Mercury and selenium in fish from the Savannah River: Species, trophic level, and locational differences
Mercury and selenium in fish from the Savannah River: Species, trophic level, and locational differences
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DOI：
10.1006/enrs.2001.4294
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发表时间：
2001-10-01
影响因子：
8.3
通讯作者：
Gochfeld, M
中科院分区：
文献类型：
--
作者：
Burger, J;Gaines, KF;Gochfeld, M
鱼类中的污染物水平相当令人感兴趣，因为这对鱼类本身以及消费它们的其他生物体都有潜在的影响。在这篇文章中，我们比较了11种来自萨凡纳河的鱼类肌肉组织中的汞水平，以及由于硒对汞毒性的已知保护作用而产生的硒水平。我们从这条河的三个河段采集了鱼的样本：能源部的萨凡纳河遗址的上游、沿线和下游，那里曾是核材料生产设施。我们测试了零假设，即鱼类组织中的汞和硒水平没有随着物种、营养水平和河流沿线位置的变化而变化。汞含量在种间存在显著差异，其中弓鳍鱼(Amia Calva)的汞含量最高，其次是大口黑鱼(Micropterus Salmoides)和水貂(Esox Niger)。太阳鱼(Lepomis spp.)汞含量最低。正如预期的那样，这些差异大体上反映了营养水平。汞水平几乎没有显著的位置差异，现有的差异也不大，推测反映了所检查地点之间的鱼的局部移动。硒和汞的浓度只与花鱼、花鱼和红胸太阳鱼呈正相关。汞含量与鱼体质量呈正相关，除美洲鳗(欧洲鳗)和太阳鱼(蓝鳍太阳鱼)外。萨凡纳河鱼类组织中的汞和硒含量与许多其他研究报告的汞和硒含量相似或更低，在大多数情况下，对鱼本身或其他水产消费者几乎不构成风险，尽管弓鳍和鲈鱼的含量足够高，对高级别消费者构成潜在威胁。(C)2001年学术出版社。
Levels of contaminants in fish are of considerable interest because of potential effects on the fish themselves, as well as on other organisms that consume them. In this article we compare the mercury levels in muscle tissue of 11 fish species from the Savannah River, as well as selenium levels because of its known protective effect against mercury toxicity. We sampled fish from three stretches of the river: upstream, along, and downstream the Department of Energy's Savannah River Site, a former nuclear material production facility. We test the null hypothesis that there were no differences in mercury and selenium levels in fish tissue as a function of species, trophic level, and location along the river. There were significant interspecific differences in mercury levels, with bowfin (Amia calva) having the highest levels, followed by largemouth bass (Micropterus salmoides) and pickerel (Esox niger). Sunfish (Lepomis spp.) had the lowest levels of mercury. As expected, these differences generally reflected trophic levels. There were few significant locational differences in mercury levels, and existing differences were not great, presumably reflecting local movements of fish between the sites examined. Selenium and mercury concentrations were positively correlated only for bass, perch (Perca flavescens), and red-breasted sunfish (Lepomis auritus). Mercury levels were positively correlated with body mass of the fish for all species except American eel (Anguilla rostrata) and bluegill sunfish (L. macrochirus). The mercury and selenium levels in fish tissue from the Savannah River are similar to or lower than those reported in many other studies, and in most cases pose little risk to the fish themselves or to other aquatic consumers, although levels in bowfin and bass are sufficiently high to pose a potential threat to high-level consumers. (C) 2001 Academic Press.