Evaluation of waterborne exposure to oil spill 5 years after an accident in Southern Brazil.
Ecotoxicol Environ Saf
; 72(2): 400-9, 2009 Feb.
Article
en En
| MEDLINE
| ID: mdl-18479748
ABSTRACT
Fish (Astyanax sp.) were exposed to water samples from the Arroio Saldanha, locality of an oil spill, and the Barigui River (upstream and downstream of the confluence of the river and Arroio Saldanha), Brazil. Histopathological and biochemical biomarkers, as acetylcholinesterase (AchE), ethoxyresorufin-O-deethylase (EROD), catalase (CAT), glutathione-S-transferase (GST) activities, lipid peroxidation (LPO) levels, and amounts of polynuclear aromatic hydrocarbon residues (PAHs) in bile were evaluated. PAHs, metals, and surfactants were investigated in the water samples. CAT and GST activities increased in the Arroio Saldanha sample, whereas CAT activity and LPO levels were increased in the upstream and downstream sites. The results suggested a toxic action of the free radicals and disturbance of the antioxidant defense mechanisms. However, the EROD and AchE activities were not affected. Histopathology studies showed severe lesions. The oil is still bioavailable to biota, moreover, other pollution sources continue to affect the water in the Barigui River.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Bioensayo
/
Aceites Combustibles
/
Accidentes
/
Monitoreo del Ambiente
/
Peces
Tipo de estudio:
Evaluation_studies
Límite:
Animals
País como asunto:
America do sul
/
Brasil
Idioma:
En
Año:
2009
Tipo del documento:
Article