唐思;刘伟杰;段舜山;

• 1:暨南大学水生生物研究中心

摘要(Abstract)：

为探讨典型环境激素壬基酚(nonylphenol,NP)对枝角类浮游动物多刺裸腹溞连续世代的毒性效应,在实验室条件下,暴露连续3个世代(F0、F1、F2)多刺裸腹溞于0.02~0.10 mg·L-1的NP。15 d后测定成体死亡率、首胎繁殖时间、后代数目、成体蜕皮次数以及终点体长。研究结果表明,NP对F0代多刺裸腹溞具有很高的致死率;随着世代的增加,在相同NP质量浓度暴露下,与母代成体的死亡率相比,子代多刺裸腹溞成体的死亡率增高,致死毒性放大;NP对多刺裸腹溞连续3个世代的繁殖力都有显著抑制作用(P<0.05),并随着世代递增,NP对子代繁殖力的抑制增强;在NP暴露下,多刺裸腹溞F0首胎繁殖时间明显推迟,NP暴露浓度与延迟程度呈正相关,呈现出剂量-效应关系,首胎繁殖时间延迟的趋势也存在于F1、F2世代中且存在放大效应;但是连续3个世代多刺裸腹溞成体的蜕皮次数都不受NP暴露影响;F0和F1世代多刺裸腹溞终点体长降低,并呈现明显的剂量-效应关系,但与F1相比,F2低浓度处理组受试个体终点体长呈增加趋势。对结果进行分析,认为多刺裸腹溞在NP暴露后的母代DNA或DNA完整性遭到破坏导致子代在相同NP质量浓度暴露下更容易受到NP致死性的影响;NP化合物具有的苯酚结构抑制枝角类体内葡萄糖、硫酸盐与类固醇的结合,从而引起体内荷尔蒙水平异常,最终对诸如生殖等生理行为造成不利影响;多刺裸腹溞成体的蜕皮次数都不受NP暴露影响表明蜕皮激素系统未受到干扰,且NP对生长的影响显然存在蜕皮外的其他作用机制。

关键词(KeyWords)： 壬基酚;多刺裸腹溞;连续世代

Abstract:

Keywords:

基金项目(Foundation): NSFC-广东联合基金重点项目(U1133003);; 国家自然科学基金项目(41176104,41476099)

作者(Author): 唐思;刘伟杰;段舜山;

Email:

DOI:

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