Correlation of ultrasonic measured ribeye area and fat thickness to the certain traits measured on slaughtered bulls (Short Communication)

M Török,V Farkas,F Szabó,J P Polgár,G Kocsi

doi:10.5194/aab-52-23-2009

Abstract

Abstract. The aim of this study was to test accuracy of measurements done by Falco 100 (Pie Medical) ultrasonic equipment. 10 Angus, 10 Hungarian Simmental, 10 Limousin and 10 Charolais fattening bulls were measured at the feedlot just before slaughtering. Fat thickness at the rump (P8) and ribeye area (REA) were realized from each animal. After slaughtering, the data of slaughter and carcass weights were collected and carcasses were judged on the base of EUROP system. The database was examined by SPSS 9.0 for Windows. Average liveweight of Angus was 645 ± 41.5 kg, of Hungarian Simmental was 676 ± 41.8 kg, of Limousin was 655 ± 50.8 kg and of Charolais was 694 ± 42.3 kg at the measurement. REA measured with ultrasound was 102.9 ± 8.9 cm2, 102.7 ± 10.4 cm2, 111.2 ± 9.6 cm2 and 106.4 ± 9.5 cm2, respectively. P8 was 1.05 ± 0.28 cm, 0.62 ± 0.13 cm, 0.62 ± 0.09 and 0.61 ± 0.18 cm, respectively. Correlation between ultrasonic and carcass REA in case of mentioned breeds was 0.74, 0.74, 0.94 and 0.80. Correlation between P8 and EUROP fat score was 0.51, 0.73, 0.56 and 0.28, respectively. Overall correlation between ultrasonic and carcass REA was 0.83 (P≤0.01), and between P8 and EUROP fat score was 0.69 (P≤0.01).

Highlights

New methods such as ultrasonic technics for the measurement of the body composition in vivo need to be evaluated before routine use in livestock research or performance testing (SCHOLZ & FÖRSTER 2006).KALLWEIT et al (1994) reported that magnetic resonance imaging (MRI) is an excellent non invasive method to study morphological structures in live animals and these estimation results can serve as a reference for other evaluation methods
10 Angus, 10 Hungarian Simmental, 10 Limousin and 10 Charolais fattening bulls were measured at the feedlot just before slaughtering
ribeye area (REA) measured with ultrasound was 102.9 ± 8.9 cm2, 102.7 ± 10.4 cm2, 111.2 ± 9.6 cm2 and 106.4 ± 9.5 cm2, respectively

Summary

Introduction

KALLWEIT et al (1994) reported that magnetic resonance imaging (MRI) is an excellent non invasive method to study morphological structures in live animals and these estimation results can serve as a reference for other evaluation methods. WILD (1950) was the first who described that A-Mode ultrasound can be used for investigating live fat and muscle tissues of animals. He found that ultrasound is non destructive and humane. Real-time ultrasound is a specialized version of B-Mode ultrasound-producing images almost instantaneously thereby creating »live«, moving objects (GRESHAM 2004). An other specialized version of ultrasound is VOS used mainly in France (TŐZSÉR et al 2001)

Objectives

Methods

Results