徐风风;朱丽岩;巩文静;王俊健;卢梦雪;

• 1:中国海洋大学海洋生命学院
• 2:山东省青岛实验初级中学

摘要(Abstract)：

为了研究四溴联苯醚(BDE-47)对海洋桡足类的毒性效应,以太平洋真宽水蚤和日本虎斑猛水蚤为受试生物,依据急性毒性实验96 h-LC50值,设置5个浓度组和1个对照组,测定摄食率、滤水率、耗氧率、排氨率和抗氧化防御系统中SOD、GST、GPx活性以及GSH含量。结果显示:BDE-47对太平洋真宽水蚤和日本虎斑猛水蚤的96 h-LC50分别为57和851μg·L-1,后者明显高于前者。2种桡足类在BDE-47作用下,其能量摄入和代谢均受到不同程度的诱导或抑制。太平洋真宽水蚤在中浓度(1.425μg·L-1)下摄食率和排氨率受到促进,高浓度(5.70和11.40μg·L-1)下耗氧率明显抑制;日本虎斑猛水蚤高浓度下(170.20μg·L-1)摄食率受到抑制,中浓度(21.28μg·L-1)下耗氧率受到促进,各个浓度的BDE-47对其排氨率均有明显促进作用。太平洋真宽水蚤SOD活性在BDE-47暴露96 h过程中均低于对照组(P<0.05),受到明显抑制;GST活性随暴露时间延长先升高后降低;GSH含量和GPx活性低浓度(0.7125和1.425μg·L-1)下随时间先升高后降低,而高浓度(5.70和11.40μg·L-1)下则相反。日本虎斑猛水蚤SOD活性随BDE-47浓度的升高先降低后升高再降低;GST活性和GSH含量在低浓度(10.64和21.28μg·L-1)BDE-47中与对照组相比无显著差异(P>0.05),而高浓度(85.10和170.20μg·L-1)BDE-47下,GST活性随时间先升高后降低,GSH含量则先降低后升高再降低;GPx活性呈现先降低后升高趋势。由此可见,BDE-47与这2种桡足类的能量摄入、代谢和抗氧化防御系统存在一定时间及剂量效应,并具有明显的物种差异性。

关键词(KeyWords)： BDE-47;太平洋真宽水蚤;日本虎斑猛水蚤;摄食;代谢;抗氧化防御系统

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(31172412);; 海洋公益性行业科研专项经费(201105013-3)

作者(Author): 徐风风;朱丽岩;巩文静;王俊健;卢梦雪;

Email:

DOI:

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