Changes in plasma amino acid levels in a euryhaline fish exposed to different environmental salinities

Aragão, C.; Costas, B.; Vargas-Chacoff, L.; Ruiz-Jarabo, I.; Dinis, Maria Teresa; Mancera, J. M.; Conceição, L. E. C.

http://hdl.handle.net/10400.1/4620

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Authors

Conceição, L. E. C.

Abstract(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.

Keywords

Salinity acclimation Stress Amino acids Osmoregulation Solea senegalensis

URI

http://hdl.handle.net/10400.1/4620

Citation

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.