Amino Acids Levels of Rainbow Trout (Oncorhynchus mykiss) Plasma During Spring – Summer Seasons

  • Daniel COCAN USAMV CLUJ
  • Elena HORJ ”Babes-Bolyai” University, 1 M. Kogalniceanu Street, 400084 Cluj-Napoca
  • Monica CULEA ”Babes-Bolyai” University, 1 M. Kogalniceanu Street, 400084 Cluj-Napoca
  • Vioara MIRESAN USAMV Cluj
  • Adela PINTEA USAMV Cluj
Keywords: rainbow trout, plasma, amino acids, seasons

Abstract

In this study, we aimed to determine blood plasma amino acids concentration of rainbow trout (Oncorhynchus mykiss) in two different seasons (spring and summer). For this, we collected blood samples from specimens of rainbow trout with body weight between 200 and 250 grams. Specimens studied, both in the spring season and in the summer, were randomly collected from breeding pools, and were part of the same batch. Growth and feeding conditions were the same for all specimenns studied. The essential amino acids determined were: threonine (Thr), valine (Val), leucine (Leu), isoleucine (Ile), methionine (Met), phenylalanine (Phe), tyrosine (Tyr) and lisine (Lys). Non-essential amino acids determined was: alanine (Ala), glycine (Gly), serine (Ser), proline (Pro), hydroxiproline (Hy-pro), ornithine (Orn), aspartic acid (Asp) and glutamic acid (Glu). Determination of amino acids concentration was performed by gas-chromatography technique and interpretation of results was performed by established statistical methods. For most amino acids, their concentration decreased in summer, compared with those recorded in the spring season.
Published
2010-10-16