封闭群稀有鮈鲫对几种常见化学品的敏感性
Sensitivity of rare minnow (Gobiocypris rarus, IHB) to several common chemicals
查看参考文献27篇
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文摘
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采用96h急性毒性试验检测了稀有鮈鲫封闭群和野生群对重铬酸钾、五氯酚、氯化汞、对氯苯胺、氯化镉等几种常见化学品的敏感性差异,并通过7d 亚慢性毒性试验以及胚胎-卵黄囊吸收阶段毒性试验检测了对氯苯胺、氯化镉对稀有鮈鲫封闭群的亚慢性毒性.急性毒性试验结果表明,Cr~(6+)、五氯酚、Hg~(2+)、对氯苯胺和Cd~(2+)对稀有鮈鲫封闭群的96h LC50分别为69.0mg/L,111.4,56.9μg/L,35.5,12.2mg/L;Cr~(6+)对封闭群的96h LC50低于野生群(99.8mg/L)(P<0.05),Hg~(2+)和PCP对封闭群96h LC50与野生群(65.8,105.6μg/L)无显著差异(P>0.05).胚胎-卵黄囊吸收阶段和7d 亚慢性毒性测试结果表明,Cd~(2+)和对氯苯胺暴露后封闭群在孵化率、畸形率、死亡率、生长等方面均表现出毒性效应,其中生长指标更为敏感.以生长为观测指标,2种试验的结果无显著差异,对Cd~(2+)的NOEC均为0.1mg/L,胚胎-卵黄囊吸收阶段试验中对氯苯胺的NOEC为2mg/L,7d亚慢性毒性试验中对氯苯胺的NOEC为4mg/L.本研究证明了稀有鮈鲫封闭群对化学药品的敏感性高,可作为化学品生态毒理学测试的种源. |
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其他语种文摘
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We performed waterborne exposures of several chemicals on adult and embryo-larvae stage rare minnow and compared the sensitivity between the wild group (WG) and closed colony (IHB). Adult rare minnows were acutely exposed to lethal concentrations of the chemical agents (K_2Cr_2O_4, pentachlorophenol, HgCl_2, p-Chloroaniline and CdCl_2) in order to determine the 96 h LC50 (96 h lethal median concentration). For the closed colony, the 96h LC50was 69.0mg/L, 111.4, 56.9 μg/L, 35.5and12.2mg/L for Cr~(6+), pentachlorophenol, Hg~(2+), p-Chloroaniline and Cd~(2+), respectively. For the wild colony, the 96h LC50was 99.8mg/L, 105.6and 65.8 μg/L for Cr~(6+), pentachlorophenol, Hg~(2+), respectively. A significant difference was observed in the exposure to K_2Cr_2O_4between the two colonies (P<0.05). Then the embryos (8hours post-fertilization) and larvae (1day post-hatching) from closed colony were exposed to p-Chloroaniline and CdCl_2 for 7days and the exposure caused toxic effects on hatching, malformation, survival and growth, and among these, growth was the most sensitive parameter to the toxicants stress. For p-Chloroaniline, the obtained none-observable effect concentration (NOEC) for growth were 2and 4mg/L in the embryos and larvae, respectively; while for CdCl_2, the NOEC was 0.1mg/L in both the embryos and larvae. Our results suggested that the closed colony rare minnow is sensitive to chemical exposure and can serve as a reliable model organism for testing chemical toxicity. |
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来源
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中国环境科学
,2014,34(4):1059-1066 【核心库】
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关键词
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稀有鮈鲫
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封闭群
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急性毒性测试
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亚慢性毒性测试
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地址
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中国科学院水生生物研究所, 湖北, 武汉, 430072
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6923 |
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学科
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环境污染及其防治 |
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基金
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国家水体污染控制与治理科技重大专项
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国家自然科学基金
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文献收藏号
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CSCD:5124347
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