The effect of age of fatteners at slaughtering on slaughter values of Swedish landrace pigs

Abstract

In order to investigate the effect of age of fatteners at slaughtering on quality of carcass sides, investigation in 115 fatteners of Swedish Landrace breed were carried out. Three groups of animals of different age were formed with different number of fatteners in the group, equal in regard to sex of animals which all come for same farm in Serbia. Highly significant (**P (lt) 0,01) effect of age of fatteners at slaughtering on quality of carcass sides was established. Considering the negative sign with the coefficient b, we can conclude that the negative regression of age on quality of carcass sides was observed. The oldest fatteners (>260 days) had the lightest carcass sides (65,218 kg), the lowest gain per day of life (237,14 days) and the lowest share of meat in sides (35,369%) which has no economical justification. Therefore, justification for prolonged fattening of pigs of investigated genotype needs to be reconsidered considering different quality of carcass sides of certain age groups.

U cilju utvrđivanja uticaja starosti tovljenika pri klanju na kvalitet polutki, izvršena su ispitivanja na 115 tovljenika rase švedski landras. Formirane su tri starosne grupe, sa različitim brojem tovljenika u grupi, izjednačene po polu, poreklom sa jedne farme u Srbiji. Po završetku ispitivanja, grla su žrtvovana sa prosečnom starošću od 233,983 dana i prosečne težine polutki 73,5994 kg. Ustanovljen je visoko značajan (P (lt) 0,01) uticaj starosti tovljenika pri klanju na kvalitet polutki. Pošto je negativan predznak uz koeficijent b, može se govoriti o jednoj negativnoj regresiji starosti na kvalitet polutki. Najstariji tovljenici (>260 dana) imali su najlakše polutke (65,218 kg), sa najnižim prirastom po danu života (237,14 dana) i najnižim udelom mesa u polutkama (35,369%) što nema svoju ekonomsku opravdanost.