Different finishing initial weights on carcass and meat characteristics of Nellore x Charolais crossbred steers

Twelve 5/8 Nellore 3/8 Charolais steers were used, with 22 months (660 days) of age. The animals were feedlot finished and divided into two categories: light animals - initial feedlot live weight (LW) of 362.67 kg and heavy animals - initial feedlot LW of 441.33 kg. The slaughter weight established was of 500 kg. The animals were fed a 60: 40 ratio corn silage and concentrate diet. The different initial weights at the finishing increased the feedlot time, since light animals were kept for 94 days and heavy animals for 30 days. Light animals had lower initial and final frames and showed higher fat thickness. The unique commercial cut that suffered influence from initial weights was sidecut. Heavy animals presented higher sawcut and lower quantity of sidecut. Heavy animals had higher muscle quantity. The lower initial weight generated animals with lower frame size and crupper height, carcasses with higher fat thickness and sidecut, lower sawcut and muscle quantity. Meat characteristics were not influenced by the different initial weights at finishing.