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Estimation of the carcass composition from a cross‐section of the rib‐loin from crossbred Japanese Black × Limousin F2 cattle by computer image analysis
Author(s) -
NADE Toshihiro,
SABURI Junichi,
ABE Tsuyosi,
NAKAGAWA Tetsuo,
OKUMURA Toshiaki,
MISUMI Satsuki,
SAITO Kunihiko,
KAWAMURA Tadashi,
FUJITA Kazuhisa
Publication year - 2007
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/j.1740-0929.2007.00477.x
Subject(s) - loin , crossbreed , carcass weight , zoology , composition (language) , mathematics , anatomy , vertebra , thoracic vertebrae , population , biology , veterinary medicine , body weight , medicine , endocrinology , lumbar vertebrae , linguistics , philosophy , environmental health , lumbar
The carcass composition of crossbred Japanese Black × 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 × Limousin cattle resource population.