Farklı protein düzeyli diyetlerle beslenen karadeniz alabalığı (Salmo labrax Pallas, 1814)’nın büyüme performansı ve bağırsak villi morfolojisinin belirlenmesi

Abstract

This study was conducted to determine changes in the growth performance and distal intestine villi morphology of juvenile Black Sea trout ( Salmo trutta labrax ) fed diets with three different protein levels (40%, 45% and 50%). It was carried out in two separate sections; freshwater (RAS) and seawater. Juvenile Black Sea trout, having average initial weights of 3.44g (freshwater) and 17.70g (seawater), were fed for 90 days. WG, SGR, FCR and survival weren’t affected by dietary treatment. However distal intestine villi length (VL), width (VW) and length to width ratio (VL/VW) were affected by dietary treatments. Villi length, width and length to width ratio in the fish fed with diet containing 50% protein in freshwater were found to be higher than those fed with other diets. Villi length in the fish fed with diet containing 50% protein in seawater was higher than those fed with other diets. Results showed that feeding with diets contained different protein levels did not effect on growth performance of Juvenile Black Sea trout, but affected on distal intestine villi morphology.