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Articles by O.A. Amao
Total Records ( 4 ) for O.A. Amao
  G.O. Tona , V.O. Asaolu , O.A. Amao and A.A. Akingbade
  This study was carried out to investigate the chemical composition and the 24 h in vitro fermentation characteristics of various levels of Moringa oleifera leaf meal supplementation, sole or combined with other feed ingredients for ruminants. Moringa oleifera Leaf meal (MOL), dried cassava peels, palm kernel cake, bone meal and salt were milled and stored separately and then mixed together at different levels. The levels of inclusions were; D1 (0% MOL), D2 (5% MOL), D3 (10% MOL), D4 (15% MOL) and D5 (100% MOL = test ingredient). The potential gas production ranged from 26.00-37.00 mL/200 mg DM. Highest p<0.05 potential gas production were obtained with both treatments D1 and D3 while D5 recorded the lowest value. The ME was highest in D1 (8.05 MJ kg-1 DM) and lowest for both D2 (6.90 MJ kg-1 DM) and D5 (6.82 MJ kg-1 DM) which were similar. The percentage OMD was highest (p<0.05) in D1 (61.42%) and lowest in both D2 (46.22%) and D5 (46.81%) which did not differ (p>0.05). The values for SCFA were highest (p<0.05) for both D1 and D3 (0.82 μmol) and lowest for D5 (0.56 μmol). The diet (D1-0% MOL) without the inclusion of Moringa oleifera leaf meal had the highest values of in vitro gas production parameter measurements, including the ME, OMD and SCFA as compared to the other diets with Moringa oleifera leaf meal inclusions. The best level of Moringa oleifera leaf meal inclusion in the diets was 10% (D3-10% MOL) while the sole Moringa oleifera leaf meal diet (D5-100% MOL) recorded the lowest in vitro gas production parameter values. This study, thus demonstrated that Moringa oleifera leaf meal when fed in combination with conventional concentrate ingredients could enhance its utilization as feed for ruminants.
  O.A. Amao , I.O. Oladunjoye , V.A. Togun , K. Olubajo and O. Oyaniyi
  Two hundred and fifty Isa-Brown point of lay chicken of 30 weeks of age were used to determine the effect of substituting westwood (Cirina forda) larva meal (WWLM) for fish meal which is the most expensive feed ingredient in layer diet on laying performance of chicken. The birds were fed five diets in which WWLM replaced 0, 25, 50, 75 and 100% fish meal. Data collected were feed intake, weight change, egg production, feed efficiency and egg quality characteristics Data were analyzed using one-way analysis of variance. Proximate analysis showed that WWLM contained higher crude protein, crude fibre, ether extract, dry matter and ash than fish meal. Feed intake and weight gain were not significantly (p<0.05) affected by diets. Hen day production of birds fed 0% WWLM (77.86%), 25% WWLM (78.32%), 50% WWLM (77.82%) and 75% WWLM (77.37%) were similar but higher (p<0.05) than that of those fed 100% WWLM (73.39%). Birds fed 0, 25, 50 and 75% WWLM were also comparable in terms of egg weight and efficiency of feed utilization while those fed 100%WWLM were inferior with respect to these parameters. Egg shell thickness, yolk colour and Haugh unit were not significantly different among treatments. It was concluded that WWLM can replace up to 75% fish meal in the diet of laying chicken.
  O.A. Amao , D.O. Adejumo , V.A. Togun , B.S.A. Oseni and E.B. Fagbayila
  An investigation was conducted in a 2 x 4 factorial experiment to evaluate the effect of Cottonseed Cake (CSC) with or without vitamin-E supplementation on the haematological parameters of pre-pubertal rabbit bucks. The experiment involved 8 treatment combinations comprising four CSC levels (0, 5, 10 and 15%) and two vitamin-E supplementation levels (0 and 30 mg/kg diet) denoted as minus (-) vitamin-E and plus (+) vitamin-E. A feeding trial lasted for eight weeks after which blood was collected from the animals and analyzed for Haemoglobin concentration (Hb), Packed Cell Volume (PCV), Red Blood Cell Count (RBC) and White Blood Cell Count (WBC). Analysis of variance showed that CSC had significant (p<0.05) depressing effect on Hb, while WBC values increased (p<0.05) with increasing level of CSC. The PCV and RBC were not significantly affected by CSC. Vitamin-E supplementation did not have significant (p>0.05) effect on the haematological parameters of the rabbit bucks. Interaction effect of CSC and vitamin-E did not affect (p>0.05) HB, PCV and RBC while only WBC was significantly (p<0.05) affected by the interaction effect. It was concluded that CSC had adverse effect on some haematological parameters and that vitamin-E showed a tendency to correct the adverse effect. Probably a higher dose of vitamin-E is required to elicit a greater ameliorative affect.
  O.A. Amao , V.A. Togun , R.O. Afolabi , D.O. Adejumo , I.O. Oladunjoye , O.O. Adenekan and C.O. Olaniyi
  A fifty-six (56) days feeding trial was conducted in a completely randomized design to determine the haematological and serum biochemical characteristics of Hacco cocks fed Cocoabean Shell (CBS) supplemented with vitamin E and beta-glucan. Forty (40) cockerels (aged twenty-five weeks) were used. Treatment diets comprised T1 (control) (i.e. 0% CBS); T2 (20% CBS); T3 (20% CBS + Vitamin E) and T4 (20% CBS + Beta-glucan). The haematological parameters determined were Packed Cell Volume (PCV), haemoglobin concentration (Hb), Red Blood Cell Count (RBC) and White Blood Cell Count (WBC). Others included the WBC differential counts-polymorphs, lymphocytes, monocytes and eosinophils. The serum biochemical parameters determined were serum enzyme activities namely Spartate Amino Transferase (AST), Alanine Amino Trasferase (ALT) and alkaline phosphatase. Other parameters were total protein albumin, globulin and cholesterol. Treatment had significant (p<0.05) effect on PCV, RBC, WBC and polymorphs, while Hb, lymphocytes, monocytes and eosinophils were not significantly (p>0.05) affected by the treatment. Cocks that were fed CBS and CBS + Beta-glucan had similar PCV, RBC and WBC and polymorphs with the control group, while those that were fed CBS + vitamin E had lower values for PCV, RBC and polymorphs than the control group. The groups fed CBS + vitamin E had higher (p<0.05) WBC values than other groups. All the serum parameters determined were not significantly affected by dietary treatment. It was concluded that 20% CBS in diets of cocks did not show adverse effect on the blood parameters of the cocks. When supplemented with β-glucan, there was no adverse effect either. However, when supplemented with vitamin E, some haematological parameters were adversely affected.
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