Brazilian National Institute for Research of the Amazon, Manaus, AM, Brazil.
Acaraú Valley State University, Sobral, CE, Brazil.
Bull Environ Contam Toxicol. 2020 Dec;105(6):853-859. doi: 10.1007/s00128-020-03041-2. Epub 2020 Nov 17.
The main purpose of the present study was to investigate the potential use of metabolic parameters as non-specific biomarkers of pollution. The Igarapé do Quarenta is a small urban river crossing an industrial area in the city of Manaus, Amazon, and receives the city wastewater without treatment. The fish tambaqui (Colossoma macropomum) were exposed to water collected from two different sites of that stretch for 96 h. After exposure, routine metabolic rate (RMR) was measured, and fish were euthanized for measurements of electron transport system (ETS) activity, Copper (Cu) and Cadmium (Cd) bioaccumulation and biliary PAHs. Water in the sampling points presented low oxygen and high pH, conductivity, dissolved ions, Cu, Cd and ammonia. Bile concentrations of PAHs were high suggesting industrial pollution. The tambaqui exposed to water from Igarapé do Quarenta showed increased RMR and decreased ETS/RMR suggesting impairment of metabolic fish performance and the potential use of these parameters as biomarkers.
本研究的主要目的是探讨代谢参数作为污染非特异性生物标志物的潜在用途。伊加拉佩河是一条穿过亚马逊州玛瑙斯市工业区的小河，城市废水未经处理就排入其中。坦巴圭鱼（Colossoma macropomum）在该河段的两个不同地点采集的水中暴露 96 小时。暴露后，测量常规代谢率（RMR），然后处死鱼以测量电子传递系统（ETS）活性、铜（Cu）和镉（Cd）的生物积累以及胆汁中的多环芳烃。采样点的水呈现低氧和高 pH 值、电导率、溶解离子、Cu、Cd 和氨。胆汁中多环芳烃浓度高表明存在工业污染。暴露于伊加拉佩河水中的坦巴圭鱼表现出 RMR 增加和 ETS/RMR 降低，这表明鱼类代谢性能受损，这些参数有作为生物标志物的潜力。
