Nutrient Utilization of Nile Tilapia Fed Enzyme Supplemented Cassava Peel Meal Based Diet
Keywords:
Cassava peel, Nile tilapia, Fingerlings, Enzyme, energy sourceAbstract
An eight-week feeding trial was conducted to determine the effect of incorporating enzyme-supplemented cassava peel meal (ESCPM) as an energy source to replace maize in the diet of Nile tilapia (Oreochromis niloticus). Five diets containing 40% crude protein were formulated in which ESCPM replaced maize at 0% (control), 25%, 50%, 75 and 100%, respectively. 70 fingerlings of Oreochromis niloticus weighing 2.36±0.06g were randomly distributed into 5 treatments of 14 fish each, replicated twice. The fish were fed at 5% body weight daily. Results indicated a significant difference (P<0.05) in mean weight gain (MWG), specific growth rate (SGR) and feed conversion ratio of the fish fed the diets. However, the fish fed with 0% (control) diet recorded the best MWG (18.90), (SGR) 1.72 and FCR (0.83) while the fish feed 100% inclusion level of ESCPM recorded the least values with 10.33, 1.29 and 1.32 in MWG, SGR and FCR, respectively. It was concluded that Oreochromis niloticus could not tolerate up to 100% inclusion level of ESCPM without deleterious effects. Nevertheless, 50% inclusion level showed the best nutrient utilisation and growth response among the ESCPM treatments fed to Oreochromis niloticus. Based on the results obtained, enzyme-supplemented cassava peel meal can be recommended as a substitute for maize in practical fish feed formulations for Nile tilapia (Oreochromis niloticus), as it enhances nutrient utilisation and supports optimal growth performance.
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