title: Water quality assessment of the Tubarão River through chemical analysis and biomarkers in the Neotropical fish Geophagus brasiliensis.
abstract: The Tubarão River rises in Santa Catarina, Brazil, and has been historically affected by coal mining activities around its springhead. To evaluate its water conditions, an investigation regarding a possible decontamination gradient associated with the increased river flow toward the estuary, as well as the influence of seasonality over this gradient was performed through a series of biomarkers (vitellogenin, comet assay, lipid peroxidation, protein carbonylation, gluthatione, gluthatione S-transferase, acetylcholinesterase, light microscopy in liver, and scanning electron microscopy in gills) and chemical analysis (polycyclic aromatic hydrocarbons (PAHs) in bile and metal analysis in sediment) in the cichlid Geophagus brasiliensis. Two collections (summer and winter) were made in four distinct sites along the river, while sediments were sampled between those seasons. As expected, the contamination linked exclusively to mining activities was not observed, possibly due to punctual inputs of contaminants. The decontamination gradient was not observed, although seasonality seemed to have a critical role in the responses of biomarkers and availability of contaminants. In the summer, the fish presented higher histopathological damages and lower concentrations of PAHs, while in the winter they showed both higher genetic damage and accumulation of PAHs. The Tubarão suffers impacts from diverse activities, representing health risks for wild and human populations.
authors: Ecology and Conservation, Federal University of Paraná, P.O. Box 19031, CEP 81531-990, Curitiba, PR, Brazil, flaviohto@gmail.com.
authors: Flávio Henrique Tincani
authors: FH
authors: Osório
authors: Luis Felipe Oliveira
authors: LF
authors: Silva
authors: Laercio Dante Stein
authors: LD
authors: Piancini
authors: Ana Carolina Barni
authors: AC
authors: Azevedo
authors: Samuel
authors: S
authors: Liebel
authors: Flavia Yoshie
authors: FY
authors: Yamamoto
authors: Vivian Prá
authors: VP
authors: Philippi
authors: Marcos Leandro Silva
authors: ML
authors: Oliveira
authors: Claudia Feijó
authors: CF
authors: Ortolani-Machado
authors: Francisco
authors: F
authors: Filipak Neto
authors: Marta Margarete
authors: MM
authors: Cestari
authors: Helena Cristina
authors: HC
authors: da Silva de Assis
authors: Ciro Alberto
authors: CA
authors: de Oliveira Ribeiro
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis*; D001938:Brazil; D023681:Cichlids / Q000254:growth & development / Q000378:metabolism*; D004784:Environmental Monitoring / Q000379:methods*; D063366:Estuaries; D019015:Geologic Sediments / Q000032:analysis; D005880:Gills / Q000737:chemistry / Q000378:metabolism; D006801:Humans; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000378:metabolism; D045483:Rivers / Q000737:chemistry*; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D060753:Water Quality
chemical_list: D015415:Biomarkers; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical
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