EFFECT OF AGE AND SEX OF SLAUGHTERED CATTLE ON DRESSING PERCENTAGE AND EUROP CLASSIFICATION RESULTS
Journal Title: Acta Scientiarum Polonorum Zootechnica - Year 2016, Vol 15, Issue 4
Abstract
The effect of bovine carcass category on dressing percentage and EUROP classification results was determined on 2627 head of slaughtered cattle, using the FREQ and GLM procedures of SAS. The largest categories of slaughter cattle were bulls (30%) as well as young bulls and cows (each around 28%). The most numerous carcass conformation class in all the categories was class O (71.91%), followed by R (15.07%), P (11.88%) and U (1.14%). Moderate fatness of bull carcasses was observed for both A and B age categories. Young bull carcasses generally contained less fat than heifer carcasses. Dressing percentage coefficients were similar for young bulls (category A) and heifers (category E) (P ≤ 0.01), as a result of which no statistically significant effect of sex on dressing percentage was found for young slaughter cattle. The age factor caused much greater differences (P ≤ 0.01) in dressing percentage values for the slaughtered females (categories D and E) than for the slaughtered males (categories A and B).
Authors and Affiliations
Marek Janiak, Anna Sawa, Mariusz Bogucki
Parasitic fauna of gastrointestinal tract of horses and evaluation of deworming effectiveness
The aim of the study was to determine the species composition of parasitic fauna of the gastrointestinal tract of horses and to assess the efficacy of ivermectin. Incidence and intensity of infection was determined based...
COMPARISON OF THE GROWTH AND BODY CONFORMATION OF DUCKS REARED IN SEMI-INTENSIVE OR INTENSIVE SYSTEMS
The aim of the study was to compare the growth and body conformation of ducks raised in a semi-intensive and an intensive system. The material for the research was Pekin Star 53 H.Y. crossbred meat ducks of French origin...
COMPARISON OF THREE METHODS OF QUEEN BEE INTRODUCTION IN A STATIONARY COMMERCIAL APIARY
Three methods of queen introduction to honey producing colonies using a metal one-frame isolator, a round queen’s cap, and a standard mailing cage were evaluated. In total, 60 Apis mellifera carnica queens, naturally ins...
Study by scanning electron microscopy of the morphogenesis of filiform and fungiform papillae in the rabbit, Oryctolagus cuniculus f. domestica
Rudiments of fungiform papillae were observed at day 18 of prenatal development. They were arranged only on the dorsal surface of the apex of the tongue and its margins. The fungiform papillae looked like a hemispherical...
Assessment of ultraviolet light effect in hatching eggs disinfection on hatchability traits of two breeds of quails and chickens
This study was carried out to investigate the effectiveness of ultraviolet light (UV) (262 nm, 10 mW ∙ cm–2) used as a disinfectant of hatching eggs for two breeds of chicken; Greenleg Partridge (GP) and Polbar (Pb) and...