%0 Journal Article %A Jenabi Haghparast, R. %A Sarvi moghanlou, K. %A Mohseni, M. %A Imani, A. %T Effect of soybean lecithin on growth indices, body composition, digestive enzymes activities and intestinal histomorphometery of Caspian Salmon (Salmo trutta caspius) %J Iranian Scientific Fisheries Journal %V 27 %N 5 %U http://isfj.ir/article-1-2068-en.html %R 10.22092/ISFJ.2019.118073 %D 2019 %K Lecithin, growth, Digestive enzymes, Intestinal histomorphometery, Salmo trutta caspius, %X The present study conducted to evaluate the effects of soybean lecithin on growth indices, body composition, digestive enzymes activities and intestinal histomorphometry of Caspian salmon. Ninety fish (350g ± 10) were randomly divided into three treatments with three respective replicates. The first treatment (control group) was fed with commercial feed, while the second group received diet supplemented with 12% soybean oil, and the third one received feed supplemented with 6% soybean oil and 6% soybean lecithin for 90 days. Weight gain was indicative of the statistical superiority of treatment 3 over control group and treatment 2. In addition, FCR of treatment 3 was only significantly different from control group (p≤0.05). There were significant differences regarding moisture content of treatments 2 and 3 in compare to control group (p≤0.05), however, protein and lipid contents of treatments were not significantly different (p≤0.05). Furthermore, energy contents of treatments 2 and 3 were significantly different (p≤0.05). Digestive enzymes activities (protease, lipase and amylase) of treatment 3 significantly differed from treatment 2 and control group (p≤0.05). Morphometric characteristics of intestine including epithelium thickness and external muscle thickness of treatments 2 and 3 were significantly different from those of control group (p≥0.05). In conclusion, supplementing Caspian salmon diet with 6% soybean lecithin improved growth and some physiological parameters of the fish. %> http://isfj.ir/article-1-2068-en.pdf %P 103-113 %& 103 %! %9 Research %L A-10-1702-4 %+ Department of Fisheries, Faculty of Natural Resources, Urmia University, Urmia, Iran %G eng %@ 1026-1354 %[ 2019