Relationship between temperament with performance and meat quality of feedlot steers with predominantly Charolais or Nellore breed
AUTOR(ES)
Silveira, Isabella Dias Barbosa, Fischer, Vivian, Farinatti, Luis Henrique Ebling, Restle, João, Alves Filho, Dari Celestino, Menezes, Luís Fernando Glasenapp de
FONTE
Revista Brasileira de Zootecnia
DATA DE PUBLICAÇÃO
2012-06
RESUMO
The relation between temperament with performance and meat quality was determined in 79 Charolais × Nellore steers kept in feedlot. Temperament was evaluated according to exit velocity, scale composite score and flight distance four times in the finishing phase, along with body weight, intake and feed conversion measures. Cattle were classified as calm, intermediate and excited according to exit velocity measures at the beginning of the trial. Excited cattle presented larger values for composite score and flight distance. Irrespective of genotype, excited cattle presented lower average daily gain, dry matter intake and worse feed conversion. Temperament categories did not affect most of beef quality traits, except for calm Bos indicus steers, which presented greater pH measured 1 hour post mortem compared with more reactive steers. However, moderate but negative correlations were detected between exit velocity, flight distance and composite score and beef quality as well as Warner-Bratzler shear value, luminosity, pH measured 24 hours post mortem, although they were not consistent between genotypes raised under the same conditions.
Documentos Relacionados
- Behavior patterns of cows with Charolais or Nellore breed predominance fed diets with plant extract or monensin sodium
- Performance and carcass quality of feedlot- or pasture-finished Nellore heifers according to feeding managements in the postweaning phase
- Meat characteristics of Nellore steers fed whole cottonseed
- Carcass physical composition and meat quality of Charolais cattle of different categories
- Performance and methane emissions of Nellore steers grazing tropical pasture supplemented with lipid sources