Effect of feeding Colocasia (Colocasia esculenta (L) Schottl corn flour as a part of energy supplement on growth and nutrient utilization in Clarias gariepinus (Burchell, 1822) fingerlings
2009
Alegbeleye, W.O. | Obasa, S.O. | Olugbenga, O. | Ramoni, N.
The objective of this study was to compare the nutritive value of boiled Colocasia esculenta flour (CECF) with that of yellow maize in practical rations of fingerlings. Boiling resulted in a slight increase in crude protein content and significant (84.5%) decrease in oxalate content. Five is oproteic (30% crude protein) and isocaloric (15.46 Kjg-1) diets were formulated. The control diet contained maize as the principal dietary energy source, while flour produced from boiled Colocasia corn progressively replaced maize at 5 inclusion levels (0%, 20%, 40% 60% and 80%). The experimental diets were fed to triplicate group of Clarias gariepinus fingerlings (mean weight 2.05~c0.5g) at 3% body weight day-1. Growth performance expressed as weight gain, specific grown rate (SGR) and nutrient utilization expressed as feed conversation ration (FCR), protein efficiency ration (PER) were assessed. There was a trend of decrease in weight gain with increase in inclusion level of CECF. Weight gains of groups of C. gariepinus fed up to 60% inclusion level of CECF were nog significantly (p>0.05) different from the group fed the control diet, the same trend was observed for SGR. FCR and other parameters were poorer (p<0.05) in digestibility coefficients among the different groups, also that carcass composition did not vary significantly (p<0.5) among treatments. Results also indicate that CECF is an acceptable ingredient that can replace maize up to 20% inclusion in C. gariepinus rations.
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