Metabolism of tryptophan, methionine and arginine in Diplodus sargus larvae fed rotifers: effect of amino acid supplementation. | - CCMAR -

Journal Article

TítuloMetabolism of tryptophan, methionine and arginine in Diplodus sargus larvae fed rotifers: effect of amino acid supplementation.
Publication TypeJournal Article
AuthorsSaavedra, M, Conceição, LEC, Pousão-Ferreira, P, Dinis, MT
Year of Publication2008
JournalAmino Acids
Volume35
Questão1
Date Published2008 Jun
Pagination59-64
ISSN1438-2199
Palavras-chaveAnimals, Arginine, Dietary Supplements, Methionine, Rotifera, Sea Bream, Tryptophan
Abstract

Dietary amino acids imbalances have been described when fish larvae are fed rotifers, what may lead to a reduction in growth rate. The tube-feeding technique can be used to assess the effect of free amino acid short term supplementation. In this study supplementation of tryptophan, methionine and arginine were tested in Diplodus sargus. Single crystalline (14)C amino acids as well as a mix of (14)C amino acids were used as tracers to compare results of individual amino acids metabolism with the average of all amino acids. The results show low absorption efficiencies for tryptophan (70%) and arginine (80%) and similar absorption for methionine (90%) when compared with the average of all amino acids. Supplementation of these amino acids seems to be viable but it did not result in higher retention compared to the amino acid mix. This means that tryptophan, methionine and arginine are probably not the limiting amino acid when Diplodus sargus larvae are fed rotifers. However, supplementation in these IAA may be required for their roles as precursors of important molecules other than proteins, in order to improve larval quality and/or performance.

DOI10.1007/s00726-007-0632-y
Sapientia

http://www.ncbi.nlm.nih.gov/pubmed/18204926?dopt=Abstract

Alternate JournalAmino Acids
PubMed ID18204926
CCMAR Authors