a Programa de Pós-graduação em Zoologia Universidade Federal do Pará e Museu Paraense Emílio Goeldi/CZO , Belém , Brazil.
b I nstituto Evandro Chagas, Seção de Meio Ambiente , Laboratório de Toxicologia , Ananindeua , Brazil.
J Environ Sci Health B. 2018;53(12):810-816. doi: 10.1080/03601234.2018.1505077. Epub 2018 Sep 10.
Due to the toxicity and high environmental persistence of organochlorine pesticides in aquatic organisms, turtles have been studied as environment biomonitors. These animals are important sources of protein for the riverside and indigenous peoples of the Brazilian amazon. In the present study, organochlorine pesticide contamination was investigated in Podocnemis unifilis. Liver, muscle and fatty tissue samples were removed from 50 specimens collected from five sampling points located in the Xingu River basin. Fourteen organochlorine pesticides were analysed via gas chromatography with an electron capture detector (CG-ECD). Eight organochlorine pesticides were detected with average concentrations of ∑DDT, ∑Endossulfan and ∑HCH which were 26.17 ± 26.35, 14.38 ± 23.77 and 1.39 ± 8.46 ng g in moisture content, respectively. DDT compounds were the most predominant, with a greater concentration of pp'-DDT in the liver and pp'-DDD in the muscle. Significant differences were noted between the types of tissues studied, and the concentration of OCPs varied between sampling sites.
由于有机氯农药在水生生物体内具有毒性和高度的环境持久性，因此海龟已被研究作为环境生物监测器。这些动物是巴西亚马逊河两岸和土著人民重要的蛋白质来源。在本研究中，对美洲大鳄蜥（Podocnemis unifilis）中的有机氯农药污染进行了调查。从位于欣古河流域的五个采样点采集的 50 个样本中取出肝脏、肌肉和脂肪组织样本。使用带有电子捕获检测器的气相色谱法（CG-ECD）分析了 14 种有机氯农药。共检测到 8 种有机氯农药，∑DDT、∑硫丹和∑HCH 的平均浓度分别为 26.17±26.35、14.38±23.77 和 1.39±8.46ng/g（湿重）。DDT 化合物是最主要的，肝脏中 pp'-DDT 的浓度较高，肌肉中 pp'-DDD 的浓度较高。研究的组织类型之间存在显著差异，OCPs 的浓度在采样点之间也有所不同。
