六溴环十二烷对拟长腹剑水蚤的急性毒性和生殖发育毒性效应  

Toxic Effects of HBCD on the Acute Toxicity,Development and Reproduction of Oithonasimiles

作　　者：王晓敏[1] 朱丽岩[1] 陈学超[1] 江田田[1] 

机构地区：[1]中国海洋大学海洋生命学院,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2017年第1期82-88,共7页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(31172412;31572621)资助~~

摘　　要：为探讨六溴环十二烷(Hexabromocyclododecane,HBCD)对海洋桡足类的毒性效应,本文研究了HBCD对拟长腹剑水蚤(Oithona similis)急性毒性、变态率、变态时间、成熟时间及繁殖力的影响。结果显示:HBCD对拟长腹剑水蚤的96h-LC50为1.75mg·L-1;不同浓度HBCD暴露下拟长腹剑水蚤的变态率、变态时间、首次抱卵时间、卵囊发育时间及抱卵雌体比率均受到显著影响;各浓度HBCD对拟长腹剑水蚤的生殖力未造成显著影响。研究表明,HBCD对拟长腹剑水蚤的急性毒性相对较低,但对其生殖发育具有显著的毒性效应,这可为HBCD的潜在生态风险评估提供一定的科学依据。HBCD is a type of brominated flame retardants which is widely used.At the same time,it is a kind of persistent organic pollutants with highly biological accumulated toxicity.It can accumulate,migrate and transformate in the environment for a long time,and now it has become a kind of widespread pollutant.To explore the toxic effects of Hexabromocyclododecane（HBCD）on marine copepods,this research studyed the effects of HBCD exposure on the acute toxicity,metamorphosis rate,metamorphosis time,maturation time and fecundity of Oithona similis.Acute toxicity determined the mortality rate directly.Metamorphosis rate,metamorphosis time and maturation time are normally known that reveal the propagation rate of species.The results showed that 96h-LC50 of HBCD to O.similis was 1.752mg·L-1;The time required for metamorphosis,first spawning and oocyst development,the metamorphosis rate and the percentage of gravid females were affected significantly by HBCD;Different concentrations of HBCD did not cause a significant impact on the fecundity.Studies revealed that the acute toxic effect of HBCD was relatively low,but it showed a significant toxicity on the reproduction and development of O.similis which means long term toxicity exist on this organism.HBCD can cause the reduce of copepods and accumulate in predator like salmon,tuna,jellyfish,maybe humans are harmed after the long term accumulation.This could provide a scientific basis for assessing the potential ecological risks caused by HBCD.

关 键 词：六溴环十二烷 拟长腹剑水蚤 急性毒性作用 发育 繁殖 

分 类 号：Q142.9[生物学—生态学]