INVESTIGADORES
ONDARZA Paola Mariana
congresos y reuniones científicas
Título:
Bioaccumulation of Persistent Organic Pollutants by chondrichthyan species in coastal waters of Southwest Atlantic: implications for conservation.
Autor/es:
CHIERICHETTI M.; SHIMABUKURO V.M.,; ONDARZA P.M.; LO NOSTRO F.; SCENNA L.; MIGLIORANZA K.S.B.
Lugar:
Nantes
Reunión:
Congreso; 26th Annual Meeting Society of Environmental Toxicology and Chemistry Europe: Environmental contaminants from land to sea: continuities and interface in environmental toxicology and chemistry; 2016
Institución organizadora:
Society of Environmental Toxicology and Chemistry Europe
Resumen:
Coastal marine ecosystems are amongst the most diverse and productive on the earth. However, they can function as sinks for diverse anthropogenic contaminants, such as the Persistent Organic Pollutants (POPs), which included organochlorine pesticides (OCPs) andpolychlorinated biphenyls (PCBs). Once released into the environment, POPs have the tendency to biomagnify in the food web, and consequently high trophic level organisms may accumulate high concentration in their tissues. Due to their relative longevity, moderateto large size, lipid-rich livers and high trophic position, chondrichthyans are able to accumulate significant concentrations of POPs. Buenos Aires Province (BAP) is one of the most economically important areas in Argentina, with an intensive agriculture production, commercial harbors and industries. In the coastal waters of this area (Southwest Atlanticbetween 34º and 41ºS), chondrichthyans are an important resource for artisanal, commercial and recreational fisheries. For that reason, levels and distribution of OCPs and PCBs were analyzed in liver, gonads and muscle of individuals of the cockfish Callorhinchus callorynchus (n=18), the smallnose fanskate Sympterygia bonapartii (n=6) and the rio skate Rioraja agassizii (n=6), captured in coastal waters of BAP. Concentrations were determined by GC-ECD. POPs levels (1.3?225.2 ng/g ww) in the tissues and organs of three species showed the following general tendency endosulfans>>PCBs>DDTs>HCHs and chlordanes, with the highest concentrations in livers. Females presented higher levels of these contaminants than males in the cockfish andsmallnose fanskate. Endosufans represented up to 75% of the total OCPs with a-/b-isomers ratios ?1 in the studied species, suggesting the technical mixture application for agricultural proposes, until their recently ban in Argentina. An enrichment of endosulfan sulfate levels was found in liver of both sexes of all species analyzed, suggesting thetransformation of the parent isomers in these chondrichthyans. The most abundant PCBs were tetra (#44, #52) and hexa (#149, #153)-chlorinated congeners. The pp´-DDE+ pp´-DDD/ pp´-DDT ratios.