| 汞和硒对剑尾鱼的急性毒性及其安全浓度评价 |
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| 引用本文： | 王春凤,方展强.汞和硒对剑尾鱼的急性毒性及其安全浓度评价[J].环境科学与技术,2005,28(2):32-34. |
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| 作者姓名： | 王春凤 方展强 |
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| 作者单位： | 华南师范大学生命科学学院,广州,510631 |
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| 基金项目： | 广东省科委科技攻关项目资助(2KB05402N) |
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| 摘 要： | 用重金属汞(Hg+2) 和硒(Se+4) 对剑尾鱼(Xiphophorus helleri)进行急性毒性和联合毒性的实验。其目的在于评价水环境中Hg+2和Se+4对鱼类的影响,为制订渔业水质标准提供参考数据。结果表明:Hg+2对剑尾鱼的 24、48、96 h的 LC50分别为 1.71、1.35、0.84mg/L;Se+4对剑尾鱼24、48、96 h的Lc50分别为17.91、12.59、6.64 mg/L;在浓度和毒性比都为1∶1的条件下,24 h都表现联合作用,而48 h、96 h则为拮抗作用。剑尾鱼对Hg和Se的最大容许浓度分别为:0.0084和0.064 mg/L。结果还表明:剑尾鱼幼体对Hg和Se敏感,是一种较理想的环境污染指示生物。
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| 关 键 词： | 剑尾鱼 汞 硒 联合毒性 评价 |
| 文章编号： | 1003-6504(2005)02-0032-03 |
| 修稿时间： | 2003年10月28 |
Evaluation on Acute Toxicity and Safety Concentration of Mercury and Selenium to Swordtail Fish, Xiphophorus helleri |
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| WANG Chun-feng,FANG Zhan-qiang.Evaluation on Acute Toxicity and Safety Concentration of Mercury and Selenium to Swordtail Fish, Xiphophorus helleri[J].Environmental Science and Technology,2005,28(2):32-34. |
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| Authors: | WANG Chun-feng FANG Zhan-qiang |
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| Abstract: | The acute and joint toxicity test to swordtail fish, Xiphophorus helleri was conducted to evaluate the impact of mercury and selenium on fishes. Results showed LC_(50) of divalent mercury to swordtail fish were 0.84, 1.35, 1.71mg/L in 24h, 48h and 96h respectively, while LC_(50) of tetravalent selenium to swordtail fish were 6.64, 12.59, 17.91mg/L respectively. The joint toxicity of two toxicants to swordtail fish was synergistic in 24h and antagonistic in 48h and 96h, both were treated as ratio 1∶1 of toxicity and concentration. The maximum permissible limit of concentration (MPC) Hg and Se was 0.0084 and 0.064mg/L respectively. |
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| Keywords: | Xiphophorus helleri mercury selenium acute toxicity evaluation |
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