Feasibility of fishmeal replacement by shrimp head silage protein hydrolysate in Nile tilapia (Oreochromis niloticus L) diets |
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Authors: | Maribel Plascencia‐Jatomea,Miguel A Olvera‐Novoa,Jos Luis Arredondo‐Figueroa,George M Hall,Keiko Shirai |
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Affiliation: | Maribel Plascencia‐Jatomea,Miguel A Olvera‐Novoa,José Luis Arredondo‐Figueroa,George M Hall,Keiko Shirai |
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Abstract: | This study provides information on the use of shrimp head silage protein hydrolysate (SPH) as an alternative protein source for tilapia feeding. Six diets (28% protein, 12% lipid) were prepared where fishmeal protein was replaced at levels of 0 (control), 10, 15, 20, 25 and 30% with the hydrolysate. The diets were supplied to Nile tilapia fry (338 mg initial weight) stocked in plastic recirculating 20 l tanks (10 animals per tank), with three replicates per treatment. After an 8 week experimental period, fish fed the diets containing 10 and 15% SPH showed significantly better performance in terms of final body weight, weight gain (%), mean daily weight gain (mg day?1), specific growth ratio and feed conversion ratio than those fed the control diet (fishmeal as protein source) and higher‐SPH diets. It is concluded that shrimp head hydrolysate is a promising alternative protein source for tilapia feeding, improving growth ratio at dietary inclusion levels as high as 15%. In addition, the diets with added shrimp silage protein were well accepted by the fish, which avidly consumed the feed during the experiment. © 2002 Society of Chemical Industry |
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Keywords: | silage protein hydrolysates tilapia fishmeal lactic acid fermentation nutrition shrimp wastes |
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