Effect of Different Dietary Starch Inclusion Levels on Growth Performance, Glucose Metabolism, Histological Alterations and Modulation of Hepatic Gene Expressions in Genetically Improved Labeo rohita (Jayanti Rohu)

Background: Feed cost mainly constitutes 40-60% of total aquaculture production expenses, due to the inclusion expensive animal-derived ingredients feed industry. Studies suggested that herbivore and omnivore fish species can consume higher level carbohydrate (150–300 g/kg starch) as compared carnivore fish. However, lower utilization in fishes is less understood till date. In present work, It was attempted decipher physiological changes genetically improved rohu (Jayanti Rohu) upon different levels starch regime. Methods: Three isonitrogenous (24% crude protein), isolipidic (10% ether extract) experimental diets viz. TS20 (@20% starch), TS30 (@30% TS40 (@40% were formulated fed Jayanti Rohu fingerlings (180 number with average weight 45±3.5 g) twice daily up satiation for 45 days period. The growth performance, nutrient utilization, histological modulation hepatic gene expressions evaluated after completion experiment. Result: Results indicated significantly (p than 0.05) increased gain percentage, SGR condition factor TS20. histoarchitecture cells depicted greater cell damage increasing dietary carbohydrates. glucose membrane transporter 2 metabolism involved genes showed a expression Therefore, study concluded 30% optimal diet rohu.