Global Journal of Science Frontier Research, D: Agriculture and Veterinary, Volume 23 Issue 4

There was no significantly different in specific growth rate of Tilapia between T1, T2, and T3and lower specific growth rate was obtained in T 4 . The data are also supported by other authors. Sharda et al. (2017) have also found significant difference on specific growth rate when fishmeal was completely replaced by soybean on Tilapia fish. Studies shows that replaced proportions of feed can be used for tilapia production. Similarly, there was no significant difference in survival rate (p>0.05) with each other. Jahan et al. (2007) reported that 75% fishmeal protein in the diet of Tilapia fingerlings could be replaced by defatted soybean meal without any significant reduction in growth. Davies et al. (1989) suggested that commercial soybean meal could be replaced up to 75% of fishmeal protein in diet of tilapia with no significant reduction of average final weight. Shiau et al. (1990) also observed that defatted or full fat soybean meal could be used to replace 30 % fishmeal protein in a diet for tilapia (Jahan et al., 2007). Table 3: Mean Value of Growth Parameters of Nile Tilapia Fry during the Experimental Period of 65 Days Treatments Initial weight (g) Weight gain (g) Survival Survival (%) Specific growth rate T 1 0.1±0.00 a 12.16±1.52 a 17.33±0.88 a 86.67±4.41 a 7.37±0.18 a T 2 0.1±0.00 a 11.54±1.90 a 16.00±1.00 a 80.00±5.00 a 7.28±0.24 a T 3 0.01±0.00 a 9.78±1.83 a 17.67±1.45 a 88.33±7.26 a 7.01±0.28 a T 4 0.1±0.00 a 5.1±0.74 b 17.33±1.20 a 86.67±6.00 a 6.05±0.21 b F-test * * T 1 = control diet, Diet-1; T 2 = 50% replacement of Fishmeal by Soybean meal, Diet-2; T 3 = 75% replacement of Fishmeal by Soybean meal, Diet-3 and T 4 = 100 % replacement of Fishmeal by Soybean meal, Diet-4 Mean value with a different superscript letter within same row are significantly different at p <0.05 * Indicates significant at 5% level of significance Table 2: Mean Value of FCR, PER, FE and CF of Nile Tilapia Fish during 65 Days Treatments Food Conversion Ratio (FCR) Protein Efficiency Ratio (PER) Feed Efficiency Condition Factor (CF) T 1 0.43±0.03 a 0.42±0.05 ab 0.71±0.08 a 1.50±0.23 a T 2 0.37±0.11 a 0.44±0.07 a 0.64±0.10 a 1.28±0.24 a T 3 0.32±0.12 a 0.37±0.06 ab 0.54±0.10 a 1.09±0.17 a T 4 0.30±0.02 a 0.19±0.02 b 0.64±0.09 a 1.78±0.04 a F-test * T 1 = control diet, Diet-1; T 2 = 50% replacement of Fishmeal by Soybean meal, Diet-2; T 3 = 75% replacement of Fishmeal by Soybean meal, Diet-3 and T 4 = 100 % replacement of Fishmeal by Soybean meal, Diet-4 Mean value with a different superscript letter within same row are significantly different at p <0.05 * Indicates significant at 5% level of significance d) Water Quality Mean temperature, dissolved oxygen of the water was measured daily in morning, noon and afternoon, pH, turbidity and ammonia were measured fortnightly are shown in the following figures: e) Temperature Temperature play role in fish metabolic rate and thus their energy balance and behavior, including locomotor and feeding behavior. Temperature strengths the ability of the fish to obtain food, and how they process food through digestion, absorb nutrients within the gastrointestinal tract, and store excess energy (Makori et al., 2017). Global Journal of Science Frontier Research ( D ) XXIII Issue IV Version I Year 2023 34 © 2023 Global Journals c) FCR, PER, Feed efficiency, Condition Factor The result show that analysis of variance indicated no significant difference on FCR, Feed efficiency and condition factor among the different treatment means (Table 6). The data also supported by other articles. Yanti et al. (2019) in his research in Lates Calcarifer shows that feed conversion ratio and feed efficiency were not significantly different (p>0.05) between the treatment. In the case of protein efficiency ratio, the lowest PER was seen in 100% SBM (T 4 ) and highest was seen in 50% FM+50% SBM (T 2 ) which was significantly different (p<0.05) with each other. Protease inhibitors and Phytic acid in soyabean reduce protein digestibility by inhibiting protease activity and destroying the structure of the intestinal mucosa, leading to the low availability of dietary protein (Kuba et al., 2005; Francis et al., 2001) Replacement of Fish Meal with Soybean Meal on Growth Performance of Monosex Nile Tilapia ( Oreochromis Niloticus ) Fish Diet