The Investigation of Body Composition and Fatty Acids in Muscle of Grass Carp (Ctenopharyngodon idella) Fed with Lemna Sp., Azolla filiculoides and Alfalfa and Pellet

This study was performed to determine body composition and fatty acids in muscle of Grass carp (Ctenopharyngodon idella) with average weight 15.41± 0.51g, fed with different plant diet (Lemna Sp., Azolla filiculoides and Alfalfa) and Pellet (with 25 and 35 percent protein) for 90 days was conducted at the aquatic research center of Shahid Fazli Barabadi Fisheries Faculty in Gorgan University of Agricultural Sciences and Natural Resources. There is no significant difference except lipid value in the content of protein, moisture and ash samples of in these treatments (P>0.05). In all treatments in both fish, palmitic acid C16:0 and oleic C18:1 n-9 acid were the principal saturated and monounsaturated fatty acids. In this comparison Muscle fatty acid composition between treatments showed that there are significant difference in among all the fatty acids except for C16:0, C C18:1 (n-7), C22:0 and ∑SFA (P<0.05). the highest of n-3 and n-6 was obtained in Alfalfa treatment (23.61±1.7) and pellet treatment with 35% protein (13.22±0.3) respectively and the lowest was observed in pellet treatment with 25% protein (6.85±1.7) and Azolla filiculoides treatment (10.78±0.7) respectively and had significantly different to each other (P<0.05).