Corn steep liquor with lysine and chelated minerals as supplementary feed for Labeo rohita fingerlings

Abstract

Corn steep liquor (CSL) as protein source with lysine and chelated minerals is evaluated as dietary supplement for Labeo rohita (rohu) fingerlings, with weight ranges between 1.48 - 1.65 g. Experimental diets were formulated with CSL at 50% to 100% level with lysine and chelated minerals (D1-D5); and control diet contained fishmeal as a protein source (CD). Experimental diets hampered the growth performance, protein content and amylase activity; except D1. CSL based diets were found to be as digestible as control diet. Significant increase in hexokinase (D3 to D5), lactate dehydrogenase (D1 to D5), glucose-6-phosphatase (D3 to D5) and alanine amino transferase (D1 to D3, D5) activities indicates increased glycolysis and gluconeogenesis in fishes. Reduction in alkaline and acid phosphatases; and increase in lysozyme, superoxide dismutase and acetylcholine esterase activities suggest role of CSL in lowering nutrient transportation and reducing stress respectively. The test diet is not suitable for rohu early fingerlings.