Concerned with water quality, specialists have resorted to ecotoxicology as a tool to assess suspected contamination, enabling creation of strategies to repair the observed damage. Organisms such as fish and micro crustaceans are widely used in acute tests due to several characteristics in common among them including (1) accessibility of multiple samples, and (2) enhanced sensitivity when exposed to pollutants. Thus, the objective of this investigation was to determine the degree of toxicity at different points of a dam in Coromandel, Minas Gerais, using Artemia salina and Danio rerio as bioindicator organisms. Water was collected at three points of the dam were subsequently used to expose these organisms to different contaminant concentrations. Following exposure mortality and immobility rates were determined and compared to negative control (only distilled water). Results with exposure of A. salina did not present significant pollution affects. However, in the case of D. rerio the mortality frequency, immobility rate and behavioral alterations was increased at point P3; thus, D. rerio demonstrated greater sensitivity than A. salina. The physical-chemical test indicated that there were changes in parameters including biochemical demand of oxygen, dissolved oxygen and total dissolved solids (in sample at points 2 and 3), confirming toxic potential, and evidence of poor water quality at these locations. Therefore, data demonstrated that water from the dam at certain sites is not suitable for human consumption or leisure activities such as swimming that were previously reported to occur in this reservoir by the local community.

关于水质，专家们将生态毒理学作为评估可疑污染的工具，从而制定了修复观察到的损害的策略。鱼和微型甲壳类等生物由于其共有的几个特征而广泛用于急性试验中，这些特征包括：（1）可访问多个样品；（2）暴露于污染物时灵敏度提高。因此，本次调查的目的是使用卤虫和盐生达尼奥来确定米纳斯吉拉斯州科罗曼德大坝不同部位的毒性程度。作为生物指示生物。在大坝的三个点收集水，随后将这些生物暴露于不同的污染物浓度。接触后确定死亡率和固定率，并与阴性对照（仅蒸馏水）比较。盐假单胞菌暴露的结果未显示出明显的污染影响。但是，对于D. rerio，在P3点死亡率增加，动不动率和行为改变增加。因此，D。rerio表现出比A. salina更高的敏感性。物理化学测试表明，参数发生了变化，包括对氧气，溶解氧和总溶解固体的生化需求（在第2点和第3点的样品中），证实了潜在的毒性以及这些位置水质差的证据。因此，数据表明，某些地点的水坝水不适合人类消费或休闲活动，例如游泳，此前当地社区曾报道在该水库中发生这种活动。