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Changes in plasma amino acid levels in a euryhaline fish exposed to different environmental salinities
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Autores
Conceição, L. E. C.
Orientador(es)
Resumo(s)
Previous studies have shown that Senegalese sole is partially euryhaline in the juvenile phase, being able to adapt to a wide range of salinities in a short-time period, due to changes at the osmoregulatory and metabolic level. This study aimed to assess the effects of acclimation of sole to a wide range of salinities, with a special emphasis on the role of plasma amino acids during this process. Sole juveniles were acclimated for 2 weeks to different salinities: 5, 15, 25, 38, and 55 g L−1. Plasma levels of cortisol, glucose, osmolality, and free amino acids were assessed at the end. Changes in plasma levels of cortisol, glucose, and amino acids indicate that fish reared at 5 and 55 g L−1 were facing extra energy costs. Amino acids seem to play an important role during salinity acclimation, either as energy sources or as important osmolytes for cell volume regulation.
Descrição
Palavras-chave
Salinity acclimation Stress Amino acids Osmoregulation Solea senegalensis
Contexto Educativo
Citação
Aragão, C.; Costas, B.; Vargas-Chacoff, L.; Ruiz-Jarabo, I.; Dinis, M.T.; Mancera, J.M.; Conceição, L.E.C.Changes in plasma amino acid levels in a euryhaline fish exposed to different environmental salinities, Amino Acids, 38, 1, 311-317, 2010.
Editora
Springer Verlag