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

Authors

1 Graguated from the Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr-Iran

2 Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr-Iran

3 Department of Fisheries, Faculty of Marine Sciences, Tarbiat Modares University, Mazandaran, Noor- Iran

Abstract

BACKGROUND: 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. OBJECTIVES: To determine effects of different levels of dietary nucleotides (NT) on fatty acid profile in rainbow trout. METHODS: 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. RESULTS: 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. CONCLUSIONS:  It can be concluded that dietary nucleotides exerted positive effects on fatty acid composition in rainbow trout.

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