Acute and chronic effects of DDT on Pseudodiaptomus poplesia.
Acute and chronic effects of DDT on Pseudodiaptomus poplesia.
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发表时间：
2012
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通讯作者：
Liu Guangxing
中科院分区：
文献类型：
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作者：
Liu Guangxing
为探讨内分泌干扰物之一的滴滴涕对海洋桡足类的生物学效应，本文研究了滴滴涕对白杨拟镖水蚤的急性毒性和亚致死效应，并测量了白杨拟镖水蚤在3.5、35、45、50、60、70、80、100、L-1和350 ng·L-1的DDT处理，48 h和96 h的LC 50分别为6.75 μg·L-1和3.53 μg·L-1。结果表明，DDT对中国近海桡足类的性比和体长均无显著影响，并结合国内外有关有机氯农药污染的文献，推测DDT对中国近海桡足类具有较高的生态风险。
To investigate the biological effects of DDT,one of the endocrine disrupting chemicals,on marine copepods,this paper studied the acute toxicity and sub-lethal effect of DDT on Pseudodiaptomus poplesia,and measured the metamorphosis,survival,fecundity,sex ratio,and body length of P.poplesia exposed to 3.5,35,and 350 ng·L-1 of DDT.The 48 h LC50 and 96 h LC50 were 6.75 μg·L-1 and 3.53 μg·L-1,respectively.When exposed to each concentration DDT,the P.poplesia showed a reduced metamorphosis rate in the first generation.At 350 ng·L-1 of DDT,the survival,egg production,and the percentage of gravid females all reduced.No significant effects were observed in the sex ratio and body length of P.poplesia exposed to each concentration DDT.Based on these results and the literatures about nearshore water body organochlorine pesticides pollution,it was deduced that DDT could cause high ecological risk to nearshore copepods.