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研究代谢参数作为污染的非特异性生物标志物的潜在用途。Igarapédo Quarenta是一条小型的城市河流，横穿亚马逊马瑙斯市的一个工业区，无需处理即可接收城市废水。鱼tambaqui（巨像））暴露于从该拉伸的两个不同部位收集的水中96小时。暴露后，测量常规代谢率（RMR），对鱼进行安乐死以测量电子传输系统（ETS）活性，铜（Cu）和镉（Cd）的生物蓄积量和胆汁PAHs。采样点中的水显示出低氧和高pH，电导率，溶解离子，Cu，Cd和氨。PAHs的胆汁浓度很高，表明工业污染。暴露于来自Igarapédo Quarenta的水中的tambaqui表现出RMR升高和ETS / RMR降低，表明代谢鱼类性能受损，并且可能将这些参数用作生物标记物。