Contenido de metales pesados en Cassostrea angulata, Dicentrarchus labrax y Mugil auratus de los estuarios de los ríos Guadalquivir y Barbate

Abstract

Heavy metal contents (Fe, Cu, Mn and Zn) of oyster (Crassostrea angulata), eurapean sea bass (Dicentrarchus labrax) and grey mullet (Mugil auratus) from Guadalquivir and Barbate estuaries were compared. Every comparison was made between species of the same range of weight. Edible tissue of oysters from the Guadalquivir estuary had average concentrations of Cu and Zn 5.5 and 2.2 times higher respectively than those from Barbate. Copper concentrations of oysters from Guadalquivir estuary were always higher than the recommended permissible concentration for human consumption (1.000 microg Cu/g d.w.). Livers of european sea bass from Guadalquivir estuary had mean Cu concentration 3.0 times higher than those from Barbate. Mean concentrations of Fe, Cu and Zn of grey mullet livers also were 1.7, 22.7 and 1.6 times higher respectively in specimens from Guadalquivir river. Concentrations for all metals is the two fish species studied were higher in livers than in dorsal muscle tissues. Copper accumulation in river of both sea bass and grey mullet were higher in specimens from Guadalquivir estuary.