Ontogenetic changes in amino acid and vitamins during early larval stages of striped trumpeter (
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Brown, MR and Battaglene, SC and Morehead, DT and Brock, M, Ontogenetic changes in amino acid and vitamins during early larval stages of striped trumpeter (
Latris lineata), Aquaculture, 248, (1-4) pp. 263-274. ISSN 0044-8486 (2005) [Refereed Article]
Changes in biochemical composition were examined during the early larval ontogeny of striped trumpeter to 14 days post-hatch (dph). The composition of total amino acids (wt.% of total) changed significantly from egg to first-feeding larvae (5 dph), but during exogenous feeding with Algamac 2000-enriched rotifers for an additional 9 days, larvae showed only minor compositional changes. The composition of total, essential amino acids (EAAs) in first-feeding larvae was closely correlated to the composition in rotifers, which suggested no major dietary imbalances of EAAs. High concentrations of free amino acids (FAAs) were found in striped trumpeter eggs, i.e. 104 mg g -1 dry weight (DW) and 28.5% of total amino acids. Concentrations dropped significantly in larvae at hatch (41 mg g-1) and further in larvae at first-feeding (15 mg g-1). These changes suggested a major metabolic role of FAAs during early ontogeny of striped trumpeter. Concentrations of ascorbic acid remained constant during exogenous feeding of striped trumpeter (510 to 590 μg g-1). However concentrations of α-tocopherol decreased from 258 to 120 μg g-1 and there was a relatively low concentration of α-tocopherol in the feed rotifers (60 μg g-1) indicating α-tocopherol concentrations might be suboptimal. The study has provided baseline information that will aid in the design of future nutritional studies with striped trumpeter larvae to test specific hypotheses. © 2005 Elsevier B.V. All rights reserved.
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