Uptake, tissue distribution and metabolism of the insecticide endosulfan in Jenynsia multidentata (Anablepidae, Cyprinodontiformes)Uptake, tissue distribution and metabolism of the insecticide endosulfan in Jenynsia multidentata (Anablepidae, Cyprinodonti

BALLESTEROS, M.L; GONZÁLEZ, M.; WUNDERLIN, D.A; BISTONI, M.A; MIGLIORANZA, K.S.B.

ENVIRONMENTAL POLLUTION

ELSEVIER SCI LTD

Lugar: Londres; Año: 2011 vol. 159 p. 1709 - 1714

0269-7491

The study reports the accumulation, distribution and metabolism of technical endosulfan in Jenynsia multidentata. Adult females were exposed to acute sublethal concentrations (0.072, 0.288 and 1.4 g L-1). After 24 hours, fish were sacrificed and gills, liver, brain, intestine and muscle were removed. Results show that both isomers of technical- grade endosulfan (α- and ß-) are accumulated in fish tissues and biotransformation to endosulfan sulfate occurs at all concentrations tested. Significantly differences in endosulfan accumulation were only found at 1.4 ug L-1 but not between the lowest concentrations. However a similar distribution pattern was observed at all exposure levels where liver, intestine and brain had the highest levels of α-, ß-endosulfan and endosulfan sulfate. Moreover, liver and brain showed the highest endosulfan sulfate:-endosulfan ratios due to high biotransfomation capacity. J. multidentata demonstrated to be a sensitive species under exposure to technical endosulfan and, therefore, could be usedto assess aquatic pollution.