Biomarker responses in caged sábalo (Prochilodus lineatus) exposed to untreated sewage effluent.

PEREZ RITA; BACCHETTA CARLA; ROSSI ANDREA; CAZENAVE JIMENA

Chascomús

Jornada; XVI Jornadas Anuales de la Sociedad Argentina de Biología; 2014

Sociedad Argentina de Biología

BIOMARKER RESPONSES IN CAGED SÁBALO (Prochilodus lineatus) EXPOSED TO UNTREATED SEWAGE EFFLUENT Pérez MR, Bacchetta C, Rossi A, Cazenave J Wastewater effluents are an important source of water pollution and fishes result vulnerable to them given that they are exposed throughout their lives. Oxidative stress-related parameters and putative biomarkers of brain damage were evaluated in caged juveniles P. lineatus exposed for 15 days in the Colastiné River, where untreated domestic wastewater from Santa Fe city is discharged. Fish were caged in different sites: upstream, immediately and downstream of effluent discharge. After 15 days, brain of caged fish exposed to the effluent showed a decrease in catalase and acetylcholinesterase activities, relative to up and downstream sites. Also, increased levels of caspase-3 activity were detected in the brain of fish caged at the effluent, which could indicate an induction of apoptosis due to effluent exposition. TBARS levels did not show a significant difference between caged fish at any of the sites, although high levels were detected in the liver of caged fish exposed immediately of effluent discharge point. Results suggest that exposition to sewage effluents could be potentially harmful to the fish brain.