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¹ ICAR- Central Institute Of Fisheries Education, Fish Nutrition, Biochemistry and Physiology Division, off Yari Road,Panch Marg ,Versova,Mumbai 400061,India
² ICAR- Central Institute Of Fisheries Education, Near Old Burma Shell, Beach Road, Kakinada, AP-533007 DOI : 10.4194/1303-2712-v18_1_11 Viewed : 8936 - Downloaded : 5019 A 60-days feeding trial was conducted to study the dietary energy requirement of Pangasianodon hypophthalmus (Sauvage1878) juveniles reared either at ambient (24.5°C) or higher temperature (32°C) and fed with one of the four diets having dietary energy content of 342 Kcal. 100 g^-1(T1), 379Kcal. 100 g^-1(T2), 428.5 Kcal. 100 g^-1(T3) and 448.6 Kcal. 100 g^-1(T4). Juveniles of P. hypophthalmus with amean weight 4.27±0.12 to 4.40±0.10 g was stocked in 24 uniform size plastic rectangular tanks in triplicates with 10 fish per tank following a 2x4 factorial design. Growth performance and nutrient utilization of P. hypophthalmus were higher at the dietary energy content of 428.5 Kcal. 100 g^-1(T3) at both the temperatures. The body composition of P. hypophthalmus did not differ significantly (p>0.05) as the energy content of the diet increase. However, the tissue lipid content was significantly varied (p<0.05) at different temperature and energy levels. Based on the second order polynomial regression equation the dietary energy requirement of P. hypophthalmus was recorded to be 410 Kcal. 100 g^-1 and 402.5 Kcal. 100 g^-1 at 32°C and at ambient temperature(24.5°C), respectively. Keywords : Pangasianodon hypophthalmus, Dietary Energy, Temperature, Growth, Polynomial regression