Utilization Of Fermented Mucuna Pruriens Leaf Meal As A Replacement For Soyabean Meal In Clarias Gariepinus (burchell 1822) Fingerlings Diets

Feeding trial was conducted in 18 plastic tanks (60 × 45× 30 cm) to assess the performanceof Clarias gariepinus fingerlings fed diets containing fermented Mucuna pruriens leafmeal as an alternative protein source to soya bean meal. Five iso-nitrogenous (crudeprotein- 40%) diets were formulated containing Fermented Mucuna pruriens leaf meal atA(100%F MLM), B(75% FMLM), C(50% FMLM), D(25% FMLM) and E(0% FMLM) (control) were fed at 5%to triplicate groups of 10 fingerlings (mean weight ranged from 6.20±1.96g – 6.80±1.97g)of C. gariepinus for a period of twelve (12) weeks. The Mucuna pruriens leaves werecollected and processed by Air-dried Mucuna Leaf Meal (ADMLM), Soaked Mucuna LeafMeal in cold water (SCMLM), Soaked Mucuna Leaf Meal in hot water (SHMLM) andFermented Mucuna Leaf Meal (FMLM). Proximate analysis showed that FMLM hadhighest value (25.94±0.94%) of crude protein. Analysis of anti-nutritional factors showedthat hydrocyanic acid, oxalate, phytate, saponin, and tannin were reduced significantly(P<0.05) after processing the Mucuna leaf meal. The raw and fermented Mucuna pruriensleaf meal recorded revealed there was no significant difference (P>0.05) in values ofmineral composition (calcium, magnesium, phosphorus, sodium, potassium, manganese,copper, zinc and iron). Growth performance and nutrient utilization parameters indicatethat E(0% MLM) gave the highest weight gain (168.87±3.97g) but did not significantly(P>0.05) differ from E(25% MLM), (161.30±6.12g) and the lowest weight gain (89.70±1.96g)was recorded in B(100% MLM). Similarly, the highest specific growth rate (3.79g) wasrecorded in F(0% MLM) (control) followed by E(25% MLM) which had (3.79±0.03g) and the leastvalue (3.10±0.02g) was obtained in B(100% MLM). However, feed conversion ratio (FCR),protein efficiency ratio (PER), and gross feed conversion efficiency (GFCE) were notsignificantly different (P>0.05) among the dietary treatments. The highest FCR (1.72±0.12)and least (1.50±0.02) were obtained in A(100% MLM) and E(0%FMLM) respectively. The highest (66.54±0.98) and least (58.67±4.47) were recorded in E(0% FMLM) and A(100% MLM), for GFCErespectively. The highest PER (1.64±0.03) and least (1.47±0.11) were obtained inE(0%FMLM) and A(100% FMLM), respectively. Apparent protein digestibility recorded highestvalue (61.40±0.60) in diet E(0% FMLM) and least was recorded in diet A(100% MLM)(55.87±±0.90).Cost benefit analysis showed that D(25%FMLM) had cost per kilogram of diet(₦350±17.32) and profit index (2.60±0.11) while A(100% MLM) recorded least cost per ilogram of feed (₦230±5.77) with correspondingly lowest profit index (1.69±0.06). Theresult from this study indicated that Fermented Mucuna pruriens leaf meal diet can replacesoya bean meal up to 25% in the diets for C. gariepinus without compromising growthperformance, nutrient utilization apparent digestibility coefficient and cost of production.

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