The Effect of various levels of dietary protein and lipid on growth and body composition of Acipenser persicus fingerlings

Summary A 20 week feeding with three dietary protein levels (40, 45 and 50%) and four dietary energy levels (18.5, 19.8, 22.1 and 22.4 MJ kg−1) by range (P/E) ratios of 17.86–26.85 mg protein kJ−1 was conducted to investigate optimum protein, energy and protein to energy (P/E) for final weight (FW), specific growth rate (SGR), feed conversion ratio (FCR), protein efficiency ratio (PER) and Hepatosomatic index (HSI) Acipenser persicus Fingerling (Average weight 10.26 ± 0.11). Study was carried out in 3 × 4 factorial design. Acipenser persicus Fingerlings reared in fiberglass tank (500 L water volume) and fed to apparent satiation fourth daily. At the end of the experimental period six fish were sampled randomly from each replicate, killed and were preserved at −20°C for body composition analysis and Hepatosomatic index. The same energy level, increase in dietary protein from 40 to 45% resulted in significant increases in the final weight (FW) and Increase in protein levels from 40 to 45 and 50% led to a significant increase in (PER) Protein efficiency ratio fishes (P