امین اوجی فرد

The effects of dietary nucleotide on the growth performance, fatty acid composition and intestinal morphology of the Pacific white shrimp (Litopenaeus vannamei) were investigated. This study was conducted with 2 treatments in triplicate random groups of 25 shrimp (average weight of 3.21±0.04 g) per each 300-litre tank. The shrimps were fed their respective diets on a saturation basis with the feed divided into three parts to be fed at 08:00, 14:00 and 20:00 hrs. daily. In test diet, highly purified nucleotides were included rate of 0.2% into the mash with minimal water. Control diets were reconstituted in an identical manner, omitting the nucleotides. Growth, fatty acid composition and intestine epitelum cell height were analyzed per replicate treatment 5 weeks after commencing trials. Some parameters such as final weight, FCR, SGR, PER, and Lipids, 14:1n5, 20:3n3 and 22:6n3 fatty acid significantly (P < 0.05) were better in shrimps fed by dietary nucleotide than of control treatment, whilst there were no significant differences in survival, carapace length gain, dry feed consumption and crude protein, saturate fatty acid (SFA), Monounsaturated fatty acid (MUFA), Poly unsaturated fatty acid (PUFA) content as well as (n-3) PUFA and (n- 6) PUFA between the treatments (P>0.05). The mean intestine epitelum cellc height in shrimp after 5 weeks feeding with the nucleotide diet was greater than those of shrimp fed the control diet. This study showed that dietary nucleotide could be effectiveness on growth, intestine absorbance and fatty acid profile of Pacific white shrimp.