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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Evaluation of acute copper toxicity during early life stages of gilthead seabream, Sparus aurata
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Evaluation of acute copper toxicity during early life stages of gilthead seabream, Sparus aurata

机译：评估金头鲷（Sparus aurata）早期生命阶段的急性铜毒性

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In this study, the effects of exposure to copper (mortality and morphological alterations) on the early life stages of the gilthead seabream, Sparus aurata, were examined. Eggs/embryos and larvae were exposed to nominal concentrations of copper ranging from 0.0001 to 10 mg/L Cu (II) in the tests with eggs/embryos and 0.025 to 0.5 mg/L Cu (II) in the test with larvae. Duration of the assays was 48 hours for embryos and 96 hours for larvae. A high percentage of mortality was observed in embryos exposed to 0.1 mg/L (97.2%) and in larvae exposed to 0.5 mg/L (100%). The embryos proved the most sensitive to copper for the same duration of exposure. The acute toxicity expressed as LC_(50) 48 hours was 0.054 (0.048-0.058) mg/L for embryos and 0.261 (0.182- 0.375) mg/L for larvae. Morphological alterations or abnormalities in embryos included irregular shapes of chorion, opacity and vitellus retraction/degeneration. In larvae we observed poor capacity to swim, trembling, myoskeletal defects, opacity and exophthalmia. Histopathological alterations are observed in S. aurata larvae. Mucous cells of the digestive tissue present a severe alteration with an increment of exudates. A great cellular disorganization in the renal tissue is observed. Results from this work indicate the high sensitivity of early life stages of Sparus aurata to copper (II) and the persistence of sublethal effects.
机译：在这项研究中，研究了暴露于铜（死亡率和形态变化）对银头鲷（Sparus aurata）早期生命阶段的影响。在使用鸡蛋/胚的测试中，将鸡蛋/胚胎和幼虫暴露于名义浓度为0.0001至10 mg / L的铜（II），对于使用幼虫的测试，将其暴露在0.025至0.5 mg / L铜（II）中。胚胎的测定时间为48小时，幼虫的测定时间为96小时。暴露于0.1 mg / L（97.2％）的胚胎和暴露于0.5 mg / L（100％）的幼虫的死亡率很高。事实证明，在相同的暴露时间内，胚胎对铜最敏感。表示为LC_（50）48小时的急性毒性对于胚胎是0.054（0.048-0.058）mg / L，对于幼虫是0.261（0.182-0.375）mg / L。胚胎的形态学改变或异常包括绒毛膜的不规则形状，不透明和黄斑缩回/变性。在幼虫中，我们观察到游泳，发抖，骨骼肌缺损，不透明和眼球突出的能力较弱。在金黄色葡萄球菌幼虫中观察到组织病理学改变。消化组织的粘液细胞出现严重改变，渗出物增多。在肾组织中观察到很大的细胞混乱。这项工作的结果表明，金头鲷的早期生命期对铜（II）的敏感性高，并且具有亚致死作用。

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