Hozza, William Abdi2023-08-072023-08-072011http://www.suaire.sua.ac.tz/handle/123456789/5562Masters ThesisForty eight castrated goats (24 Small East African x Norwegian crossbreds and 24 Small East African), IS months old with average body weight of 16.7 kg were used to evaluate effect of genotype and concentrate supplementation levels on fattening, quality of carcass and meat and ultimately economics of fattening. Goats were randomly allocated into three diets varying in concentrate levels in a 2 x 3 factorial arrangement fed for 84 days. The concentrate levels were; no access to concentrate (TO), 66 % access to ad libitum concentrate allowance (Tl) and 100 % access to ad libitum concentrate allowance (T2). In addition to the supplement goats were grazed, fed hay and drinking water. Diet had significant (P<0.01) effects on total DM intake. T2 goats had 145 and 110 g higher (P<0.05) total DM intake than TO and Tl goats respectively. TO goats were 3.3 kg and 2.6 kg lower (P<0.05) in final BWT than those in T2 and Tl respectively. Supplemented goats had significantly (P<0.05) higher daily gain, body condition score, better feed conversion efficiency, dressing percentage and EUROP scores for conformation than TO goats. Diet had a significant effect (P<0.00I) on all killing out parameters. Increasing level of concentrate increased (P<0.05) fatness and DM of the meat and decreased (P<0.05) water in meat, without affecting that of ash, protein and chemical fat. Although thawing loss for LD muscle increased (P<0.05) with ageing, cooking loss and WBSF improved (P<0.05) with ageing. The lowest WBSF values were recorded for M. Psoas major and Infraspinatus. Among supplemented goats the cost of 1 kg gain under Tl was Tsh 213 cheaper than T2. It was concluded that goats should be grazed and supplemented with 400 g of concentrate for satisfactory fattening performance, meat quality and higher economic return of the enterprise.enEffectConcentrate supplementationFattening performance-qualitycarcass - meatCrossbred -smallEast AfricanGoatsThesis