Uptake, tissue distribution and metabolism of the insecticide endosulfan in Jenynsia multidentata (Anablepidae, Cyprinodontiformes) |
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Authors: | Ballesteros M L Gonzalez M Wunderlin D A Bistoni M A Miglioranza K S B |
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Affiliation: | a Universidad Nacional de Córdoba, Facultad de Ciencias Exactas Físicas y Naturales, Cátedra Diversidad Animal II, Av. Vélez Sársfield 299, 5000 Córdoba, Argentina b Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Laboratorio de Ecotoxicología, Funes 3350, 7600 Mar del Plata, Argentina c Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina d Universidad Nacional de Córdoba-CONICET, Facultad de Ciencias Químicas, Dto. Química Orgánica-CIBICI, Haya de la Torre y Medina Allende, Ciudad Universitaria, 5000 Córdoba, Argentina |
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Abstract: | 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 μg L−1). After 24 h, fish were sacrificed and gills, liver, brain, intestine and muscle were removed. Results show that both isomers of technical-grade endosulfan (α- and β-) 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 μg 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-, β-endosulfan and endosulfan sulfate. Moreover, liver and brain showed the highest endosulfan sulfate:α-endosulfan ratios due to high biotransfomation capacity. J. multidentata demonstrated to be a sensitive species under exposure to technical endosulfan and, therefore, could be used to assess aquatic pollution. |
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Keywords: | Fish Jenynsia multidentata Endosulfan Endosulfan sulfate Bioaccumulation |
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