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A note on the use of plasma urea level to validate the arginine requirement assessed by growth data in seabass ( Dicentrarchus labrax )
Author(s) -
Tibaldi E.,
Tulli F.,
Lanari D.
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.tb00030.x
Subject(s) - dicentrarchus , biology , arginine , basal (medicine) , urea , zoology , medicine , biochemistry , endocrinology , fish <actinopterygii> , fishery , amino acid , insulin
Duplicate groups of 60 European seabass (mean weight 2.1 g) were fed for 9 weeks with 7 isonitrogenous (46% crude protein, CP) and isolipidic (12% ether extract) semipurified diets obtained by adding graded levels of L‐arginine to a basal diet. By analysis of dose‐weight gain relationship, the dietary arginine requirement was found to be 3.9 g/100 g CP (N'6.25). A similar value (3.8 g/100 g CP) was obtained when the 5 h (peak) post‐prandial plasma urea response relative to that of fish fed the basal diet were regressed against the dietary arginine level, suggesting the possible use of this parameter to validate the arginine requirement estimated from growth data.