| Summary: | Replacement of 15% protein from soybean meal in Diet II was feasible for the stinging cat fish, Heteropneustes fossilis and no significant differences in growth parameters were found in fish fed soybean meal-based diets compared to those fed control diet (Diet I). Live weight gain percent (165%) obtained in fish fed soybean meal based diet was not significantly different to that achieved (171%) in fish fed Diet I. Specific growth rate percent, SGR (2.79%), feed conversion ratio FCR (1.40) and protein efficiency ratio PER (1.79) recorded in fish fed Diet II were also more less comparable to those fed control diet. Mortality was not recorded in the period of the feeding trial. Body composition of the fish fed soybean meal based diet (Diet II) was also comparable to that fed control diet. Significantly higher fat content was noted in fish fed Diet II. However, the protein contents were not changed in fish fed Diet I and II. Similarly, no significant differences (P > 0.05) in protein productive value were noted between the two groups. However, ash content differed significantly (P < 0.05) in fish fed Diet I and II. Although soybean meal-based diet depressed growth and feed conversion efficiencies of the fish to some extent, inclusion of soybean meal was found to be cost-effective alternative to fish meal.
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