Arsenic species and their accumulation features in green turtles (Chelonia mydas)
Arsenic species and their accumulation features in green turtles (Chelonia mydas)
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DOI：
10.1016/j.marpolbul.2008.01.010
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发表时间：
2008-01-01
影响因子：
5.8
通讯作者：
Tanabe, Shinsuke
中科院分区：
文献类型：
--
作者：
Agusa, Tetsuro;Takagi, Kozue;Tanabe, Shinsuke
测定了绿色海龟（Chelonia mydas）肝脏、肾脏、肌肉和胃内容物中的总砷（As）及其化合物。肌肉中的总砷浓度高于肾脏和肝脏。砷甜菜碱（AB）是所有三个组织中的主要化合物，其水平与总砷浓度呈正相关。这表明AB对绿色龟体内As的积累有很大贡献。提取后的样品中剩余的砷浓度较高，在肝脏中检测到，这意味着脂溶性或蛋白质结合的砷化合物积累在肝脏的绿色龟。各组织中总砷含量与标准甲壳长呈显著负相关。绿色龟体内砷积累的大小依赖性可能与其在不同生长阶段由肉食性向草食性转变的食性有关。AB和二甲基砷酸（DMA）的浓度在胃内容物中低，但在组织中高，这意味着这些砷在绿色海龟的生物积累。(C)2008爱思唯尔有限公司保留所有权利。
Total arsenic (As) and its compounds were determined in liver, kidney, muscle, and stomach contents of green turtles (Chelonia mydas). Total As concentrations in the muscle were higher than those in the kidney and liver. Arsenobetaine (AB) was the predominant compound in all the three tissues and its levels were positively correlated with total As concentrations. This indicates that AB greatly contributes to As accumulation in green turtles. Higher concentrations of remaining As in the sample after extraction were detected in the liver, implying that lipid-soluble or protein bound As compounds accumulate in the liver of green turtles. Total As levels in tissues showed significant negative correlations with standard carapace length. The size-dependence of As accumulation in green turtles may be related to their feeding habit, shifting from carnivore to herbivore at different growth stages. Concentrations of AB and dimethylarsinic acid (DMA) were low in the stomach contents but high in the tissues, implying bioaccumulation of these arsenicals in green turtles. (C) 2008 Elsevier Ltd. All rights reserved.