EFFECTS OF DIFFERENT LEVELS OF POULTRY MEAL INCLUSION IN REPLACEMENT FOR FISH MEAL ON GROWTH PERFORMANCE AND FEED UTILIZATION IN TILAPIA (OREOCHROMIS NILOTICUS) FRYS.S. Rathore, S. I. Yusufzai, P.J. Mahida, S.R. Lende and S. Kumar
This study provides information on the use of poultry meal (PM) as an alternative protein source for tilapia feeding. The five isonitrogenous experimental diets consisted of a control diet (100% fish meal as protein source) and four treatment diets in which fish meal replaced with PM (25%, 50%, 75% and 100% of dietary protein) were prepared. The diets were formulated to provide 40% crude protein on a dry weight basis. Total 200 numbers of tilapia (Oreochromis niloticus) fry were randomly distributed into five treatments (control + treatments), each in four replicates. Tilapia (Oreochromis niloticus) fry (initial average weight 1.56 ± 0.10 g) were fed experimental diets ad libitum during the experimental duration. The water quality parameters viz. dissolved oxygen; alkalinity, pH, nitrate and nitrite were found in the permissible range during entire experimental period. Based on the results obtained, there was significant difference (P <0.05) reported in weight and length gain, specific growth rate (SGR), food conversion ratio (FCR), and protein efficiency ratio (PER) of fry fed with the different feeds during a period of 60 days. Fish fed the diets containing 0 and 25% PM showed significantly better performance in terms of final length, length gain, final body weight, weight gain (%), SGR, FCR and PER than higher PM diets. It is concluded that poultry meal is a promising alternative protein source for tilapia feeding, improving growth ratio at dietary inclusion levels as high as 50%.
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