Copaja S V, Muñoz G S, Nuñez V R, Pérez C, Vila I, Véliz D
Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.
Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.
Bull Environ Contam Toxicol. 2016 Jul;97(1):24-30. doi: 10.1007/s00128-016-1838-z. Epub 2016 May 26.
In order to determine the effect of a dam on metal concentrations in riverine fish species, we studied fish inhabiting the influent (Cachapoal River) and effluent (Rapel River) of the Rapel Reservoir in central Chile. Heavy metals were quantified in gills, liver and muscle of the catfish Trichomycterus areolatus and the silverside Basilichthys microlepidotus. Also, the bioaccumulation index (BAI) was estimated by considering heavy metal concentrations obtained from water and sediment. Results showed the presence of Al, Cu, Fe, Mn, Pb and Zn in the fish organs. The analysis showed high metal concentrations in catfish inhabiting the influent compared to those collected in the effluent. These results indicate a possible filter effect of the dam for most of the metals identified in the fish organs, because metal concentrations decreased in the effluent. Finally, catfish exhibited a larger BAI for most metals analyzed.
为了确定水坝对河流鱼类金属浓度的影响，我们研究了栖息在智利中部拉佩尔水库的进水口（卡查波阿尔河）和出水口（拉佩尔河）的鱼类。对鲶鱼 Trichomycterus areolatus 和银汉鱼 Basilichthys microlepidotus 的鳃、肝脏和肌肉中的重金属进行了定量分析。此外，通过考虑从水和沉积物中获得的重金属浓度来估算生物累积指数（BAI）。结果表明，鱼类器官中存在铝、铜、铁、锰、铅和锌。分析表明，与在出水口采集的鲶鱼相比，栖息在进水口的鲶鱼体内金属浓度较高。这些结果表明，水坝可能对鱼类器官中鉴定出的大多数金属具有过滤作用，因为出水口的金属浓度降低了。最后，鲶鱼对大多数分析的金属表现出更大的生物累积指数。
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