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首页> 外文期刊>Environmental Science & Technology >Dietary Selenium Reduces Retention of Methyl Mercury in Freshwater Fish
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Dietary Selenium Reduces Retention of Methyl Mercury in Freshwater Fish

机译:膳食硒减少了淡水鱼中甲基汞的保留

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摘要

Adverse effects from organic mercury transported along aquatic food chains are health issues in humans and other top predators. Methyl mercury in organisms at the lower food chain levels is eliminated slowly, and laboratory studies have not clarified the role of selenium in the retention of methyl mercury in fish. Here, we investigated the effects of dietary selenium on the retention of organic and inorganic mercury in freshwater fish. Addition of selenite to the food augmented elimination of methyl mercury (but not inorganic mercury) from goldfish Carassius auratus in a dose dependent manner; selenite caused methyl mercury to be lost from the general body rather than from any specific organ. Seleno-cystine and seleno-methionine (but not selenate) likewise promoted elimination of methyl mercury from goldfish. The threshold for the augmenting effect of selenite on die elimination of methyl mercury in the zebra fish Danio raw was 0.9S fig Se g~' food; higher concentrations reduced retention of methyl mercury in a dose dependent manner. Selenium concentrations in the food approaching natural background levels increase the elimination of methyl mercury from fish. Thus, selenium levels in a given aquatic food chain may affect mercury contamination along the food chain.
机译:沿水生食物链运输的有机汞的不利影响是人类和其他主要捕食者的健康问题。较低食物链水平的生物中的甲基汞被缓慢消除,并且实验室研究尚未阐明硒在鱼类中甲基汞保留中的作用。在这里,我们研究了膳食硒对淡水鱼中有机汞和无机汞的保留的影响。在食物中添加亚硒酸盐以剂量依赖的方式增强了金鱼Car鱼的甲基汞(而非无机汞)的消除;亚硒酸盐导致甲基汞从全身而不是任何特定器官中丢失。硒代胱氨酸和硒代蛋氨酸(但不是硒酸)同样促进了金鱼中甲基汞的消除。斑马鱼Danio生中亚硒酸盐对消除甲基汞的增强作用的阈值为0.9S无花果。较高的浓度以剂量依赖性方式减少了甲基汞的保留。食物中的硒浓度接近自然本底水平,可以消除鱼类中的甲基汞。因此,给定水生食物链中的硒含量可能会影响整个食物链中的汞污染。

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  • 来源
    《Environmental Science & Technology》 |2011年第22期|p.9793-9798|共6页
  • 作者单位

    Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark;

    Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark;

    Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark;

    Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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