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Comparison of Bioavailability and Biotransformation of Inorganic and Organic Arsenic to Two Marine Fish

机译：无机和有机砷对两种海水鱼类生物利用度和生物转化的比较

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摘要

Dietary uptake could be the primary route of arsenic (As) bioaccumulation in marine fish, but the bioavailability of inorganic and organic As remains elusive. In this study, we investigated the trophic transfer and bioavailability of As in herbivorous rabbitfish Siganus fuscescens and carnivorous seabass Lateolabrax japonicus. Rabbitfish were fed with one artificial diet or three macroalgae, whereas seabass were fed with one artificial diet, one polychaete, or two bivalves for 28 days. The six spiked fresh prey diets contained different proportions of inorganic As [As(Ⅲ) and As(Ⅴ)] and organic As compounds [methylarsenate (MMA), dimethylarsenate (DMA), and arsenobetaine (AsB)], and the spiked artificial diet mainly contained As(Ⅲ) or As(Ⅴ). We demonstrated that the trophic transfer factors (TTF) of As in both fish were negatively correlated with the concentrations of inorganic As in the diets, while there was no relationship between TTF and the AsB concentrations in the diets. Positive correlation was observed between the accumulated As concentrations and the AsB concentrations in both fish, suggesting that organic As compounds (AsB) were more trophically available than inorganic As. Furthermore, the biotransformation ability of seabass was higher than that in rabbitfish, which resulted in higher As accumulation in seabass than in rabbitfish. Our study demonstrated that different prey with different inorganic/organic As proportions resulted in diverse bioaccumulation of total As in different marine fish.
机译：膳食摄入可能是海水鱼类体内砷（As）生物积累的主要途径，但是无机和有机As的生物利用度仍然难以捉摸。在这项研究中，我们调查了As在草食性河豚Siganus fuscescens和食肉鲈鱼Lateolabrax japonicus中的营养转移和生物利用度。鱼饲喂一种人工饲料或三只大型藻类，而鲈鱼则饲喂一种人工饲料，一只多毛类或两只双壳类，为期28天。六种加标的新鲜猎物饮食中含有不同比例的无机砷[As（Ⅲ）和As（Ⅴ）]和有机As化合物[甲基砷酸（MMA），二甲基砷酸（DMA）和砷基甜菜碱（AsB）]，以及加标的人工饮食主要含有As（Ⅲ）或As（Ⅴ）。我们证明了两种鱼类中As的营养传递因子（TTF）与日粮中无机As的含量呈负相关，而日粮中TTF和AsB的含量之间没有关系。在两条鱼中，积累的砷浓度和砷中毒浓度之间观察到正相关，这表明有机砷化合物（AsB）比无机砷在营养上更容易获得。此外，鲈鱼的生物转化能力高于兔子鱼，这导致鲈鱼的砷积累量高于兔子鱼。我们的研究表明，具有不同无机/有机砷比例的猎物会导致不同海水鱼类中总砷的不同生物积累。

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  • 来源
    《Environmental Science & Technology》 |2016年第5期|2413-2423|共11页
  • 作者

    Wei Zhang; Wen-Xiong Wang; Li Zhang;

  • 作者单位

    Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;

    Division of Life Science, State Key Laboratory of Marine Pollution, Hong Kong University of Science and Technology (HKUST), Clearwater Bay, Kowloon, Hong Kong China;

    Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;

  • 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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