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ABSTRACT
Due to the high rate of human consumption of fish and the recent decline in global fish catches, fish meal is expensive and in short supply. As a result, developing aquaculture in sub-Saharan Africa places a premium on discovering an alternative, low-cost source of protein. Due to its superior amino acid composition, soyabean meal might provide a great replacement for fish meal in the diet of clarias gariepinus. Therefore, the goals of the research are to assess the growth and economic efficiency of clarias gariepinus given a diet containing a greater proportion of soyabean meal. One hundred and fifty (150) Clarias gariepinus fingerlings was acquired from a reliable and reputable fish farm. The fingerlings was acclimatized for a period of 48hrs and fed commercial feeds. After that, the Clarias gariepinus fingerlings was randomly distributed, weighed and stocked in a rectangular plastic bowl of 50l at a density of 5 fishes/m2 which is in the lower limit recommended rate for stocking in semi-intensive system of culture. Data was analysed using genstat statistical package 2005 version, Both the analysis of variance (ANOVA) and the Duncan multiple range test were used to determine whether or not there were statistically significant differences between the groups. All methods were evaluated at a 5% level of probability. The results indicated that there was significant difference in the biweekly weight gain for the treatments and the time intervals (p <0.05). T3 (30% SBM) had a significantly higher level of weight gain, followed by T5 (50% SBM), T4 (40% SBM),T2(100% SBM), and T1 (100% FM). Therefore, growth rate of fish increased with an increase in the level of soyabean meal inclusion in the feed.
