The effect of the rearing system and biological factors on carcass conformation and slaughter traits of fattening chickens

Abstract

The effect of the rearing system (intensive and semi intensive) and biological factors (genotype, age, sex) on absolute and index values of carcass conformation measures in chickens (metatarsus length, keel length, breast depth, thigh girth and breast angle) was investigated. In the trial Arbor Acres and Redbro chickens were used and duration of fattening was 42 and 50 days. Chickens at the age of 50 days had better conformation compared to chickens at the age of 42 days. Carcasses of male chickens had better conformation than female chickens. Genotype Arbor Acres had considerably higher values of relative conformation measures than chickens of Redbro genotype. Chickens reared in chicken coop had higher values for length of metatarsus, breast depth and thigh girth compared to chicken reared on free range.

Ispitivan je uticaj sistema gajenja (intenzivan i poluintenzivan) i bioloških faktora (genotip, uzrast, pol) na apsolutne i indeksne vrednosti mera konformacije trupa pilića (dužina piska, dužina kobilice, dubina grudi, obim bataka i grudni ugao). U ogledu su bili pilići Arbor Acres i Redbro i dužina trajanja tova bila je 42 i 50 dana. Pilići uzrasta 50 dana su imali bolju konformaciju od pilića uzrasta 42 dana. Trupovi petlića imali su bolju konformaciju od kokica. Genotip Arbor Acres imao je značajno veće vrednosti relativnih mera konformacije od pilića genotipa Redbro. Pilići odgajani u objektu u odnosu na piliće odgajane na ispustu imali su duže piskove, dublje grudi i veći obim bataka.