Carcass characteristics of 1/2 Puruna vs. 1/2 Canchim bulls finished with 16 or 22 months of age with three different weights

摘要

This work was carried out to evaluate carcass characteristics of 14 Puruna vs. !4 Canchim bulls finished in feedlot and slaughtered with three different weights (light, medium or weighty). The experiment was conducted at model farm on experimental station of Institute Agronomico do Parana - Iapar, located at Ponta Grossa city at Parana estate in Brazil. 1131/2 Puruna vs. 1/2 Canchim bulls were used. The animals were allocated according to the finishing system (super early (SUP) - 16 months old or early (EAR) - 22 months old) and according to the.slaughter weight (light - 420.00 kg; medium - 470.00 kg and weighty - 550.00 kg). There was not interaction (P>0.05) between the system of finishing and the slaughter weight. There was difference (P<0.05) to hot carcass weight between the systems of finishing. SUP bulls presented higher hot carcass weight (259.74 kg) in comparison with EAR bulls (251.72 kg). This difference was influenced by hot carcass dressing. This characteristic was higher (P＜0.05) to SUP bulls (55.00%) in comparison to EAR bulls (53.74%). The greater use of carcass, SUP bulls presented higher (P<0.05) hot carcass weight. SUP bulls (1.60 kg) presented higher (P<0.05) average daily gain in comparison with EAR bulls (1.19 kg). Bulls slaughtered weighty (64.98%) presented higher (P＜0.05) muscle percentage in comparison to animals slaughtered light (58.92%) and medium (59.95%). This can be due the higher capacity of muscle deposition that these bulls present due their frame. Younger bulls present higher hot carcass dressing and higher hot carcass weight.