%0 Journal Article %A Noverian, H.A. %A Shabanipour, N. %A Khoushkholgh, M.R. %A Hosseini, M.R. %T Effect of dietary digestible energy level on growth indices of kutum (Rutilus frisii kutum Kamenskii, 1901) %J Iranian Journal of Fisheries Sciences %V 7 %N 2 %U http://jifro.ir/article-1-3094-en.html %R %D 2008 %K Rutilus frisii kutum, Nutritional evaluation, Digestible energy, Growth performance, %X A 60-days feeding trail was conducted to evaluate the effects of dietary digestible energy levels (DE) on kutum, Rutilus frisii kutum. Four is nitrogenous (35% protein) diets with digestible energy levels of 2500, 2600, 2700 and 2800kcal kg-1 was tested. Two hundred and forty advanced fry (2±0.4g) were randomly distributed in 12 fiberglass tanks of 400L capacity. Nutritional responses in terms of WG, FCR and PER as well as survival rate (SR) significantly improved (p<0.05) with increase in DE level from 2500 to 2800 kcal kg-1 diet, but no difference between 2600 and 2700kcal kg-1 diet was found. Body crude protein and fat significant were increased (p<0.05) when the dietary energy was raised up from 2500 to 2600kcal DE kg-1 diet, but a further increase on energy did not improve the fish crude protein and fat content. %> http://jifro.ir/article-1-3094-en.pdf %P 205-214 %& 205 %! %9 Orginal research papers %L A-10-2031-2 %+ %G eng %@ 1562-2916 %[ 2008