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Effect of ß-mannanase supplementation and feed presentation on carcass characteristics and macro-mineral digestibility of growing rabbits fed palm kernel based diets
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Page will reload when a filter is selected or excluded.- Carcass characteristics 7 results 7
- Carcass 5 results 5
- Broiler 3 results 3
- Carcass yield 2 results 2
- Growth 2 results 2
- Performance 2 results 2
- Primal cuts 2 results 2
- A 21-day feeding trial involving 480, 4-week old unsexed Abhor Acre broilers was carried out in a completely randomised design to evaluate performance, carcass characteristics and cost benefit of broiler finishers fed iso- caloric and iso-nitrogenous corn-soyabean based enzyme supplemented diets. Diet 1 had no supplemented Roxazyme G and phytase (T1-basal diet). The other three diets are: T2-Roxazyme G (0.2g/kg), T3-basal diet +Phytase (lg/kg) and T4-basal diet +Roxazyme G and Phytase (0.2g/kg and lg/kg) inclusion. The objective was to observe whether addition exogenous enzymes individually or as a mixture improved efficiency of broiler finisher production. The results showed no significant differences (p>0.05) across the dietary treatments for daily feed intake, weight gain and FCR. The values obtained were in the range of 137.9g, 1191.9g and 1.45 respectively. There were no significant difference (p>0.05) in carcass weight of birds on T4, T2 and TI but birds fed both Roxazyme G and phytase had heaviest carcass weight of 1533.3g . However, birds fed diets supplemented with phytase alone had significantly lower carcass weight and dressing yield to other dietary treatments. The cut up parts were not significantly different (p>0.05) except the weights of the head, drumstick and breast meat. The cost analysis showed that it is not profitable to include the enzymes in the practical broiler finishers' diet used in this study. There was no need to include the above enzymes in the diet of broilers at finishing phase as the birds at this stage can efficiently utilize nutrients in their feed. 1 results 1
- A 49-day feeding trial involving 180 1-day-old Abhor acre broilers was carried out to evaluate growth and carcass quality of broilers fed cassava leaf meal and cassava peel meals used as replacements of soya bean meal and maize at 20% respectively. Four groups of 45 birds per group of 15 birds per replicate consisting of three replicates per group. Group A served as control (cassava leaf meal (0%) and peelings meal (0%)), Group B (20% cassava peelings -20% leaf meal), C (20% leaf meal -0% cassava peelings) and group D (20% cassava peelings-0% cassava peelings). The cut parts of the carcass showed superior values (p<0.05) in the A (control) treatment and they differed significantly (p<0.05) from broilers on to the group on B (20 % cassava peelings-20 % leaf meal), C (20% leaf meal-0% cassava peelings), D (20% cassava peelings-0% cassava peelings). On the 49th day, the breast muscles of 36 birds were analysed for dry matter, proteins, fat and ash. The organoleptic values were not significantly influenced by the juiciness, taste, colour and overall acceptability among the dietary treatment levels. Up to 20% inclusion of cassava leaf meal and 20% cassava peelings as replacement for soya bean meal and maize respectively in both broiler starter and finisher, diets did not significantly affect growth and carcass yield of broilers. 1 results 1
- A 56-day feeding trial to investigate the effects of stocking density, energy and protein content on performance of broiler chickens during late wet season was carried out. In a 3 x 2 x 3 factorial arrangement using completely randomized design, six diets with three energy and two crude protein levels were formulated. Three stocking densities (birds/m2) of 10, 12 and 14 were used. A total of 576 one-week old Arbor Acre broilers chickens were assigned to the respective diets and stocking density, at 32 birds per treatment. Weight gain, feed intake, feed conversion ratio, survival rate, carcass yield, live weight/m2 and feed cost / live weight were assessed. Data were analyzed, using descriptive statistics and ANOVA α0.05. Energy x crude protein x stocking density interaction affects the feed intake (p<0.05) and the highest value was obtained using diet with low energy and crude protein levels. Treatment did not affect (p>0.05) survival rate, however, stocking density at 12 birds/m2 resulted in the best values (p<0.05) of weight gain (2230.71g) and feed conversion ratio (2.10) and the use of diets with lower crude protein and energy increased (p<0.05) the weight gain (2312.42g). The carcass yield was affected (p<0.05) by the interaction of energy x crude protein x stocking density, (p<0.05) with the lowest value (67.33%) found with birds raised on stocking density, 10 birds/m2 and diets with low crude protein and recommended energy. The lowest feed cost/live weight (p<0.05) was observed with stocking density at 12 birds/m2. Broiler chickens may be economically raised at stocking density 12 birds/m2 and on diet containing 2933kcal/kg ME with 21.92% crude protein for starter phase and 3095 kcal/kg ME and 19.14% crude protein for finishers during late wet season in Nigeria. 1 results 1
- A study was conducted to evaluate the effect of Jatropha curcas leaf extract on the performance and carcass characteristics of broiler chickens. One hundred and fifty day old Arbor Acre broiler chicks were used. They were divided into five treatments and each treatment was replicated five times. Treatment one, (Negative control, no antibiotics), Treatment two (positive control, with antibiotics) while treatments three, four and five had varying inclusion levels of the Jatropha curcas leaf extract (0.25 g/100 kg, 0.50 g/100 kg and 0.75 g/100 kg of feed respectively). The birds were raised for a total number forty two days during which, they were fed ad libitum on a deep litter system of management. Weekly weight gained and feed consumed were recorded. Evisceration of carcass was done after forty two days; each part was weighed and recorded. Performance characteristics indicated no significant (P>0.05) difference in feed consumed and feed conversion ratio, but treatment 4 with 0.50 g/100 kg of Jatropha curcas extract has the best feed conversion ratio, but there were significant (P<0.05) differences in total weight gain. 1 results 1
- A study was conducted using 16 (sixteen) half carcasses of broiler chickens with the aim of improving the yield and quality of meat products. The effects of rigor state and curing temperature on yield and quality of smoked-cooked meat were investigated using a 2 x 2 factorial arrangement. The meat was cured pre-rigor and post-rigor in hot and cold brine solution, after which they were smoked for approximately two hours to an internal temperature of 69±1ºC. The results showed that rigor states significantly (P<0.05) affected dry matter, moisture, lipid and nitrite content. Lower moisture (20.23 %) and lipid content (10.37 %) was observed in the post-rigor meat but with higher nitrite content (131.06 ppm). Curing temperatures significantly (P<0.05) affected the yield, dry matter, moisture, nitrite and salt contents of the product. The yield of meat and moisture content was higher in cold cure (14.60 % and 32.68 % respectively) but with a lower nitrite and salt content. Furthermore, the interaction between curing temperature and rigor state was also significant (P<0.05) with post rigor and cold cure interacting best with a yield of 15.88 % and lipid content of 10.35 %. Lowest moisture content was observed in the post-rigor hot cure treatment (15.49 %). Nitrite and salt contents were lower in the pre-rigor cold cure treatment (108.90 and 1.86 % respectively) with also higher ash content (5.62 %). It is concluded that optimum yield can be achieved through cold curing in post- rigor state. 1 results 1
- A study was designed to investigate the combined effects of neem and pawpaw leaves supplementation on performance and carcass characteristics of broiler chickens from 14–56 days of age. 360 one day-old unsexed Arbor acre broiler chickens were randomly allotted to the following diets T1 (0% leaf meal), T2 (0.5% NLM), T3 (2% PLM), T4 (0.5% NLM+PLM), T5 (1% NLM+PLM) and T6 (2% NLM+PLM). Results obtained from the study indicated that supplementation of NLM and PLM improved the dressing percentages, the highest values of 89.29% and 87.55% were obtained for birds on T5 and T6 respectively which were significantly different (p<0.05) when compared with the value obtained from which was 76.83%. The eviscerated weight differs significantly across the treatments, birds on T5 and T6 had significantly better (p<0.05) results of 76.93% and 75.85% respectively compared to treatments 4 and 5 which had 69.33% and 73.13% respectively. Body weight gain, feed consumed and feed conversion ratio of the broiler chickens improved in the treatments fed diets supplemented with leaf meal although and there were no significant (P>0.05) differences. 1 results 1
- A total of fifty Wistar albino rats weighing 50-60g were randomly allocated to five dietary : treatments in a completely randomized design ,to investigate the haematology, serum biochemistry and organ weight changes on diets containing processed dehulled jack bean. Four diets containing 10% crude protein were formulated to contain casein (Tl)-control diet dehulled jack bean soaked in filtrate obtained from 24hr water-steeped whole maize grains (T2), dehulled jack bean soaked in lye solution (T3), dehulled jack bean boiled or 15 minutes (T4) while a protein free diet served as a negative control (T5). The feeding trial lasted for 28days after which four rats per treatments were sampled to evaluate haematological and serum biochemical indices while three rats per treatment were sacrificed by cervical decapitation and the heart, liver, kidneys and the lungs removed and weighed separately. Haemoglobin (Hb), white blood cells (WBC), eosinophil and Mean Corpuscular Haemoglobin Concentration (MCHC) were not affected by dietary treatments while the packed cell volume, red blood cells, lymphocytes, neutrophils, monocytes, Mean Corpuscular Volume (MCV) and Mean Corpuscular Haemoglobin (MCH) were significantly affected (P<0.05) by dietary treatments. Rats on T4 had the highest PCV (47.00%), and neutrophil (25.67%) values, while rat on control had the highest value ofRBC 5.95 (10(6)/mm3). Rats on T2 had the highest lymphocyte (80.33%) and monocyte (3.50%) values, while the lowest value was for rats T4 (73.25%) and T3 (2.00%). Rats on T3 had the highest MCV (1.57fl) and MCH (0.40pg) values the total protein and alkaline phosphatise (ALP) were similar (P>0.05) for all group, while the albumin, globulin, cholesterol, Aspartate aminotransferase (AST) and Alanine aminotransferase (ALT) were influence by dietary treatments (P<0.05). Albumin values ranges from 5.83g/dl to 7.68g/dl with rats on T4 having the highest albumin value (7.63g/dl). Globulin value for rats onT4 is significantly (P<0.05) different from rats on TI, T2, T3, and T5 with rats on T3 having the highest value (3.42). Rats on TI had the highest Cholesterol (55.37mg/dl) and ALT (17.49IU/L) value, while Rats on T2 had the highest AST (16.13IU/L) value. Kidney weights were similar for all group (P>0.05) while the liver, lungs and heart relative weights were significantly affected (P< 0.05) by dietary treatments. Rats on control diet had the lowest relative weight for liver (3.74), lungs (1.03), kidney (0.92) and heart (0.49). Rats on T3 and T5 had the highest value for heart weight (0.75) and liver weight (5.67) while rats on T4 had the highest value for lungs (1.59). Rats fed dehulled jack bean seed soaked in ogi liquor showed slight improvement on haematological, serum profile and organ weight changes over those fed lye soaked jack bean and boiled for 15minutes. However, all the processing methods were ineffective when compared to the performance of rat fed casein based diets. 1 results 1
- A total of twelve adult mole grass cutter (cane rats) with an average age of 38 months were used for the evaluation of meat quality attributes and carcass characteristics. The animals were starved of feed for 16 hours, weighed, stunned, slaughtered and properly bled. The thoroughly bled carcasses were scalded and eviscerated. The dressed carcass was cut into two half carcasses, one half was dissected to determine meat yield while the other half was cut into five primal cuts of leg, shoulder, rib, loin and breast, shank and flank (B. S. F.). These cuts were cooked, their percent cook yields and cooking losses were determined. Shear force value and water holding capacity (WHC) were determined. Also determined was the length to live weight ratio. Mean live weight and dressing percentage of cane rat were 4462.50g and 66.43%, respectively. Leg and the shoulder had the highest lean yield while BSF had the least (P<0.05). The larger cuts had greater cooking losses and vice-versa. An average shear force value of 2.71kg/cm(3) was obtained while a range value of 69.15- 82.10% WHC was obtained. The meat to bone ratio was highest (P<0.05) in BSF and lead in the loin. The value obtained for lain out did not differ (P> 0.05) from the values obtained for the shoulder, rib and leg. The percent cooked yield was highest in the rib cut (79:62%) and least in the leg cut (73.90%). The length to live weight ratio was 60.4, while the average carcass length was 271. 50mm. 1 results 1
- Acidifer 1 results 1
- Ad-libitum 1 results 1
- An experiment was conducted to assess carcass characteristics and offals of broilers fed on varying forms of feeding regimes. 240, 1-day old broiler chicks-were randomly allotted to four feeding regimes each in 6 replicates of 10 birds per replicate designated as treatments as follows: ad libitum, twice a day split feeding, thrice a day split feeding and 3 hours restriction feeding. Birds were slaughtered on day 42 to determine the relative weights of the primal cuts and visceral organs. Significant differences (P<0.05) were obtained on carcass parameters' measured. Birds on ad libitum feeding had the highest bled (87.6), dressed (61.9), eviscerated (67.0) and de-feathered weights (82.5%) while the least values were obtained from birds fed thrice a day, though the values were not significantly different (P>0.05) from those of birds on twice a day split feeding regime. Birds fed ad-libitum had the highest drumstick weight (8.84%) and wing percentages (6.73%). The neck percentages were 4.47, 4.22, 3.04 and 2.84 for ad-libitum, twice a day, 3 hour restriction and thrice a day feeding respectively. Liver, abdominal and crop weights were similar (P>0.05) for ad libitum and twice feeding regime but were different (P<0.05) from thrice and restricted feeding regime. Broilers on ad libitum and twice a day feeding regimes gave the best results for carcass, primal cuts and organ weights measured. 1 results 1
- An experiment was conducted to determine the impact of fungal treated maize cob (FTMC) used as supplement on the carcass characteristics of West African dwarf (WAD) ram. Maize cob treated with Pleurotus tuber reguim was supplemented at 0, 10, 20, 30 and 40% w/w to complete feed mixtures (CFM). A total of 20 grower rams with an average age of ten months were selected for the evaluation of carcass characteristics. The animals were starved of feed for 16 hours, weighed, stunned, slaughtered and properly bled. The thoroughly bled carcass were dressed and eviscerated. The dressed carcass were cut into half carcasses, left half was dissected to determine internal offal while the other half was cut into primal cuts: neck, rack, loin, flank and leg. The final body weight (27.33kg), mean weight gain (11.58kg), rib eye area (10.70%) and dressing percentage (50.11%) were significantly better far rams on treatment 5 and in general all rams on FTMC supplemented diets compared with the control. Similarly hot carcass weight increased with supplementation from 9.55kg (T)) to 11.99kg (T2). Variations in rack and kidney weights as affected by treatments was not significant (P>0.05). Treatment effect on shoulder weight was significant (P<0.05) far animals on FTMC compared with the control groups. However, no significant (P>0.05) differences was observed far those 011 diets 3, 4 and .5 It can be concluded from the results obtained in this experiment that WAD rams fed FTMC improve the dressing percentage and rib eye area without any noticeable detrimental effect on the organ parts. 1 results 1
- Blood meal 1 results 1
- Blood profile 1 results 1
- Blood serum 1 results 1
- Brine 1 results 1
- Broiler Chicken 1 results 1
- Broiler diet 1 results 1
- Broiler finisher 1 results 1
- Broilers 1 results 1
- Broilers, Neem leaf meal. Pawpaw leaf meal. Performance and Carcass characteristics. 1 results 1
- Broilers, Tetrapleura tetraptera, Organ weights, Carcass characteristics 1 results 1
- Broilers, stocking density, performance, carcass yield, meat composition 1 results 1
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