Exposure to Sublethal Concentrations of Copper Changes Biochemistry Parameters in Silver Catfish,Rhamdia quelen,Quoy & Gaimard |
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Authors: | Alexandra Pretto Vania Lucia Loro Vera M. Machado Silva Joseânia Salbego Charlene Cavalheiro de Menezes Carine de Freitas Souza Carolina Rosa Gioda Bernardo Baldisserotto |
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Affiliation: | 1. Laboratório de Bioquímica Adaptativa, Departamento de Química - Programa de Pós gradua??o em Biodiversidade Animal, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil 2. Departmento de Fisiologia e Farmacologia - Programa de Pós-Gradua??o em Biodiversidade Animal, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil 3. Instituto de Ciências Biológicas da Universidade Federal de Rio Grande, Campus Carreiros, Av. Itália Km 8, Rio Grande, RS, 96201-900, Brazil
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Abstract: | The effects of Cu exposure on catalase (CAT) and acetylcholinesterase (AChE) activity, formation of thiobarbituric acid-reactive species (TBARS) and metabolic parameters were evaluated in silver catfish (Rhamdia quelen). The fish were exposed for 45 days to 0, 16 and 29 μg/L Cu. The fish that were exposed to Cu exhibited lower TBARS levels in the muscle and higher TBARS levels in the liver. They also showed lower CAT activity in the liver and lower AChE activity in the brain and muscle. Higher glucose and lactate and lower protein plasma levels were observed in the fish exposed to Cu. The changes in the hepatic metabolic parameters were Cu concentration dependent. In the muscle, lower glycogen and higher lactate levels were observed in the fish exposed to Cu. Alterations in the metabolic parameters showed a preference for the anaerobic pathway of energy production and liver protein catabolism to supply the energy demand. |
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