Effect of feeding with different practical diet on growth performance, food conversation rate and digestive enzyme in Caspian Kutum (Rutilus Kutum) juveniles

Subject Areas : New Technologies in Aquaculture Development

javad rezvani ¹ ()

Received: 2023-01-07 Accepted : 2023-01-07 Published : 2022-11-22

Keywords: Carbohydrate, Kutum, Keywords: Growth, Practical diet,

Abstract :

This study was carried out to evaluate the effects of different practical diet including different carbohydrate and lipid levels on growth performance, digestive enzyme in juveniles of Caspian Kutum (Rutilus kutum). Fish with initial average weight of 1.32 ± 0.25 g were fed five isoproteic and isenergic formulated diets with different carbohydrate levels including 5, 10, 15, 20 and 25% and different levels of lipid including 23, 21, 19, 17 and 15 % in triplicate groups for 10 weeks. Results showed that carbohydrate level to 25% and 15 % lipid significantly increased some growth indices such as specific growth rate (SGR) and final weight (Wf). Result of digestive enzyme showed that the digestive enzyme significantly influence by carbohydrate and lipid different levels and the highest activity in alkalinphosphatas and N amino peptidase were observed in T1 treatment. These results indicate that increased in carbohydrate levels from 5 to 25% and decreased in lipid levels from 23 to 15 % have not any negative effect on growth parameters.