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Meat quality of the Longissimus muscle of bulls and steers (½ Nellore vs ½ Simmental) finished in feedlot

R. M. Prado 1,  
I. N. Prado 1  ,  
J. A. Marques 1,  
P. P. Rotta 1,  
State University of Maringá, Department of Animal Science, Av. Colombo 5790, Maringá, PR Brazil
State University of Maringá, Department of Chemistry, Av. Colombo 5790, Maringá, PR Brazil
J. Anim. Feed Sci. 2009;18(2):221–230
Publication date: 2009-03-20
The experiment was carried out to evaluate performance, carcass characteristics, chemical composition and fatty acid composition of bulls and steers (1/2 Nellore vs 1/2 Simmental) finished in feedlot. From 8 to 20 months the animals were raised conventionally. At 20 month of age 16 bulls were randomly selected of which 8 were surgically castrated. At 32 months of age the animals were transferred into a feedlot system with individual pens of 10 m2. Both groups of animals were slaughtered at 35 months of age. The bulls were heavier initially and displayed higher final weight, higher average daily gain and hot carcass weight than steers, bulls also had higher moisture content, crude protein and cholesterol and lower total fat content than steers. The ratios of PUFA to SFA and of n-6 to n-3 in bulls were higher than in steers.
I. N. Prado   
State University of Maringá, Department of Animal Science, Av. Colombo 5790, Maringá, PR Brazil
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