The role of dietary nucleotide on energy sources and growth function of common carp, Cyprinus carpio

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Abstract

Considering the effects of dietary nucleotides on growth and metabolism, this study was
conducted to determine the effect of different levels of this nutrient on the sources of the body
needed energy, and growth performance of common carp. Fish with average (±SD) weight of
7.5±0.2g were fed to five levels of dietary nucleotides containing 0, 0.1, 0.2, 0.3 and 0.4
percent for 8 weeks. Fish were fed 5 times daily according the satiation. After 56 days, the
results showed that the level 0.2% nucleotide had the highest growth rate in terms of weight
and length, but other parameters such as body weight, specific growth rate and feed
conversion ratio, differences were not significantly changed. Biochemical analysis of serum
parameters and proximate analysis showed that the physiological function of fish affected by
different levels of nucleotides whereas in the energy supply sources, including glucose,
triacyleglycerol, total protein and albumin there were no significant difference in cholesterol
and lipid content of carcass. This study conveys a positive effect on the biosynthesis of
dietary nucleotides on energy sources and growth functions, while the common carp has
ability to synthesize this substance into the body, the level of 0.2% in the diet can affection
*Corresponding author
sufficient effect on growth and some biochemical indices.

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Iranian Scientific Fisheries Journal
Volume 21, Issue 1 - Serial Number 78
July and August 2012
Pages 133-146

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