This research was undertaken to standardize a proper grow out feed for Etroplus surentensis and demonstrate its production potential in brackish water cages”. This study involved in preparation of experimental diets with different percentage of protein and lipids followed by two rearing experimental trials. The first trial was done to assess the optimum level of protein and lipid required for E. suratensis and the second trial was carried out in brackish water cages. Experimental diets with three different percentage of protein (25%, 30%, 35%) and three different percentage of lipids (3%, 6%, 9%) was formulated. Around 20 numbers of pearl spot fingerling with an average initial body weight of 12 g. Among the different protein and lipid the maximum mean body weight was recorded in treatments T2 (30% Protein) and T5 (6% Lipid), being (15.09a±0.02g), (14.7ab±0.02g) and shows maximum survival rate (100a±0.00 %). The treatments differed significantly with control as well as with other treatments respectively (p<0.05). Hence, it could be observed that the 30% protein and 6% lipid was be the optimal requirement level for pearl spot fingerling to achieve maximum growth and survival. Again the maximum weight and survival rate in trial II was achieved in treatment T1 (30% protein and 6% lipid) which was (16.5a±0.03 g), (100a±0.00%). These treatments differ significantly with the control as well as with other treatments respectively (p<0.05).
KEY WORDS: Pearl spot, Protein requirement, Lipid requirement, Growth rate, Survival rate, Brackishwater cages.