Ultrasonography as a predicting tool for carcass traits of young bulls

Scientia Agricola

Liliane Suguisawa¹  Wilson Roberto Soares Mattos¹  Henrique Nunes De Oliveira²  Antônio Carlos Silveira²  Mário De Beni Arrigoni²  Cláudio Maluf Haddad¹  Luis Artur Loyola Chardulo²  Cyntia Ludovico Martins² 

[1] ,Universidade de São Paulo Escola Superior de Agricultura Luíz de Queiróz Departamento de ZootecniaPiracicaba SP ,Brasil

关键词: beef cattle;    ribeye area;    fat thickness;    growth;    cross breeds;    bovinos de corte;    área de olho-de-lombo;    gordura subcutânea;    crescimento;    grupos genéticos;   

DOI  :  10.1590/S0103-90162003000400026

来源: SciELO

【 摘 要 】

Considerable resources have been allocated to support research in the development of non-invasive and non-destructive techniques for carcass composition and quality evaluation. Ultrasonography is a reliable and relatively low-cost technique that can be used. In the present study, real-time ultrasonography was used to predict ribeye area (REA) and subcutaneous fat thickness (FT) in live animals as compared to carcass measurements. Animals used were 115 yearling bull calves (initial body weight, 329 kg), kept under feedlot conditions, of four genetic groups (30, ½ Angus x Nellore; 30, ½ Canchim x Nellore; 30, ½ Simmental x Nellore, and 25 Nellore), and two finishing frame sizes (small and large). Four ultrasonographic measurements were taken every 28 days until slaughter. Predictive precision of ultrasonographic measurements increased as animals approached slaughter, reaching maximum values at the last measurement (R²=0.68 and 0.82 for REA and FT, respectively). FT carcass measurements was influenced by genetic group and live measurements (P < 0.05). Frame size did not influence REA and FT, probably due to small, but distinctive differences among genetic groups.

【 授权许可】

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