Browsing by Author "Mbaga, S. H."
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Item Performance of sasso and kuroiler chickens under semi-scavenging system in Tanzania: carcass and meat quality(Academic Journals Inc., 2021) Sanka, Y. D.; Mbaga, S. H.; Mutayoba, S. K.; Mushi, D. E.Background and Objective: Throughout the world, consumers are increasingly being attracted to chicken meat from naturally grown birds. A study was therefore conducted to evaluate the effect of dietary regimes on carcass and meat quality of genetically improved dual-purpose chicken. Materials and Methods: In total, 480 day-old male chicks were randomly assigned to 24 treatment combinations in a 2×3×4 factorial experiment. The treatments were breeds (Sasso and Kuroiler), diets (D 1 , D 2 and D 3 ) and levels of supplementation (100, 75, 50 and 25%). At the age of 20 weeks, five male chickens were randomly selected from each treatment combination and sacrificed for detailed carcass and meat quality assessment. Results: The Dressing Percentage (DP), pH, cooking loss, Crude Protein (CP) content of breast, thigh and drumstick joints were higher in Sasso than in Kuroiler. Values for redness (a*) and yellowness (b*) were higher in Kuroiler than in Sasso. Thigh muscle in birds fed D 2 and D 3 tended to be tougher than those fed D 1 . CP and ash contents in breast joints from D 1 and D 2 were higher than in D 3 chickens. The ether extract values for drumstick from D 1 and D 2 were comparable but higher than in D 3 . The L* and a* value in the breast joint tended to increase with a reduction in the level of supplementation but it was the opposite in the case of the drumstick. Conclusion: It is concluded that the feeding regime affects the meat quality of genetically improved dual- purpose chicken in a joint-specific fashion.Item Physical characteristics and selection criteria of Pare white goats in Kilimanjaro and Manyara districts, Tanzania(AJOL, 2018) Msemwa, J. L.; Mbaga, S. H.The study was conducted in semi-arid areas of Kilimanjaro and Manyara districts Tanzania to describe the phenotypic attributes, selection preferences and criteria employed by the Pare White Goats (PWG) keepers. A total of 280 does and 140 bucks were measured for live body weight, linear and other morphometric characters. The general linear model (GLM) procedure (SAS, 2002) was used to analyse metric and scored parameters. The bucks were significantly (P<0.001) heavier (33.2±0.5kg) than does (30.4 ± 0.2kg). The heart girth, body length, wither height and rump height were 72.5±0.2, 64.4±0.2, 64.3±0.2 and 64.3±0.2 for females and 75.0±0.4, 66.1±0.4, 67.2±0.3, 67.0±0.3cm for males. Furthermore, the result showed that PWG are predominantly white, with long legs. The percentage of goats with wattles, beards and horns were 33.1, 38.1 and 84.5% respectively. Most of the goats (81.0%) had their ears held horizontally, while 82.4% had straight face and 76.2% of the goats had straight short hairs. Farmers do prefer the PWG because of their ability to deposit fats and high adaptability to semi- arid areas. Thus, the strain can be exploited through selective breeding for hot tropical environments.