Abstract

Effect of Different Levels of Protein, Fat and Carbohydrate on Growth and Body Composition of Labeo rohita

Authors: Kashif Umer, Rehana Iqbal and Waqas Ali

DOI: http://dx.doi.org/10.71081/cvj/2022.007

Abstract
Formulation of cheaper diets consisting of locally available ingredients, especially carbohydrate sources, could have a significant impact on carp culture through cost reduction. Protein, fat and carbohydrate are the basic requirement of fish like other vertebrates but the percentage of their requirement is different. Protein is the primary source of energy for fish, then lipid and carbohydrate at the end. Growth of fish is mainly determined by dietary protein input rate whereas dietary lipid and carbohydrate are supplied to satisfy energetic processes that do not require protein specifically, rather than having these fulfilled with dietary protein. There were 200 fingerlings of L. rohita distributed into ten treatments, each supplemented with an experimental diet containing 17.1+0.04kJ DE g-1 dietary energy. In experiment I: 35% (35P), 40% (40P) and 45% protein (45P), experiment II: 7% (7F), 12% (12F), 17% fat (17F) and in experiment III: 3% (3C), 5% (5C) and 7% carbohydrate (7C) containing diets were supplemented for 60 days. Growth performance and various parameters of body composition (ash, fat, and carbohydrates) were determined in wet and dry fish weight in order to demonstrate the effect of various diet composition on nutritional value of most economically important carp Labeo rohita. Study revealed that diets with increasing carbohydrate levels show better growth among the various dietary treatments of Labeo rohita can.

Keywords: Diet composition, Biochemical profile, Labeo rohita, Specific growth rate