Distribution of mercury in the tissues of five species of freshwater fish from Lake Mead, USA
Distribution of mercury in the tissues of five species of freshwater fish from Lake Mead, USA
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DOI：
10.1039/b307641p
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发表时间：
2003-09-01
影响因子：
--
通讯作者：
Pollard, J
中科院分区：
文献类型：
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作者：
Cizdziel, J;Hinners, T;Pollard, J
对采自美国米德湖的59条鲈鱼的7种组织（骨骼肌、肝脏、血液、性腺、脑、鳃和心脏）和69条大口黑鲈、76条癍点叉尾鱼、12条蓝鳃鱼和22条蓝罗非鱼的4种组织（肌肉、肝脏、血液和性腺）中的总汞（Hg）含量进行了测定。汞含量一般随营养水平和鱼的长度而增加。对于条纹鲈鱼，肝脏（531）中的平均汞含量（ng g（-1），湿重）最高，其次是肌肉（309）、心脏（186）、性腺（136）、脑（77）、鳃（52）和血液（36）。同样，鲶鱼和罗非鱼体内的汞含量为肝脏>肌肉>性腺>血液。相比之下，大口黑鲈和蓝鳃鱼在肌肉中的含量最高，其次是肝脏、性腺和血液。一般来说，汞水平之间的组织，特别是血液/肌肉和血液/肝脏强烈相关。随着汞的体内负荷增加，血液和器官中的浓度相对于肌肉中的浓度增加。肝脏的趋势最为明显。这些关系可以构成预测模型的基础，并表明血液和肌肉（栓）可能是有用的非致命措施的汞浓度和接触的鱼。对于条纹鲈鱼，汞含量升高的组织中也与消瘦的程度。肝脏与肌肉的比例与文献值相似，除了罗非鱼的平均比例为1.7，高于一般报道的非食鱼动物。最后，这项研究表明，固体采样方法在微量元素监测，特别是在体内分析，分析大量的样品和减少污染的风险的有用性。
Total mercury (Hg) concentrations were determined in seven tissues (skeletal muscle, liver, blood, gonad, brain, gill, and heart) of 59 striped bass and four tissues (muscle, liver, blood, and gonad) of 69 largemouth bass, 76 channel catfish, 12 bluegill, and 22 blue tilapia collected from Lake Mead, USA. Mercury levels generally increased according to trophic level and fish length. For striped bass, mean Hg levels (ng g(-1), wet mass) were highest in the liver (531), followed by muscle (309), heart (186), gonad (136), brain (77), gill (52), and blood (36). Similarly, Hg levels in the catfish and tilapia were liver > muscle > gonad > blood. In contrast, largemouth bass and bluegill had the highest levels in muscle, followed by liver, gonad, and blood. Generally, Hg levels were strongly correlated among the tissues, especially for blood/muscle and blood/liver. As the body burden of Hg increased, the concentration in blood and organs increased relative to the concentration in muscle. The trend was most pronounced for the liver. These relationships could form the basis of a predictive model and suggest that blood and muscle (plugs) could be useful for a non-lethal measure of Hg concentration and exposure in fish. For the striped bass, elevated Hg levels in the tissues were also correlated with degree of emaciation. Liver-to-muscle ratios were similar to literature values, except for tilapia with an average ratio of similar to1.7, which is higher than generally reported for non-piscivores. Finally, this study demonstrates the usefulness of a solid sampling approach in trace element monitoring, especially as pertaining to in vivo analysis, analysis of a large number of samples and reduction of contamination risk.