Estimation of the carcass composition from a cross-section of the rib-loin from crossbred Japanese Black x Limousin F2 cattle by computer image analysis

The carcass composition of crossbred Japanese Black x Limousin F2 cattle was examined in order to find an accurate carcass composition equation. The test animals included 17 steers and 17 heifers. The 28 image measurements from the area encircling the vertical line to the thoracic vertebra and the l...

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Bibliographic Details
Published in:Animal science journal 2007-12, Vol.78 (6)
Main Authors: Nade, T.(National Livestock Breeding Center, Nishigo, Fukushima (Japan)), Saburi, J, Abe, T, Nakagawa, T, Okumura, T, Misumi, S, Saito, K, Kawamura, T, Fujita, K
Format: Article
Language:English
Subjects:
ANALISIS DE IMAGENES
ANALYSE D'IMAGE
BOVIN
CARCASS COMPOSITION
CATTLE
COMPOSICION DE LA CANAL
COMPOSITION DE LA CARCASSE
CORPS GRAS
CROSSBREDS
FATS
GANADO BOVINO
GRASAS
IMAGE ANALYSIS
MUSCLE
MUSCLES
MUSCULOS
PRODUCTOS DEL CRUZAMIENTO
PRODUIT DE CROISEMENT
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Summary:The carcass composition of crossbred Japanese Black x Limousin F2 cattle was examined in order to find an accurate carcass composition equation. The test animals included 17 steers and 17 heifers. The 28 image measurements from the area encircling the vertical line to the thoracic vertebra and the line from the thoracic vertebra between the sixth and seventh rib-bones were measured by computer image analysis. The relationships between the 29 parameters that added the carcass left side weight of the animal and the carcass composition were suggested. The carcass composition included muscle weight, muscle ratio, fat weight and fat ratio. The carcass composition from steers was estimated by an equation composed of these three or four parameters (R**2=90.80%, 79.30%, 90.75% and 73.70%, respectively). The selected parameters were measured without cutting the thoracic vertebra. The carcass composition from heifers was estimated by an equation composed of two to four parameters (R**2=96.15%, 90.98%, 93.60% and 88.22%, respectively). The parameters for the estimation of the muscle and fat weight, and muscle and fat ratio are very similar. Furthermore, the equations using the parameters could estimate the carcass composition from the Japanese Black x Limousin cattle resource population.
ISSN:1344-3941
1740-0929
DOI:10.1111/j.1740-0929.2007.00477.x