Murthy HS ; Varghese TJ ;

Aquaculture Nutrition vol. 1 (4)   pp. 235-239, 1995

Dep. Aquaculture, Coll. Fish., Univ. Agril. Sci., Mangalore 575 002, India

Growth studies were conducted to quantify requirements for the essential amino acids (EAA), arginine and histidine in Labeo rohita (Hamilton). Diets incorporating casein and gelatine, as sources of intact protein, supplemented with crystalline amino acids were formulated to a crude protein content of 400 g/kg. Diets with six graded levels of arginine (14.6, 17.0, 19.0, 21.0, 23.0 and 25 g/kg) and histidine (3.2, 5.0, 7.0, 9.0, 11.0 and 13.0 g/kg) were formulated and fed to triplicate groups of juvenile rohu twice a day up to satiation for 60 days. Dietary requirements for arginine and histidine for rohu, estimated using break point analysis, were 23 and 9 of the diet respectively (57.5 and 22.5 g/kg of dietary protein). Food conversion rate, specific growth rate and survival were better in treatments with diets containing optimum levels of EAA

Arginine ;  Amino acids ;  Nutritional requirements ;  Growth ;  Fish culture ;  Proteins ;  Labeo rohita ;