一海洋研究所, 海洋生态环境科学与工程国家海洋局重点实验室, 青岛, 266061  

2. 中国科学院海洋研究所, 青岛, 266071

语种 中文
文献类型 研究性论文
ISSN 1000-0933
基金 国家973计划
文献收藏号 CSCD:2624282

参考文献 共 22 共2页

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引证文献 3 篇

1 徐艳红 海洋卡盾藻对卤虫的急性毒性效应 暨南大学学报. 自然科学与医学版,2012,33(5):510-515
CSCD被引 2 次

2 吴霓 珠江口海域双胞旋沟藻赤潮对卤虫幼体、鱼苗和虾苗的急性毒性 水产学报,2013,37(9):1328-1333
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