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首页> 外文期刊>Environmental Science & Technology >A Model of Mercury Distribution in Tuna from the Western and Central Pacific Ocean: Influence of Physiology, Ecology and Environmental Factors
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A Model of Mercury Distribution in Tuna from the Western and Central Pacific Ocean: Influence of Physiology, Ecology and Environmental Factors

机译：西太平洋和中太平洋金枪鱼中汞分布的模型：生理，生态和环境因素的影响

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摘要

Information on ocean scale drivers of methylmercury levels and variability in tuna is scarce, yet crucial in the context of anthropogenic mercury (Hg) inputs and potential threats to human health. Here we assess Hg concentrations in three commercial tuna species (bigeye, yellowfin, and albacore, n = 1000) from the Western and Central Pacific Ocean (WCPO). Models were developed to map regional Hg variance and understand the main drivers. Mercury concentrations are enriched in southern latitudes (10 degrees S-20 degrees S) relative to the equator (0 degrees-10 degrees S) for each species, with bigeye exhibiting the strongest spatial gradients. Fish size is the primary factor explaining Hg variance but physical oceanography also contributes, with higher Hg concentrations in regions exhibiting deeper thermoclines. Tuna trophic position and oceanic primary productivity were of weaker importance. Predictive models perform well in the Central Equatorial Pacific and Hawaii, but underestimate Hg concentrations in the Eastern Pacific. A literature review from the global ocean indicates that size tends to govern tuna Hg concentrations, however regional information on vertical habitats, methylmercury production, and/or Hg inputs are needed to understand Hg distribution at a broader scale. Finally, this study establishes a geographical context of Hg levels to weigh the risks and benefits of tuna consumption in the WCPO.
机译：关于甲基汞含量和金枪鱼变异性的海洋尺度驱动因素的信息很少，但在人为汞（Hg）输入和对人类健康的潜在威胁的背景下至关重要。在这里，我们评估了来自中西部太平洋（WCPO）的三种商业金枪鱼物种（大眼金枪鱼，黄鳍金枪鱼和长鳍金枪鱼，n = 1000）中的汞浓度。开发了模型以绘制区域汞变化图并了解主要驱动因素。相对于每个物种的赤道（0度至10度南），南部纬度（10度至20度南）中的汞浓度富集，大眼斑表现出最强的空间梯度。鱼的大小是解释汞变化的主要因素，但物理海洋学也有贡献，在表现出较深温跃层的地区汞含量较高。金枪鱼的营养位置和海洋初级生产力的重要性较弱。预测模型在中赤道太平洋和夏威夷表现良好，但低估了东太平洋的汞浓度。来自全球海洋的文献综述表明，金枪鱼的汞含量往往由大小决定，但是，需要有关垂直生境，甲基汞生产和/或汞输入的区域信息，才能更广泛地了解汞的分布。最后，本研究建立了汞含量的地理环境，以权衡WCPO中金枪鱼食用的风险和收益。

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  • 来源
    《Environmental Science & Technology》 |2019年第3期|1422-1431|共10页
  • 作者

    Houssard Patrick; Point David; Tremblay-Boyer Laura; Allain Valerie; Pethybridge Heidi; Mashou Jeremy; Ferriss Bridget E.; Baya Pascale A.; Lagane Christelle; Menkes Christophe E.; Letourneur Yves; Lorrain Anne;

  • 作者单位

    CNRS, IFREMER, IRD, UBO,LEMAR,UMR 6539, BP A5, Noumea 98848, New Caledonia|Univ Nouvelle Caledonie, Inst ISEA, LabEx Corail, EA 7484, BP R4, Noumea 98851, New Caledonia;

    Univ Paul Sabatier Toulouse 3, CNRS, GET, Observ Midi Pyrenees,IRD 234,UMR 5563, 14 Ave Edouard Belin, F-31400 Toulouse, France;

    Ocean Fisheries Programme, Pacific Community, BP D5, Noumea 98848, New Caledonia;

    Ocean Fisheries Programme, Pacific Community, BP D5, Noumea 98848, New Caledonia;

    CSIRO Oceans & Atmosphere, GPO Box 1538, Hobart, Tas 2001, Australia;

    Univ Paul Sabatier Toulouse 3, CNRS, GET, Observ Midi Pyrenees,IRD 234,UMR 5563, 14 Ave Edouard Belin, F-31400 Toulouse, France;

    Natl Ocean & Atmospher Adm, Northwest Fisheries Sci Ctr, 2725 Montlake Blvd East, Seattle, WA 98112 USA;

    Univ Paul Sabatier Toulouse 3, CNRS, GET, Observ Midi Pyrenees,IRD 234,UMR 5563, 14 Ave Edouard Belin, F-31400 Toulouse, France;

    Univ Paul Sabatier Toulouse 3, CNRS, GET, Observ Midi Pyrenees,IRD 234,UMR 5563, 14 Ave Edouard Belin, F-31400 Toulouse, France;

    Univ Paris 06, CNRS, Sorbonne Univ, LOCEAN,IRD,UPMC,MNHN,UMR 7159, BP A5, Noumea 98848, New Caledonia;

    Univ Nouvelle Caledonie, Inst ISEA, LabEx Corail, EA 7484, BP R4, Noumea 98851, New Caledonia;

    CNRS, IFREMER, IRD, UBO,LEMAR,UMR 6539, BP A5, Noumea 98848, New Caledonia;

  • 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);
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