Effected by dietary nucleotide on changes in intestinal morphology, growth and fatty acid profile of whiteleg shrimp (Litopenaeus vannamei)

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Abstract

The effects of dietary nucleotide (0.2%) on the growth, intestinal morphology as well as
fatty acid profile of the whiteleg shrimp, Litopenaeus vannamei was investigated in Bushehr
province (Delvar) for a 5-week feeding trial. The experiment was carried out in triplicate in
circular PVC tanks of 300L capacity. Each tank was randomly filled with 25 shrimps
weighting on average 3.21±0.03g. Added dietary nucleotide significantly improved growth
factors such as 10% weight increase, 7.97% increase in specific growth rate (SGR), 11.32%
increase in protein efficiency ratio (PER), 9.64% decrease in feed conversion ratio (FCR) and
14:1n5, 20:3n3 and DHA fatty acids. However, no significant differences were evident in
survival, carapace length gain, daily feed consumption and saturate fatty acid (SFA),
monounsaturated fatty acid (MUFA), poly unsaturated fatty acid (PUFA) content, n-3/n-6 as
well as EPA+DHA fatty acids between the two treatments. Intestine epithelium cells height
(IECH) in the abdominal first section were significantly higher in shrimp fed by dietary
nucleotide.
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Keywords

Iranian Scientific Fisheries Journal
Volume 20, Issue 4 - Serial Number 77
July and August 2011
Pages 1-10

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