Oxygen consumption and ammonia excretion of the freshwater crab Trichodactylus borellianus exposed to chlorpyrifos and endosulfan insecticides |
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| Institution: | 1. Instituto Nacional de Limnología (CONICET-UNL), José Maciá 1933, (3016) Santo Tomé, Santa Fe, Argentina;2. Escuela Superior de Sanidad, Facultad de Bioquímica y Ciencias Biológicas. UNL. Pje. El Pozo s/n, (3000) Santa Fe, Argentina;1. Department of Agricultural Chemistry, Tokyo University of Agriculture, Sakuragaoka 1-1-1, Setagaya, Tokyo, 156-8502, Japan;2. Department of Bioscience, Tokyo University of Agriculture, Sakuragaoka 1-1-1, Setagaya, Tokyo, 156-8502, Japan;1. Laboratorio de Biología Celular y Molecular, Departamento de Biotecnología Marina, Centro de Investigación Científica y Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana #3918, Ensenada, Baja California C.P. 22860, México;2. Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California (UABC), Av. Tecnológico s/n, Mesa de Otay, Tijuana, Baja California C.P. 22390, México;3. Laboratorio de Neurofarmacología Marina, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Blvd. Juriquilla 3001, Juriquilla, Querétaro C.P. 76230, México;4. Laboratorio de Ecofisiología de Organismos Acuáticos, Departamento de Biotecnología Marina, Centro de Investigación Científica y Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana #3918, Ensenada, Baja California C.P. 22860, México |
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| Abstract: | The effects of lethal and sublethal concentrations of chlorpyrifos and endosulfan on oxygen consumption and ammonia excretion rate of the crab Trichodactylus borellianus were evaluated. Oxygen consumption and energy expenditure had significant effect in relation to exposure times. Regarding endosulfan, a significant difference in consumption among times of exposure was registered in 625 μg L?1. Moreover, at the highest concentration, energy expenditure rate was observed stabilized during 1–3 h. A significant increase in ammonia excretion was evidenced in 150 and 300 μg L?1 of chlorpyrifos. The O:N ratio showed a decrease in chlorpyrifos and in 2500 μg L?1 of endosulfan. This indicated a shift towards protein primary metabolism. An increment in the O:N ratio was observed in the lower endosulfan solutions. The relation oxygen:nitrogen showed a shift towards lipid and carbohydrate primary metabolism. This work indicated the complexity of the metabolism in the freshwater crab affected by xenobiotic elements. |
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