The aim of this study was to assess the effect of sex and slaughter weight and their interaction on carcass quality in finishing pigs. In 2 experiments on 2 different farms, approximately 400 pigs per experiment were raised in group pens of the same sex. Gilts, boars, immunocastrates (IC) and barrows were fed ad libitum by phase feeding and were divided in 3 groups of different slaughter weights: 105, 117 and 130 kg. Pigs of both farms were slaughtered at the same slaughterhouse and carcasses were classified using the AutoFom III Classification System. There were no significant interactions between sex, slaughter weight and farm or between sex and slaughter weight on carcass quality parameters. Farm, however, had a significant effect on all carcass quality parameters and was therefore included in the statistical model as fixed factor. Meat percentage did not differ between the three slaughter weight groups. Nevertheless, price per kg carcass was lower for the 105 kg slaughter weight group compared to the 117 kg slaughter weight group (P < 0.001). These differences are present because, in addition to meat percentage, also muscle and backfat thickness, ham angle and width and centroid of the carcass determine the price per kg carcass. Muscle thickness of the 105 kg group < 117 kg group < 130 kg group. Ham angle of the 105 kg group was lower compared to the 130 kg group. Ham width and centroid of the carcass of the 105 kg group was lower compared to the 117 and 130 kg groups. Evaluation of sex indicated that meat percentage of boars > IC and gilts > barrows. Backfat thickness, ham angle and width and centroid of the carcass of boars < IC and gilts < barrows and muscle thickness was higher in barrows and gilts compared to IC and boars. Price per kg carcass of gilts > IC and boars > barrows. In conclusion, the farm has a significant effect on carcass quality but overall, gilts of the 117 kg slaughter weight group got the best price per kg carcass. Analysis of the effect of sex and slaughter weight on the obtained margin over feed costs per pig is still in progress.
|Titel||Book of Abstracts of the 67th Annual Meeting of the European Federation of Animal Science|
|Uitgeverij||Wageningen Academic Publishers|
|ISBN van geprinte versie||978-90-8686-284-9|
|ISBN van elektronische versie||978-90-8686-830-8|
|Publicatiestatus||Gepubliceerd - 29-aug-2016|
|Evenement||67th Annual Meeting of the European Federation of Animal Science - Belfast, Verenigd Koninkrijk|
Duur: 29-aug-2016 → 1-sep-2016