Registro completo |
Provedor de dados: |
R. Bras. Zootec.
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País: |
Brazil
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Título: |
Reactivity, performance, color and tenderness of meat from Zebu cattle finished in feedlot
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Autores: |
Ribeiro,Julimar do Sacramento
Gonçalves,Tarcisio de Moraes
Ladeira,Márcio Machado
Tullio,Rymer Ramiz
Campos,Fabrício Rodrigues
Bergmann,José Aurélio Garcia
Machado Neto,Otávio Rodrigues
Carvalho,José Rodolfo Reis de
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Data: |
2012-04-01
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Ano: |
2012
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Palavras-chave: |
Bovine
Meat quality
Temperament
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Resumo: |
The objective of this study was to study the animal reactivity and correlate it with performance and meat quality of cattle finished in feedlots. A total of 20 animals of the Tabapuã breed and 20 animals of the Nellore breed were confined for 112 days: 28 days of adaptation and 84 days of data collection. Performance was determined by the average daily weight gain (ADG) and average dry matter intake (DMI) estimated through the use of indicators. On the 1st, 42nd and 84th days of the experiment, two methods were used to measure the animal reactivity: animal reactivity in mobile cage and visual reactivity during handling. The characteristics of meat quality were evaluated by the color, shear force and pH24 after slaughter (pH24). Through the study of correlation, the degree and direction of linear association on animal reactivity, performance and meat quality were established. Regression equations were generated for the parameters evaluated according to the values of animal reactivity. Correlations between mobile cage and visual reactivity were 0.77, 0.56 and 0.45 in the 1st, 2nd and 3rd evaluations, respectively. There was no correlation between animal reactivity and DMI. The correlations between ADG, pH24, and color with animal reactivity were -0.31, 0.40, 0.47 and -0.34, and -0.33 for mobile cage, 0.74, 0.71 and -0.51, for visual reactivity, respectively. The parameters of meat quality varied according to the reactivity. Undesirable values of pH24, animal reactivity and color were found when mobile cage reactivity was higher than 780, 590 and 540, respectively. In general, animals that show greater reactivity tend to have lower daily weight gain and lower meat quality. The reactivity can be used in animal breeding programs, in order to improve performance and meat quality of Zebu cattle finished in feedlot.
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Tipo: |
Info:eu-repo/semantics/article
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Idioma: |
Inglês
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Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400025
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Editor: |
Sociedade Brasileira de Zootecnia
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Relação: |
10.1590/S1516-35982012000400025
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Formato: |
text/html
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Fonte: |
Revista Brasileira de Zootecnia v.41 n.4 2012
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Direitos: |
info:eu-repo/semantics/openAccess
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