Effect of Dietary Administration of Mineral Mixture Containing Amino Acid Tryptophan and Vitamins for Growth Performance and immunity of Catla catla (Hamilton, 1822)

The commenced investigation was conducted to assess the implication of tryptophan in diets of Catla catla. The fingerlings were fed with two different diets C1 and C2; in diet C1, mineral mixture (A) without L-tryptophan and in diet C2 mineral mixture (B) containing L-tryptophan, in addition to vitamins was used. After 90 days of the feeding trial, high growth performance, nutrition retention, and better immunity were observed in fingerlings fed on diet B signifying that tryptophan influences the growth performance and immune response. Excretion of metabolites (total ammonia excretion and orthophosphate production) was significantly low in the holding water when C. catla fingerlings fed on diet C2. Better growth performance and better water quality in treatment C2 may be attributed to the presence of essential vitamins and amino acid tryptophan. Hence, the incorporation of a mineral mixture containing L-tryptophan and vitamins in the fish diet appears to be significant for better growth, nutrition retention, digestibility and immunity.