Nimet Jardel, Guimarães Ana Tereza Bittencourt, Delariva Rosilene Luciana
Centro de Ciências Biológicas e da Saúde, Programa de Pós-Graduação em Conservação e Manejo de Recursos Naturais, Universidade Estadual do Oeste do Paraná, Rua Universitária 2069, Caixa postal 711, Cascavel, Paraná, 85819-110, Brazil.
Bull Environ Contam Toxicol. 2017 Aug;99(2):232-238. doi: 10.1007/s00128-017-2111-9. Epub 2017 May 17.
Cholinesterase (ChE) activity was measured in Astyanax bifasciatus maintained in controlled conditions. Muscle ChE activity of individuals collected in field conditions in two seasons was compared among specimens collected in seven streams (forest and rural) of the lower Iguaçu river basin in association with physical, chemical, pesticides and biological factors. Significant differences in muscle ChE activity between control fish and fish collected in streams in both seasons were found, with higher activity in natural conditions. This the first time that differences in muscle ChE activity have been found among fish collected from different streams, suggesting synergism among multiple factors (e.g. temperature, pH, animal weight) and ecological attributes (richness and abundance) as influencing the variation in biomarkers. It is necessary to evaluate the quality of aquatic environments for a more accurate biomonitoring approach.
在可控条件下饲养的双线丽脂鲤中测量了胆碱酯酶（ChE）活性。将两个季节在野外条件下采集的个体的肌肉ChE活性，与在伊瓜苏河下游流域七条溪流（森林和乡村）采集的样本进行比较，并结合物理、化学、农药和生物因素进行分析。发现对照鱼与两个季节在溪流中采集的鱼的肌肉ChE活性存在显著差异，自然条件下的活性更高。这是首次在从不同溪流采集的鱼类中发现肌肉ChE活性存在差异，表明多种因素（如温度、pH值、动物体重）和生态属性（丰富度和丰度）之间存在协同作用，影响生物标志物的变化。有必要评估水生环境质量，以采用更准确的生物监测方法。
