The occurrence of chemical elements and POPs in loggerhead turtles (Caretta caretta): An overview

Chemical elements and persistent organic pollutants (POPs) are globally present in aquatic systems and their potential transfer to loggerhead marine turtles (Caretta caretta) has become a serious threat for their health status. The environmental fate of these xenobiotics may be traced by the analysis of turtles' tissues and blood. Generally, loggerhead turtles exhibited a higher metal load than other turtle species, this could be explained by differences in diet habits being food the main source of exposure. Literature shows that muscle, liver and kidney are most considered for the quantification of chemical elements, while, organic compounds are typically investigated in liver and fat.This paper is an overview of the international studies carried out on the quantification of chemical elements, polychlorinated biphenyls (PCBs), organochlorines (OCs) and perfluorinated compounds (PFCs), in tissues, organs and fluids of C. caretta from the Mediterranean Sea, the Atlantic and the Pacific Oceans.

► Elements and persistent organic pollutants are present in aquatic systems worldwide. ► Loggerhead turtle Caretta caretta is in Red List of threatened species of the IUCN. ► This is a review on the internationally available literature in turtles samples. ► Levels of contaminants in organs, tissues and fluids are reported and discussed.