CARCASS QUALITY OF BROILER CHICKENS OF TWO
HYBRID LINE SLAUGHTERED IN DIFFERENT AGE
Nedeljka
Nikolova1, Snežana Bogosavljević-Bošković2
1“Ss.
Cyril and
Methodius“ University in Skopje, Institute of Animal Science,
Bul. Ilinden 92a, MK-1000 Skopje, Republic of Macedonia
2University of Kragujevac, Faculty of Agriculture, Cara Dušana 34, 32000 Čačak, Serbia
nikolova13@gmail.com
The evaluation of carcass quality of broiler chickens
is a very important segment in production, manufacture and marketing of
poultry products, which depends of many factors. The aim of this
experiment was to determine some criterions of carcass quality (carcass
mass, dressing percentage and their variances) of fattening chickens in
dependence on the following factors: hybrid, sex, age and mixture
composition. Forty male and forty female chickens of two hybrid lines
Cobb 500 and Hubbard Classic at the fifth, sixth and seventh weeks of age
were selected for slaughter by the random selection method. Chickens were
fed with two different mixtures which contented different level of
protein and energy and different values of the E : P rate. The dressing
percentage was represented by three kinds of dressings: basic or
traditional dressing, “ready for roasting” and “ready for grilling”. The
obtained results showed statistically significant (P < 0.05) influence
of age and sex on the carcass mass. Namely, the broiler chickens
slaughtered at the seventh age of week as well as the male chickens had
the biggest carcass mass in all kind of dressing. The factor age had statistically
significant (P < 0.05) influence on the dressing percentage in
general, while the factor hybrid had a significant (P < 0.05)
influence only on the dressing “ready for grilling”. Female broiler
chickens in comparison with male chickens had a better dressing
percentage at all kinds of dressing, but those differences were not
statistically significant. Differences in carcass mass and dressing
percentage under the influence of mixture composition were almost
insignificant.
Key words:
broiler chickens; carcass mass; dressing percentage; hybrid; sex; age;
mixture composition
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