The Effect of Formulated Dietary Nutrition and barley on Fatty Acid Composition in Common Carp (Cyprinus carpio) in Polyuculture Fish Farming

This study was conducted to investigate the effects of feeding dry commercial and barley food on the fatty acid composition of common carp (Cyprinus carpio) in in poly-culture method. To do so, 1000 fish with an average weight of 11.22± 2.71g distributed in 9 ponds of 1 ha and feeded with 1: barley, treatment 2: 50-50 as barley- commercial dry food, treatment 3: Commercial dry foods were fed for a period of 8 months. At the end of the period, the fatty acid composition of common carp fillet fed with different treatments was evaluated. The results showed that there was not a significant difference between the rates of saturated fatty acids in common carp fillets fed with different treatments (p>0.05). The highest rate of polyunsaturated fatty acids was observed in common carp fillets fed with oats treatment (P<0.05) and the dominant fatty acids were respectively 18:1n9 and 16:1n7. The highest rate of Omega-3 polyunsaturated fatty acids was observed in common carp fillets fed with formulated dietary nutrition (P<0.05) and dominant fatty acids were respectively 18:3n3, 20:3n3, and 22:6n3 and were significantly different from the treatment fed with oats (P<0.05). The highest rate of Omega-6 polyunsaturated fatty acids was observed in common carp fillets fed with formulated dietary nutrition and dominant fatty acids by 18:2n6, 18:3n6, 20:3n6 respectively were significantly different from the treatment fed with oats (P<0,05). IT index in the treatment fed with formulated dietary nutrition (0.44 ± 0.025) was significantly lower than that of other treatments (P<0.05). In general, the use of formulated dietary nutrition in feeding common carp improved the quality of fatty acid composition.

کلیدواژه ها:

common carp (Cyprinus carpio) ، fatty acid ، oats ، formulated dietary nutrition