Fattening Performance of Bulls of three Breeds Fattened Semi-Intensively in the Kostanay Region
Indira Aitzhanova, Doskali K. Naimanov, Bartosz Miciński, Sara Dzik and Jan Miciński
OnLine Journal of Biological Sciences
The aim of this study was to determine the effect of cattle breed on carcass traits and meat quality of bulls fattened semi-intensively and slaughtered at 18 months of age. The animals were divided into three experimental groups: Group AA - 16 Angus bulls, group WK - 19 Kazakh White headed bulls, group AK - 20 Kazakh Aulie-Ata bulls. All bulls were slaughtered at the end of the fattening period. Angus bulls had the highest (p≤0.05) final body weight (494.9 kg) at 18 months of age. Average daily gain was also highest (p≤0.01 and p≤0.05) in group AA (863 g). Angus bulls were characterized by the highest carcass dressing percentage (56.8%) and the highest fat content (3.4%). Carcass length and thigh circumference were significantly (p≤0.05) higher in AA bulls than in AK bulls. The content of lean meat and fat in the carcass was highest (79.4%, p≤0.05) in AA bulls and lowest in AK bulls. Samples of semitendinosus muscle collected from AA bulls had the highest content of dry matter (24.89%), protein (22.5%) and fat (2.27%, p≤0.05).
© 2017 Indira Aitzhanova, Doskali K. Naimanov, Bartosz Miciński, Sara Dzik and Jan Miciński. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.