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Using ultrasound for the estimation of carcass characteristics in crossbreed (Bos taurus / Bos indicus) bulls

Julio Cesar Vinay Vadillo1, Benjamín Alfredo Piña Cárdenas1, Gwendolyne Peraza-Mercado2 and y Jorge Hernández Bautista3

1Campo Experimental La Posta. Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Km 22.5 Carretera Federal Veracruz- Córdoba. Paso del Toro, Medellín .Veracruz. México CP. 94277; 2Universidad Autónoma de Ciudad Juárez, Departamento de Ciencias Químico Biológicas. Av. Plutarco Elías Calles No. 1210, FOVISSSTE Chamizal, Ciudad Juárez, Chihuahua, México, C.P. 31210; 3Escuela de Medicina Veterinaria y Zootecnia. Universidad Autónoma Benito Juárez de Oaxaca. Av. Universidad s/n, Ciudad Universitaria. Oaxaca, Oaxaca. México. CP. 68120.


The objective of this research was to determine the rib eye area (REA) and back fat thickness (BFT) between the 12th and 13th rib, using real-time ultrasound for estimating the yield of total meat produced (YTMP), total meat produced (TMP), yield grade (YG), adjusted yield grade (AYG) and commercial cuts (CC) in a dual-purpose grazing bulls in the tropic to obtain an equation to estimate the hot carcass weight (HCW). Thirty-seven crossbred Holstein/Zebu (Ho/Z) and Brown Swiss/Zebu (BS/Z) bulls were subjected to ultrasound images prior to slaughter at the time when their weight was between 300 and 500 kg. Mean REA and BFT were 76.02 cm2 and 3.6 mm respectively in comparison to 77.38 cm2 (REA) and 4.0 mm (BFT) in the ultrasound. The TMP estimated by ultrasound scan did not differ between genotypes and at different slaughter weights. YTMP was better (P<0.05) for animals over 450 kg. The YG value was close to 1.0 with 52-54% of CC without significant effect on genetic group and slaughter weight. AYG values of 2 and 50-52% of CC was obtained. With the developed prediction equation HCW (kg) = - 338 + 2.48 carcass length +2.30 carcass width + 2.79 leg depth) r2 = 0.92 and the goodness of fit test was assessed with χ2 without significant difference (P>0.05). The results indicated that ultrasound image may give an estimate of rib eye area (UREA) and back fat thickness (UBFT).

Keywords: Rib eye area; back fat thickness; total meat produced; yield grade
To cite this article: Julio Cesar Vinay Vadillo, Benjamín Alfredo Piña Cárdenas, Gwendolyne Peraza-Mercado and Jorge Hernández Bautista, 2014. Using ultrasound for the estimation of carcass characteristics in crossbreed (Bos Taurus / Bos indicus) bulls. Res. Opin. Anim. Vet. Sci., 4(12): 639-643.

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