DEPARTMENT OF ANIMAL SCIENCE
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Item This study was designed to evaluate the performance of West African dwarf rams subjected to varying degree of treated velvet bean for a period of 12 weeks. The impact of roasted velvet bean (RVB) on the performance by ram and digestibility of the feed was evaluated. In a randomized complete block design, twelve rams aged 12 and 18 months old with initial weight of 13.67- 14.25kg were randomly allotted into 3 treatments on diets A (0% RVB), B (25% RVB) and C (50% RVB). Weight gain, feed intake and feed conversion were measured. Similarly, in the digestibility trial, 3 animals per treatment were placed in metabolic cages for 14 days of stabilization and 5 days of collection. Treatment effects as affected by varying levels of velvet bean was significant for final live weight gain with values varying from 29.86kg(diet B) to 34.20kg (diet C). Also, the mean live weight gain follows the same trend with the highest mean live weight gain obtained for animals on diet C and the least mean live weight for diet B. The result obtained showed a direct relationship between total feed intake and final live weight gain. Since Mucuna pruriens is available in the dry season therefore, utilization at such period will meet dietary requirement of the sheep.(International Academic Journals, 2013-07) Ososanya, T. O.; Akinlade, A. T.; Taiwo, A. A.This study was designed to evaluate the performance of West African dwarf rams subjected to varying degree of treated velvet bean for a period of 12 weeks. The impact of roasted velvet bean (RVB) on the performance by ram and digestibility of the feed was evaluated. In a randomized complete block design, twelve rams aged 12 and 18 months old with initial weight of 13.67- 14.25kg were randomly allotted into 3 treatments on diets A (0% RVB), B (25% RVB) and C (50% RVB). Weight gain, feed intake and feed conversion were measured. Similarly, in the digestibility trial, 3 animals per treatment were placed in metabolic cages for 14 days of stabilization and 5 days of collection. Treatment effects as affected by varying levels of velvet bean was significant for final live weight gain with values varying from 29.86kg(diet B) to 34.20kg (diet C). Also, the mean live weight gain follows the same trend with the highest mean live weight gain obtained for animals on diet C and the least mean live weight for diet B. The result obtained showed a direct relationship between total feed intake and final live weight gain. Since Mucuna pruriens is available in the dry season therefore, utilization at such period will meet dietary requirement of the sheep.Item Intake, nutrient digestibility and rumen ecology of West African dwarf sheep fed palm kernel oil and wheat offal supplemented diets(International Academic Journals, 2013-05) Ososanya, T. O.; Odubola, O. T.; Shuaib-Rahim, A.Dried cassava peels (DCP), wheat offal (WO) and palm kernel oil (PKO) are readily available in the tropics during the dry season. Sixteen rams aged 15 months with weight range of 11.07 ±0.8kg were randomly divided into four treatments with four replicates in a CRD. The treatments were: T1 - 100% DCP, T2 - 80% DCP + 20% WO, T3 - 77% DCP + 20% WO + 3% PKO and T4 - 97% DCP + 3% PKO. Parameters studied were feed intake, nutrient digestibility, total volatile fatty acids and microbial population. The dry matter intake values obtained were 869.98, 8415.89, 784.36 and 462.16g/dl for Tl, T2, T3 and T4 respectively with significant differences (P < 0.05) between Tl — T3 against T4. Nutrient digestibility had significant differences (P < 0.05) amongst treatments for all parameters studied except in Neutral detergent fibre with no significance. The dry matter digestibility increased from 82.61% in Tl to 91.12% in T4, crude protein digestibility ranged from 82.89% to 89.98% for Tl and T2 respectively. There were no significant differences (P > 0.05) between T2 and T4, also between T3 and T4. Hemi cellulose appeared to be the most digestible nutrient studied. Rumen pH ranged from 6.00 to 6.70 for T2 and T4 respectively. The result was similar (P > 0.05) statistically across the treatments, except in T2. Ammonia nitrogen increased with supplementation of WO and PKO. However, supplementation of DCP with WO and PKO at 3% inclusion improved digestibility, but depressed feed intake in WAD sheep.Item Effect of protease supplementation on the performance of laying chickens fed low protein diets in early production cycle(2013) Abu, O. A.; Joshua, A. O.A 10 week study w as conducted to investigate the effect of diets supplemented with protease on .he performance of 32 weeks old Isa Brow n hens housed in cages and fed low Crude Protein (CP) diets in a completely randomized design. A total of 60 Isa Brown laying birds were randomly allotted to 5 dietary treatments each having six replicates of 2 birds per replicate. The diets were formulated to contain 16% crude protein (Treatment 1) which was the control diet: T2. 15.2% CP diet (5% CP reduction): T3. I5.20% CP diet + 0.05% protease: T4. 14.4% CP diet (10% CP reduction) and T5. 14.4% CP diet 0.05% protease. Feed and water were supplied ad libitum. Results showed that feed intake, Haugh unit and hen day production were not significant (p > 0.05). Addition of enzyme to 15.2 and 14.4% CP diets improved egg weight, shell weight, shell thickness and albumen weight. Yolk weight was improved by 14.4% CP diet. In conclusion, 10% CP reduction plus protease gave optimum performance of the laying hens and could be adopted.Item The performance and egg quality traits of Nigerian local hens fed varying dietary levels of palm kernel cake with added palm oil(Poultry Science Association, Inc., 2012) Afolabi, K. D.; Akinsoyinu, A. O.; Omojola, A. B.; Abu, O. A.A total of 120 local hens at the point of lay were randomly assigned, 2 per cage, with 10 replicates per diet in a completely randomized design, to 6 palm kernel cake (PKC)-based layer diets that contained 20% CP and 2,700 kcal of ME/kg of feed. The PKC was included at levels of 10, 20, 30, 40, and 50% in diets 2, 3, 4, 5, and 6, respectively. Diet 1 without PKC served as the control. To make the diets isocaloric, 0.5, 1.48, 3.35, 5.22, 7.11, and 8.98% palm oil was added to diets 1, 2, 3, 4, 5, and 6, respectively. Feed and water were offered ad libitum for 12 wk. The hen-day production (53.8 to 63.3%) peaked at dietary PKC levels of 20 to 40%. Feed conversion ratio was also the lowest in hens fed the 20 to 40% PKC-based diets, but it was poorer than the control diet for those fed 50% PKC. The least hen-day production was obtained for birds on the 50% PKC-based diet. The albumen height (3.16 to 3.73 mm) was highest for eggs laid by hens fed the control and 10% PKC diets. The egg yolk indexes obtained for hens fed 0 to 10% dietary PKC (0.2) were significantly higher than those obtained for hens fed 20 to 50% PKC (0.13 to 0.15). The yolk color score increased significantly (P < 0.05) across the diets (from 1.0 to 5.9) as the level of palm oil increased. The egg weight, egg circumference, eggshell thickness, egg shape index, and weights of the albumen and yolk were similar across diets. Feeding up to 40% PKC with added palm oil had no adverse effect on the performance of Nigerian local hens and the quality of their eggs.Item Performance of broiler chickens fed diets supplemented with feed grade enzyme(2009-07) Abu, O. A.; Igwebuike, J. U.; Abu, J. Z.The effect of dietary supplementation of a commercial multi-enzyme complex (Avizyme 1500™) on the performance and nutrient digestibility by broiler finishers was investigated. A total of 120 d-old broiler chickens was assigned to four treatments each having two replicates of 15 birds in a 2 x 2 factorial block design. Avizyme was-incorporated into the finisher diets at inclusion levels of 0 (high and low fibre diets), 1.0 and 2.0g/Kg diets in diets 1-4 respectively. The study covered the finisher phase (4-8 week period). Results obtained indicated that incorporation of Avizyme up to 2.0g/Kg diet into broiler finisher diet produced no significant (P > 0.05) effects on average daily feed intake and feed conversion efficiency of the birds but depressed daily weight gain (P < 0.05). The average final body weight followed the same trend as the daily weight gain, as the birds fed control diet and diet containing 1g/kg Avizyme did best (P < 0.05). The digestibility of nutrients did not differ significantly (P > 0.05) among treatments. Birds on the control diet used nutrients better than the rest treatments. The haematological parameters such as Packed Cell Volume (PCV), Haemoglobin (Hb), White Blood Cell (WBC), Mean Corpuscular Haemoglobin (MCH), and Mean Corpuscular Haemoglobin Concentration (MCHC) except for Red Blood Corpuscles (RBC) did not differ (P > 0.05) among treatments. Dressing percentage, cut-up parts and weight of organs expressed as a percentage of body weight did not differ significantly (P > .0.05). The results of this study showed that the inclusion of 1 g/kg of the enzyme mixture into broiler finisher diet did not show any adverse effect on the performance and blood parameters of the broiler chickens. The 1 g/kg level of inclusion of enzyme in the diet appears to be most beneficial to the farmer in view of its relatively better results.Item Performance characteristics of growing rabbits fed glicidia sepium leaf meal as a replacement for groundnut(Bioline International, 1999) Dada, S. A. O.; Abu, O. A.; Okeowo, T. A.; Badmus, O. R.The study involved 16 weaner crossbred (New Zealand White and Chinchila) rabbits of about eight weeks of a.fetz with initial average weight of 0.69 kg. The animals were offered a measured amount of their respective diets. The level of replacement of groundnut cake with Gliricidia leaf meal (GLM) were 0, 25 50 and 75%, to give four diets which were fed ad libitum throughout the experimental period of 35 days. The similar average daily feed intake of the rabbit fed 0, 25 and 50% GLM included diets was significantly (P < 0.05) higher than the corresponding daily weight gain of the rabbits fed 25 and 50% GLM diets and those fed 75% GLM diet recorded the least (P < 0.05) daily gain. Dry matter intake (DMI) was significantly correlated with daily weight gain (r = 0.94, P < 0.05) and feed efficiency (r = 0.90, P < 0.05).Item Assessment of the effects of supplementing rabbit diets with a culture of saccharomyces cerevisiae using performance, blood composition and clinical enzyme activities(Elsevier, 1999) Onifade, A. A.; Obiyan, R. I.; Onipede, E.; Adejumo, D. O.; Abu, O. A.; Babatunde, G. M.The effects of dietary supplementation with a pure culture of Saccharomyces cerevisiae at 0.0, 1.5 and 3.0 g kg−1 on growth performance, blood composition and clinical enzyme activities in serum of rabbits were studied during a 56-day experiment. Rabbits fed 3.0 g kg−1 attained the heaviest (P < 0.05) body weight, consumed the highest (P < 0.05) quantity of feed and had the best (P < 0.05) feed conversion. Rabbits fed 1.5 g kg−1 yeast had higher (P < 0.05) body weight, feed intake and feed conversion efficiency than the unsupplemented group. The haematocrit, erythrocytes, haemoglobin, serum albumin: globulin ratio, and erythrocytic indices in rabbits fed 3.0 g kg−1 were superior (P < 0.05) to the unsupplemented group. Other haematological indices were similar (P > 0.05); but differential populations of lymphocytes were fewer (P < 0.05) and monocytes and eosinophils were larger (P < 0.05) in rabbits fed the basal group. Serum Ca2+, globulin, cholesterol, aspartate and alanine aminotransferases, and alkaline phosphatase were higher (P < 0.05) in the basal group than with the yeast-supplemented diets. The data obtained suggest that yeast addition significantly improved growth performance, enhanced haematopoiesis, reduced serum cholesterol and maintained the serum enzymes at normal ranges. Furthermore, the activities of the clinical enzymes suggested liver- and bone-specific advantages from supplemental yeast. The effects of yeast were dose-dependent, and there is a need to determine the economically optimum dietary concentration.Item Productive response of rabbits to supplemental copper in a diet based on tropical feedstuffs(Taylor & Francis, 1998) Onifade, A. A.; Abu, O. A.Effects of supplemental copper in a diet based on tropical feedstuffs on productive performance, carcass measurements and haematology of rabbits were investigated in a 70d trial. Copper as CuS04.5H2O was supplemented at 0, 125, 250 and 375 mg kg-1 into a basal diet. The basal diet served as control treatment. Eight rabbits, each constituting a replicate, were fed on one of the experimental diets. The results showed that daily weight gain and feed intake of the rabbits fed 250 and 375 mg kg-1 supplemental copper were the highest followed by rabbits fed 125 mg kg-1 and the basal diet. Relative weights of the selected organs were similar except for the brain that tended to be lower in rabbits fed 250 and 375 mg kg-1 copper. Haemoglobin, packed cell volume and red blood counts were lower on 375 mg kg-1, however, haematological indices in rabbits fed 125 and 250 mg kg-1 were superior to other treatments. The results indicated that supplemental copper in a diet based on tropical feedstuffs improved performance, supported adequate organ development and might adversely affect haematopoiesis in rabbits at 375 mg kg-1 rate of inclusion.Item Performance and carcass characteristics of broiler chicken fed soybean and sesame/soybean based diets supplemented with or without microbial phytase(2014-07) Omojola, A. B.; Otunla, T. A.; Olusola, O. O.; Adebiyi, O. A.; Ologhobo, A. D.Aims: The experiment was conducted to investigate the performance and carcass characteristics of meat-type chicken fed Soybean Meal (SBM) and Sesame/Soybean Meal (SSBM) supplemented with or without microbial phytase. Study Design: The experiment employed a complete randomized design; all data generated were subjected to analysis of variance, P=0.05. Place and Duration of Study: The study was carried out at the Teaching and Research Farm of the University of Ibadan, Nigeria, between October and December, 2011. Methodology: One hundred and sixty-eight unsexed two weeks old Arbor Acre strain chickens were used in a 35-day feeding trial. Two feeding regimes of soybean meal and Sesame/soybean meal based diets were formulated. Each feeding regime comprised of control diet and two levels of phytase units (300 and 600 FTU/kg) of 500 unit /g activity making a total of six dietary treatments. The birds were fed the experimental diets for a 35- and Feed Conversion Ratio (FCR). At the end of the feeding trial, three birds were slaughtered per replicate to evaluate carcass and meat characteristics. Results: The addition of phytase improved the birds’ performance, FI and FCR. Significant (P<0.05) increase was obtained for apparent retention of nitrogen (67.22%), ash (74.85%), ether extract (65.43%), crude fibre (76.22%) and Phosphorus (45.58%). Cooking loss values increased while the Water Holding Capacity (WHC) reduced with microbial phytase supplementation. Conclusion: Sesame/soybean diet supplemented with 300 FTU/Kg microbial phytase gave optimum performance and should probably be adopted as the feeding regime of choice since it also resulted in better nutrient utilization by the birds.Item Effect of three sources of fibre and period of feeding on the performance, carcass measures, organ relative weight and meat quality in broilers(Asian Network for Scientific Information, 2005) Iyayi, E. A.; Ogunsola, O.; Ijaya, R.One hundred and fifty male broilers were used in a 3 x 3 factorial design to evaluate the effect of 3 periods (4, 8 and 12 weeks) and 3 fibre sources namely; brewer’s dried grain (BDG), palm kernel meal (PKM) and corn bran (CB) in place of maize on the performance, carcase measures and meat quality in the birds. A sensory evaluation to determine the overall acceptability of the meat was also carried out. Four diets were formulated consisting of a basal diet containing none of the test fibre ingredients. In the remaining 3 diets, either of BDG, CB or PKM was used to replace 40% of the maize. A separate balance study was also carried out to determine the digestibility of nutrients in the birds. BDG, CB and PKM significantly (p<0.01) reduced the weight and feed conversion in the birds but period of feeding resulted in increased body weights of the birds. BDG, CB and PKM significantly (p<0.01) reduced the eviscerated weights and the weights of carcase parts but period significantly (p<0.01) increased them. Dietary treatment, period and their interaction significantly (p<0.01) reduced the abdominal fat in the birds and caused a significant (p<0.05) increase in the lengths of the duodenum, ileum, caecum and colon as well as the weight of the intestines. Digestibility of nutrients was significantly (p<0.1) reduced in birds on the fibre diets. The shear force values in carcase parts were significantly increased in the BDG, CB and PKM diets while the cooking loss was significantly (p<0.05) reduced in these diets. Period and interaction with dietary treatment also caused a significant (p<0.01) reduction in cooking loss. Tenderness, flavour and juiciness were significantly (p<0.01) influenced by period and not treatment but overall acceptability of the meat was significantly (p<0.05) increased by both factors. Results of the study suggest 1) 40% BDG, CB and PKM replacement of maize has a negative effect on the weight gain and feed conversion of broilers, 2) 40 % level of BDG, CB and PKM caused an increase in the weights and lengths of the visceral organs and reduced carcase weight in broilers, 3) production of broilers up 10-12 weeks on 40% BDG, CB or PKM diet resulted in creased flavour, juiciness, higher shear force, reduced tenderness, reduced cooking loss but increased general acceptability of broiler meat.