Abstract
This trial was conducted for 42-days with 20, 40, 60 and 80 fish / 250L (stocking density: ST-20, ST-40, ST-60 and ST-80, respectively) with two dietary protein levels CP1 (25%) and CP2 (35%) on growth, feeding utilization and body composition. The results showed that growth performance in terms of final body weight, SGR, weight gain, survival rate, hepatosomatic index (HSI), total proteolytic enzyme activity and liver glycogen of hybrid tilapia fingerlings were significantly (P < 0.05) reduced at lower dietary protein level and higher ST. The feed intake, feed conversion ratio, protein efficiency rate (PER) and tissue protein levels were also significantly improved at CP2 and at lower stocking density (ST-20, ST-40). The haematological parameters such as plasma protein, cortisol, and glucose levels were significantly (P
