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Journal of Fisheries and Aquatic Science
Year: 2007  |  Volume: 2  |  Issue: 5  |  Page No.: 353 - 360

Culture and Utilization of Tadpole as Animal Protein Supplement in the Diet of Heterobranchus longifilis Fingerlings

O.A. Sogbesan, C.T. Madu and A.A.A. Ugwumba    

Abstract: Two hundred and forty Bufo maculata tadpoles of weight range 0.038-0.045 g (mean weight 0.04±0.008) g and lengths 1.2-1.6 cm (mean 1.4±0.018 cm) were randomly selected from a breeding tanks (2.0H 2.0H1.0 m) and raised in outdoor concrete culture tanks (1.0H1.0H0.75 m) for 84 days and monitored for growth, productivity and nutrient utilization. Tadpole were harvested, processed into meal and used in compounding five experimental diets of 42.5% crude protein to replace fish meal at different inclusion levels of 0% (control), 25, 50, 75 and 100% fed to Heterobranchus longifilis fingerlings. The mean weight gain for cultured tadpole was 3.16 g/tadpole; specific growth rate 2.21% and feed conversion ratio, 1.04. The result of the feeding experiment shows that WG, RGW, SGR, FCR and feed intake favoured fingerlings fed 50 and 25% whole tadpole meal inclusion diets with insignificant difference p< 0.05 compared to other treatments. Highest insignificant difference p< 0.05 apparent crude protein digestibility of 90.88% was in 25% whole tadpole meal. Better cost benefit ratio was reported in 25 and 50% whole tadpole meal diets. Based on the result of this study, the replacement of tadpole meal is recommended to 50% inclusion levels in the diet of H. longifilis for better growth performance, feed utilization, health status and cost benefits.

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