Differential uptake of endosulfan in embryo-larval development of the amphibian Rhinella arenarum under sublethal exposure

GABRIELA SVARTZ; DAMIAN J.G. MARINO; ALICIA RONCO; CRISTINA PÉREZ-COLL

ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY

SPRINGER

Lugar: Berlin; Año: 2015 vol. 69 p. 104 - 111

0090-4341

Agroecosystems are usually polluted with a wide variety of contaminants, with pesticides being very frequently detected. Endosulfan, an organochlorine pesticide, has been shown to cause both lethal and sublethal effects on aquatic organisms such as amphibians and especially on its early developmental stages. In this context, the aim of this study was to evaluate the uptake of environmentally relevant concentrations of endosulfan and its correlation with differential sensitivity in the early development stages of the common South American toad, Rhinella arenarum. Embryos and larvae were exposed to sublethal concentrations of endosulfan for several periods of exposures. According to the developmental stage at which they were exposed, the uptake rate was different. Bioconcentration Factors (BCFs) for embryos significantly decreased with exposure time and concentration (p