Programa de Pós-Graduação Em Biodiversidade Animal, Universidade Federal de Santa Maria, Roraima Avenue, Santa Maria, RS, CEP 97105-900, Brazil.
Laboratório de Toxicologia Aquática (Labtaq), Universidade Federal de Santa Maria, Santa Maria, Brazil.
Bull Environ Contam Toxicol. 2020 May;104(5):575-581. doi: 10.1007/s00128-020-02821-0. Epub 2020 Mar 12.
Intensive agricultural and livestock activities demand high pesticide use and, consequently, contaminants reach aquatic ecosystems. In the lower Jacuí River, southern Brazil, there is a lack of knowledge about pesticide residues in water samples and the biochemical responses in native fish species. Thus, this study aimed to estimate the influence of pesticide residues and water parameters to biomarker responses in the native fish Astyanax spp. We performed seasonal biomonitoring in 2017 with water samples and fish collections. Biomarkers of oxidative stress, antioxidants, biotransformation, and neurotoxicity were analyzed in fish tissues. Fourteen pesticide residues were detected; they presented correlations with detoxification enzyme and oxidative stress biomarkers. These data indicate that most of variations can be related to the pesticide presence in water indicating high aquatic pollution in this place.
集约化农业和畜牧业活动需要大量使用农药，因此污染物会进入水生生态系统。在巴西南部的下雅库伊河，缺乏关于水中农药残留和本地鱼类物种生化反应的知识。因此，本研究旨在评估农药残留和水质参数对本地鱼类 Astyanax spp. 的生物标志物反应的影响。我们在 2017 年进行了季节性生物监测，采集了水样和鱼类样本。分析了鱼类组织中的氧化应激、抗氧化剂、生物转化和神经毒性的生物标志物。检测到 14 种农药残留，它们与解毒酶和氧化应激生物标志物相关。这些数据表明，大多数变化可能与水中农药的存在有关，表明该地区的水污染程度很高。
