Cu2+和Cd2+对日本青鳉（Oryzias latipes）早期发育阶段的急性毒性效应研究

王洪盼; 赵艳民; 秦延文; 刘宪斌

Cu²⁺和Cd²⁺对日本青鳉（Oryzias latipes）早期发育阶段的急性毒性效应研究

1 天津科技大学, 天津市海洋资源与化学重点实验室;

2 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 国家环境保护河口与海岸带环境重点实验室

基金项目:

国家水体污染控制与治理科技重大专项(2012ZX7503)

Acute Toxicity Effects of Copper and Cadmium on the Early Developmental Stage of Oryzias latipes

1 Tianjin key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology;

2 State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences

Fund Project:

摘要: 为探究并比较淡水鱼种日本青鳉早期发育阶段对Cu²⁺和Cd²⁺等重金属胁迫的响应,在实验室通过半静态方式,对日本青鳉受精卵和仔稚鱼分别进行了48 h和96 h急性毒性实验。结果表明:Cu²⁺对日本青鳉胚胎24、48 h-LC₅₀分别为8.164 mg·L^-1和6.965 mg·L^-1;Cd²⁺对日本青鳉胚胎24、48 h-LC₅₀分别为63.084 mg·L^-1和53.093 mg·L^-1;较低浓度组Cu²⁺(≤ 1.97 mg·L^-1)时日本青鳉胚胎的发育速率快于对照组,而较高浓度组(≥ 3.87 mg·L^-1)胚胎的发育速率则慢于对照组;与Cu²⁺略有不同,无论浓度高低Cd²⁺对胚胎的孵化速率均产生抑制作用;Cu²⁺和Cd²⁺质量浓度分别高于1.97 mg·L^-1和19.68 mg·L^-1时,两种重金属离子均显著降低胚胎的孵化率(P<0.05)。Cu²⁺对日本青鳉初孵仔鱼24、48、72和96 h-LC₅₀分别为5.361 mg·L^-1、2.844 mg·L^-1、2.020 mg·L^-1和1.352 mg·L^-1;Cd²⁺对日本青鳉初孵仔鱼24、48、72和96 h-LC₅₀分别为15.907 mg·L^-1、10.550 mg·L^-1、7.986 mg·L^-1和6.346 mg·L^-1;Cu²⁺对日本青鳉稚鱼24、48、72和96 h-LC₅₀分别为5.732 mg·L^-1、4.037 mg·L^-1、2.498 mg·L^-1和1.955 mg·L^-1;Cd²⁺对日本青鳉稚鱼的24、48、72和96 h-LC₅₀分别为16.419 mg·L^-1、11.745 mg·L^-1、8.516 mg·L^-1和6.776 mg·L^-1。与其它淡水水生生物相比,日本青鳉仔稚鱼对铜和镉离子较为敏感。

Abstract: In order to explore and compare the toxicity responses of Oryzias latipes at its early developmental stage under the exposure of Cu²⁺ and Cd²⁺,static-renewal acute toxicity(48 h) on the embryo of Oryzias latipes and acute toxicity(96 h) on the fry and fingerling were investigated.The results showed that the 24 and 48 h-LC₅₀values were 8.164 and 6.965 mg-L^-1,respectively,for Cu²⁺-exposed embryos of Oryzias latipes;and were 63.084 and 53.093 mg·L^-1,respectively,for Cd²⁺-exposed embryos of Oryzias latipes.Embryo incubation time of Oryzias latipes was shortened in low Cu²⁺concentration(≤ 1.97 mg·L^-1)while was prolonged in high Cu²⁺concentration(≥ 3.87 mg·L^-1).In contrast,regardless of what the cadmium concentration was,all the embryo incubation time of Oryzias latipes exposed to Cd²⁺were prolonged significantly.Cu²⁺and Cd²⁺could decrease the hatchability of the embryos when the concentrations were higher than 1.97 mg·L^-1 and 19.68 mg·L^-1,respectively.The 24,48,72 and 96 h-LC₅₀ values for Oryzias latipes larvae exposed to Cu²⁺ were 5.361,2.844,2.020 and 1352 mg·L^-1,respectively;the 24,48,72 and 96 h-LC₅₀ values for Oryzias latipes larvae exposed to Cd²⁺ were 15.907,10.550,7.986 and 6.346 mg·L^-1,respectively;the 24,48,72 and 96 h-LC₅₀ values for Oryzias latipes fingerling exposed to Cu²⁺were 5.732,4.037,2.498 and 1.955 mg·L^-1,respectively;and the 24,48,72 and 96 h-LC₅₀ values for Oryzias latipes fingerling exposed to Cd²⁺ were 16.419,11.745,8.516 and 6.776 mg·L^-1,respectively.Compared with other freshwater aquatic organisms,the Oryzias latipes fry and fingerling were sensitive to copper and cadmium.

Key words:

Cu²⁺和Cd²⁺对日本青鳉（Oryzias latipes）早期发育阶段的急性毒性效应研究

1 天津科技大学, 天津市海洋资源与化学重点实验室;

2 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 国家环境保护河口与海岸带环境重点实验室

基金项目:

国家水体污染控制与治理科技重大专项(2012ZX7503)

关键词:

Acute Toxicity Effects of Copper and Cadmium on the Early Developmental Stage of Oryzias latipes

1 Tianjin key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology;

Fund Project:

Keywords:

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Cu²⁺和Cd²⁺对日本青鳉（Oryzias latipes）早期发育阶段的急性毒性效应研究

Acute Toxicity Effects of Copper and Cadmium on the Early Developmental Stage of Oryzias latipes

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Cu²⁺和Cd²⁺对日本青鳉（Oryzias latipes）早期发育阶段的急性毒性效应研究

English Abstract

Acute Toxicity Effects of Copper and Cadmium on the Early Developmental Stage of Oryzias latipes

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