Efectos de un hidrocarburo aromático policíclico (ß naftoflavona) sobre biomarcadores de efecto en Corydoras paleatus en condiciones de campo y laboratorio

  • P. I. Scarcia Programa de Ecofisiología Aplicada. Dpto. Ciencias Básicas, Universidad Nacional de Luján; CONICET
  • Fernando R. de la Torre Programa de Ecofisiología Aplicada. Dpto. Ciencias Básicas, Universidad Nacional de Luján; CONICET
Palabras clave: biomarcadores, Corydoras paleatus, ensayos de laboratorio, ensayos de campo, biomarkers, hidrocarburos aromáticos policíclicos, Polycyclic aromatic hydrocarbons

Resumen

Polycyclic aromatic hydrocarbons (PAHs) are important anthropogenic sources of aquatic contamination. In this study, hepatic biomarker responses of Corydoras paleatus injected with one sublethal dose of a PAH (ß-naftoflavona, BNF) were assessed under laboratory and field conditions. Glutathion-S-transferase (GST) and catalase (CAT) hepatic activities, liver protein content (PC), condition factor (CF) and liver somatic index (LSI) were determined. Two bioassays were performed during winter time: laboratory (la) and field (ca). Fish were injected with 50 mg BNF/kg body weight dissolved in corn oil (ß-la y ßca); control fish received corn oil (C-la y C-ca). There were no differences between controls or in BNF injected fish in the assessed parameters. BNF provoked a tendency of increase in CAT and GST activities and lower values of CP; on the other hand, no differences were observed in the FC and IHS. In BNF field exposed fish (ß-ca) CAT activity was significantly stimulated vs. both field and laboratory controls; GST differences were detected both between ß-ca and ß-la and their respective controls. BNF exposure induced adverse effects principally in the enzymatic biomarkers of C. paleatus and those effects were modulated by the environmental conditions

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Publicado
2019-03-14