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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Mercury accumulation in fishes from tropical aquatic ecosystems in the Niger Delta, Nigeria.
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Mercury accumulation in fishes from tropical aquatic ecosystems in the Niger Delta, Nigeria.

机译：尼日利亚尼日尔三角洲热带水生生态系统鱼类的汞蓄积。

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摘要

Fish are important biomarkers of trace elements in aquatic ecosystems, and are used to evaluate the status of water pollution by Hg in tropical aquatic ecosystems in Nigeria. Common fishes, Chrysichthys nigrodigitatus, Brycinus nurse, Hemichromis fasciatus, Lutianus ava, Oreochromis nilotica, Pomadasys jubelini, Stellifer stellifer and Tilapia guineensis were analysed for Hg accumulation using the cold vapour AAS technique. Results showed that Hg concn. in P. jubelini was highest, at 0.063 +or- 0.03 mg/kg. Other concn. values were 0.044 +or- 0.031 mg/kg for O. nilotica, 0.026 +or- 0.013 mg/kg for B. nurse, 0.034 +or- 0.034 mg/kg for H. fasciatus, 0.023 +or- 0.020 mg/kg for C. nigrodigitatus and 0.33 +or- 0.016 mg/kg for L. ava. Concn. of Hg accumulated by the fishes were low, within internationally accepted limits and unlikely to cause Hg poisoning. Because of the high Hg accumulating potential of P. jubelini, it is recommended as a biomarker for assessment of Hg toxicity in tropical aquatic environments.
机译：鱼是水生生态系统中微量元素的重要生物标志物，被用于评估尼日利亚热带水生生态系统中汞对水的污染状况。使用冷气原子吸收光谱法分析了常见鱼类，Chrysichthys nigrodigitatus，Brycinus护士，Hemichromis fasciatus，Lutianus ava，Oreochromis nilotica，Pomadasys jubelini，Stellifer stellifer和罗非鱼罗非鱼的汞积累。结果显示汞浓度。 Jubelini中的最高含量为0.063±0.03 mg / kg。其他内容尼罗罗非鱼（O. nilotica）的值为0.044 +或-0.031 mg / kg，B.护士的为0.026 +或-0.013 mg / kg，筋膜炎为0.034 +或-0.034 mg / kg，0.023 +或-0.020 mg / kg C.nigrodigitatus和L. ava的0.33±0.016 mg / kg。 Concn。鱼类积累的汞含量低，在国际公认的范围内，不太可能引起汞中毒。由于朱假单胞菌具有很高的汞累积潜力，因此建议将其作为评估热带水生环境中汞毒性的生物标记。

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