Patterns Of Fat Tissue Distribution And Peculiarities Of Internal Organs In Bulls That Grow With Different Growth Rates
Abstract
A. N. Ugnivenko, U. I. Tokar
Data on fat tissue distribution by various fat deposits as well as internal organs of the bulls of Ukrainian beef breed at 22,5 months of age with different growth rates have been presented in the article. Growth rate was estimated by average daily gain from 8 to 12 months of age. Depending on the growth rates, the bulls were divided into fast growing group (with average daily gains exceeding 1090 g, averaged 1207 g) and slow growing group (below 1090 g/day, averaged 1015 g). It has been proved that the lowest percentage from the total amount of fat was attributed to pericardial fat tissue and intramuscular fat tissue, the highest - to intestines, omentum and skin. Cattle with relatively higher daily gains had higher ability to accumulate raw fat by 4,5%, including pericardial fat – in 2 times, perinephric fat – by 4,5%, intestinal fat – by 10,6% and intramuscular fat – by 24%. Weight of animal organs and body parts, such as head, internal organs etc. can be considered as a factor that determine slaughter percentage. Cattle with higher rates of gain have the tendency to have higher fat output from the carcass by 5.8% and lower weight of head (by 9,6 %), lungs (by 12,5 %), and internal secretion glands, including testicles (by 8,9 %). For the effective beef production, the bulls with lower rates of gain from 8 to 12 months of age are better suited, because they are relatively taller, which indicates higher rate of metabolism, and lower predispose to fat accumulation.
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