Growth Responses of Hybrid Catfish ( Hetero-clarias ) Juveniles Fed All Plant: Protein Diets Supplemented with L-lysine and L-methionine
Abstract
A 70 day feeding trial was conducted to evaluate the utilization of all plant- protein diets supplemented with L-lysine and L-methionine by Hybrid catfish (Hetero-clarias) juveniles. At the start of the experiment, fifteen (15) glass aquaria tanks (70 cm × 45 cm × 40 cm)/each, filled with borehole water up to 70 L of its capacity were stocked with one hundred (150) Hetero-clarias juveniles (Av. Wt. 16.49 ± 0.02 g)/one at 30 fish per treatment in three replicates in a complete randomized design. Five diets (D1-D5) isonitrogenous (40% Crude Protein) and isocaloric (12.1kcal/kg) were formulated. Except the control (D1), varying levels of Corn Gluten Meal (CGM) of 60% crude protein (CP) as main plant protein source were added to other plant protein materials such as Soya bean meal and Groundnut cake to formulate diets (D2-D5). Fish were fed at 5% body weight twice daily (8.00 and 10:00) for 10 weeks. Water quality parameters were monitored daily. Mean Weight Gain (MWG), Specific Growth Rate (SGR), Feed Conversion Ratio (FCR), Protein Efficiency Ratio (PER) and Net Protein Utilization (NPU) were determined. Proximate and mineral composition of the diets and fish were determined using AOAC methods. Fish fed D1 (control) significantly (PE0.05) had the best growth performance in terms of final mean weight gain (44.54 ± 0.02)g; Specific Growth Rate (1.86 ± 0.06) and Protein Efficiency Ratio (1.11 ± 0.04). The mean value for Feed Conversion Ratio (FCR) was significantly (PE0.05)…
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Evidence Hub reads this as a randomized trial. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design.
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