Premium
Non‐essential amino acid sources in crystalline amino acid diets for trout ( Oncorhynchus mykiss )
Author(s) -
Schuhmacher A.,
Münch M.,
Gropp J. M.
Publication year - 1995
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.1995.tb00033.x
Subject(s) - amino acid , glutamine , glycine , biology , rainbow trout , proline , glutamic acid , essential amino acid , trout , food science , biochemistry , fish <actinopterygii> , fishery
A study was conducted over a 84‐day period to evaluate glycine, L‐glutamic acid and L‐glutamine as sources of non‐essential amino acids (NEAA) in dietary ‘protein’ consisting of crystalline amino acids only. The study was performed with a total of 1200 rainbow trout fingerlings ( Oncorhynchus mykiss ) of 48 g mean body mass. The addition of non‐essential amino acids (NEAA) to essential amino acids (EAA) evidently improved growth and feed efficiency: glutamine was superior to glycine and glycine superior to glutamic acid. However, the best results in growth were obtained by adding a mixture of all three NEAA. The improvement of trout performance by glutamine may hypothetically be traced back to a better amino acid absorption capacity by a less acidic intestinal milieu. In consequence, the optimal EAA to NEAA ratio may have to be redefined.