Effects of canola meal on growth and digestion of rainbow trout (Oncorhynchus mykiss) fry

Authors : Nalan Özgür YİĞİT, Seval BAHADIR KOCA, Halit BAYRAK, Arife DULLUÇ, İbrahim DİLER

Pages : 533-538

View : 18 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A 12-week feeding trial was conducted with rainbow trout fry insert ignore into journalissuearticles values(initial weight of 1.57 ± 0.01 g); to examine the effects of partial substitution of canola meal in prepared diets on growth, feed conversion ratio insert ignore into journalissuearticles values(FCR);, nutrient digestibility, somatic indices, and survival rate. Five isonitrogenous insert ignore into journalissuearticles values(44% crude protein); and isocaloric insert ignore into journalissuearticles values(4000 kcal/kg digestible energy); diets were formulated to contain 8%, 16%, 24%, and 32% canola meal against no canola meal insert ignore into journalissuearticles values(control group);. A total of 375 rainbow trout were distributed into 5 experimental groups with 3 replicates. At the end of the experiment, the fish that were fed diets containing 8% and 16% canola meal exhibited similar growth performance, FCR, and protein digestibility as those receiving the control diet insert ignore into journalissuearticles values(P > 0.05);. Feed intake was reduced in the groups fed a diet containing a level of canola meal higher than 8%. A decrease in growth performance and FCR was found in the fish fed diets with 24% and 32% canola meal. Fish fed the diet containing 32% canola meal had the worst growth and FCR. No significant differences in lipid digestibility or somatic indices were found insert ignore into journalissuearticles values(P > 0.05);. This study showed that canola meal could replace standard diets by up to 8% in rainbow trout fry without adversely affecting performance.
Keywords : Key words Canola meal, feed conversion ratio, growth, nutrient digestibility, rainbow trout fry