Effects of dietary nucleotides on fatty acid profile in rainbow trout (Oncorhynchus mykiss) fingerlings

Nucleotides as low molecular weight intracellular compounds play key roles in diverse physiological and biochemical functions including encoding genetic in-formation and mediating energy metabolism. To determine effects of different levels of dietary nucleotides (NT) on fatty acid profile in rainbow trout. This experiment was carried out in 700 L circular tanks with 40 fish per tank. NT was added to the diet at a rate of 0. 0، 0. 05، 0. 1، 0. 15 and 0. 2 percent. Fish with average weight of 11. 35±0. 32 g were fed 5 times a day (3-5% of body weight) over 8 weeks. After 56 days of feeding، Eicosapentaenoic acid and Linolenic acid levels increased in fish fed on 0. 2% NT compared to the control group. No significant difference (p>0. 05) was in polyunsaturated fatty acids (PUFA)، n-3، n-6، n3/n6 and saturated fatty acids (SFA) among groups. It can be concluded that dietary nucleotides exerted positive effects on fatty acid composition in rainbow trout.