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Effect of the Dietary Substitution of Fish Meal with Achatina fulica Meat Meal on the Growth Performance and Production Cost of African Catfish (Clarias gariepinus) Fingerlings

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Open Journal of Animal Sciences 2024年第2期14卷 123-136页

作者： Divine Ewane Akeson Akeh Andoh Fidelis Narika Ambeno bertha anyizi nkemnyi Mbeng Ashu Arrey Benedicta Oshuware Oben Pius Mbu Oben Department of Animal Science Faculty of Agriculture and Veterinary Medicine University of Buea Buea Cameroon Department of Fisheries and Aquatic Resources Management Faculty of Agriculture and Veterinary Medicine University of Buea Buea Cameroon Department of Veterinary Medicine Faculty of Agriculture and Veterinary Medicine University of Buea Buea Cameroon

Fishmeal is the most preferred source of protein in aquafeeds, but it is expensive and scarce. Hence, Achatina fulica meat meal (AFM), which is much less preferred for human consumption out of three species of African giant land snails, was tested as a fishmeal substitute for Clarias gariepinus growth. Five iso-nitrogenous and iso-calorific diets were formulated, in which AFM substituted fish meal at 0% (control or Diet A), 25% (Diet B), 50% (Diet C), 75% (Diet D) and 100% (Diet E). These dietary treatments were each replicated thrice in a completely randomized design experiment, using 36-L plastic tanks in which the fish were fed daily rations corresponding to 5% of their body weight, for 8 weeks. Water quality parameters in the tanks were monitored. Proximate analyses were conducted on the fish meal, snail meal and experimental diets before the feeding trials. Cost-benefit analysis of the different diets was performed. The crude protein content of AFM (69.18%) was significantly higher than that of fish meal (55.81%). There was no significant difference (P > 0.05) in the mean weight gain, specific growth rate, feed conversion ratio, protein efficiency ratio and survival rate in fish fed Diet A and Diet B. The best protein efficiency ratio (0.77) was recorded in fish fed Diet B. Furthermore, the survival rate of fish increased with increased levels of AFM substitution. Water quality parameters were within a suitable range for tropical fish culture, indicating that the AFM did not pollute the water. The fish fed 25% AFM diet significantly (P Clarias gariepinus diets at a 25% substitution level. The aquaculture industry can thus exploit the availability of this feed resource.

关键词： Fish Meal Achatina fulica Meat Meal Aquafeeds Clarias gariepinus

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