| 不同水温条件下重金属对三角帆蚌幼蚌的急性致毒效应 |
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| 引用本文： | 毕蕾,纪文绣,唐金玉,付闰吉,何林,许正国.不同水温条件下重金属对三角帆蚌幼蚌的急性致毒效应[J].安徽农业科学,2009,37(14):6468-6471. |
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| 作者姓名： | 毕蕾 纪文绣 唐金玉 付闰吉 何林 许正国 |
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| 作者单位： | 上海海洋大学水产与生命学院,上海,201306;浙江大学动物科学学院,浙江杭州,310029;曲阜师范大学生命科学学院,山东曲阜,273165 |
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| 基金项目： | 浙江省重大科技专项项目（2007C12028）. |
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| 摘 要： | 目的]探索重金属在不同水温条件下对双壳贝类的毒性效应。方法] 采用静态急性毒性试验的方法研究了在21、25和29 ℃条件下水体中不同浓度的Hg^2＋、Cd^2＋、Zn^2＋ 对三角帆蚌幼蚌存活的影响。结果] 在3种水温条件下，3种重金属离子对三角帆蚌幼蚌的毒性大小依次为：Hg^2＋〉Cd^2＋〉Zn^2＋〉。水温在21、25和29 ℃条件下，3种重金属对三角帆蚌幼蚌的96 h半致死浓度（LC50）分别为：Hg^2＋分别是3.435 9、 0.129 2 和 0.108 7 mg/L；Cd^2＋分别是6.345 9、1.003 7 和0.387 9 mg/L；Zn^2＋分别是116.928 8、4.951 5 和 2.849 7 mg/L。当水温从21 ℃升至25 ℃时，Hg^2＋、Cd^2＋和Zn^2＋对幼蚌的毒性分别增强了26.6、6.3 和23.6倍；水温从25 ℃升至29 ℃时，Hg^2＋、Cd^2＋和Zn^2＋的毒性分别增强了1.2、2.6和1.7倍。结论] 水温是重金属急性毒性效应的影响因素，随着温度的升高，重金属的毒性逐渐增强。
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| 关 键 词： | 三角帆蚌 Hg2+ Cd2+ Zn2+ 急性毒性 温度 |
Acute Toxic Effects of Heavy Metal on the Juveniles of Hyriopsls cumingii under Different Water Temperatures |
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| Institution: | BI Lei et al (College of Aquatic and Life Science, Shanghai Ocean University, Shanghai 201306) |
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| Abstract: | Objective] The study aimed to explore the toxic effect of heavy metals on the mussel under different water temperature.Method] Effects of Hg2+,Cd2+ and Zn2+ with different concn.on the survival of Hyriopsis cumingii juveniles after exposure to individual metal were studied under water temperature of 21,25 and 29 ℃ by static acute toxicity test.Result] Under 3 kinds of water temperatures,the toxicant degree of 3 kinds of heavy metals to H.cumingii juveniles in order was Hg2+ >Cd2+ >Zn2+.Under water temperature of 21,25 and 29 ℃,the 96 h LC50 of the 3 kinds of heavy metal ions to H.cumingii juveniles were as follows: Hg2+ was 3.4359,0.129 2 and 0.108 7 mg/L resp.;Cd2+ was 6.3459,1.003 7 and 0.387 9 mg/L resp.;Zn2+ was 116.928 8,4.951 5 and 2.849 7 mg/L.The toxicity of Hg2+,Cd2+ and Zn2+ to the juveniles enhanced 26.6,6.3 and 23.6 times resp.when the water temperature rose from 21 ℃ to 25 ℃,while those enhanced 1.2,2.6 and 1.7 times resp.when the water temperature rose from 25 ℃ to 29 ℃.Conclusion] The temperature was an important factor to influence the acute toxicity of heavy metals.The toxicity of heavy metals was increasesed gradually as the water temperature rose. |
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| Keywords: | Hyriopsis cumingii Hg2+ Cd2+ Zn2+ Acute toxicity Temperature |
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