title: In situ assessment of the paraguay river water, in Brazilian Pantanal, by means of micronucleus assay with fish and chemical analysis.
abstract: The aim of this research was to assess water quality in a stretch of the Paraguay River within the Brazilian Pantanal by means of a micronucleus assay with fish, and by water and sediment physicochemical analysis. Significant increases (p >0.05) in the frequency of micronuclei (MN) and micronucleated cells (MNC) occurred in erythrocytes of Pimelodus maculatus and Leporinus friderici at two river sites in the town of Caceres relative to an upstream reference site. The results demonstrate that the Paraguay River water near Caceres has been receiving genotoxic effluents, which may be associated with the presence of chromium, sulfides, oil and grease, and/or other chemicals.
authors.affiliation: Institute of Natural and Technological Sciences, University of the State of Mato Grosso (UNEMAT), Nova Xavantina Campus, Br 158 km 635, Nova Xavantina, MT, 78690-000, Brazil.
authors.forename: Vânia Maria Sartini Dutra
authors.initials: VM
authors.lastname: Pimenta
authors.forename: Joaquim Manoel
authors.initials: JM
authors.lastname: da Silva
authors.forename: Júlio César
authors.initials: JC
authors.lastname: Nepomuceno
authors.forename: Luiz Alfredo
authors.initials: LA
authors.lastname: Pavanin
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001938:Brazil; D002397:Catfishes / Q000235:genetics*; D060125:Characiformes; D004912:Erythrocytes / Q000187:drug effects; D015162:Micronucleus Tests; D045483:Rivers / Q000737:chemistry*; D012621:Seasons; D013045:Species Specificity; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D060753:Water Quality
chemical_list: D014874:Water Pollutants, Chemical