Evaluation of ultrasonic estimates of carcass fat thickness and longissimus muscle area in beef cattle

Perkins, Tommy L; Green, R D; Hamlin, K E

doi:10.2527/1992.7041002x

Cited by 118 publications

(83 citation statements)

References 4 publications

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“…A média da EDEV indicou diferença absoluta média de 0,34 mm entre a EGSUS e EGSC. Esse valor é inferior aos resultados obtidos por Duello (1992), Perkins et al(1992b), Charagu et al (2000 e Greiner et al (2003), de 2,3; 1,9; 2,2 e 1,38 mm, respectivamente.…”

Section: Resultsunclassified

Relação entre medidas ultra-sônicas e espessura de gordura subcutânea ou área de olho de lombo na carcaça em bovinos de corte

Tarouco¹,

Lobato

Tarouco³

et al. 2005

R. Bras. Zootec.

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RESUMO -Foram utilizados 162 animais, avaliados em dois anos para determinar a exatidão do ultra-som em estimar a espessura de gordura subcutânea (EGSC) e a área do músculo Longissimus (AOLC) no sítio anatômico entre a 12ª e 13ª costelas. Dentro de 24 horas antes do abate, foram mensuradas por ultra-som a espessura de gordura subcutânea (EGSUS) e a área de músculo Longissimus (AOLUS). Os coeficientes de correlação simples entre as características medidas por ultra-som e a espessura de gordura subcutânea e área do músculo Longissimus da carcaça foram de 0,95 e 0,97, respectivamente. Diferenças entre medidas ultra-sônicas e da carcaça foram expressas em base atual (EDIFF e ADIFF) e em base absoluta (EDEV e ADEV) para espessura de gordura e área do músculo Longissimus, respectivamente. As médias da EDIFF e ADIFF indicaram que o ultra-som superestima a EGSC em 0,16 mm e subestima a AOLC em 0,26 cm² considerandose ambos os anos. As médias globais da EDEV e ADEV, que são indicações da taxa média de erro, foram 0,34 mm e 1,28 cm², respectivamente. A análise do efeito do ano revelou que EDIFF foi maior no ano 1 e que ADIFF foi maior no ano 2. A análise da EDIFF indicou que animais com EGSC <2 mm foram superestimados e com EGSC >4 mm serem subestimados pelo ultra-som. Similarmente, houve tendência de animais com AOLC <50 cm² foram superestimados e com áreas >50 cm² foram subestimados por ultra-som. Os erros-padrão de predição ajustados para viés das medidas ultra-sônicas foram de 0,40 mm para espessura de gordura subcutânea e de 1,66 cm² para área do músculo Longissimus. Estes resultados indicam que o ultra-som pode ser um estimador acurado das características de carcaça em bovinos de corte. Palavras-chave: composição corporal, exatidão, ultra-som Relationship between Ultrasound Measurements and Fat Thickness or Rib Eye Area inCarcass of Beef Cattle ABSTRACT -One hundred sixty-two animals were used during a 2-year period to evaluate the accuracy of ultrasound measurements to estimate carcass subcutaneous fat thickness (CFAT) and area of Longissimus muscle located between the 12 th and 13 th ribs (CLMA). Twenty-four hours before slaughter animals were ultrasonically measured to determine subcutaneous fat thickness (UFAT) and area of Longissimus muscle (ULMA). The correlation coefficients between ultrasound measurements and CFAT and CLMA were 0.95 and 0.97, respectively. Differences between ultrasonic and carcass measurements were expressed in actual (FDIFF and RDIFF) and absolute (FDEV and RDEV) basis. Means of FDIFF and RDIFF in both years indicated that ultrasound overestimated CFAT by 0,16 mm and underestimated CLMA by 0.26 cm². Overall means of FDEV and RDEV were 0,34 mm and 1.28 cm², respectively. Analysis of year effects showed that FDIFF was greater in year 1 while RDIFF was higher in year 2. FDIFF indicated that ultrasound measurements overestimated CFAT in animals with <2 mm CFAT and underestimated CFAT in those with >4 mm CFAT. Similarly, animals with CLMA <50 cm² were overestimated while those with CLMA >50 cm²...

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Section: Resultsunclassified

Relação entre medidas ultra-sônicas e espessura de gordura subcutânea ou área de olho de lombo na carcaça em bovinos de corte

Tarouco¹,

Lobato

Tarouco³

et al. 2005

R. Bras. Zootec.

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“…However, genetic evaluation for these attributes in breeding animals is generally difficult and expensive. Use of real-time ultrasound scanning for eye muscle area and fat thickness as a predictor of saleable beef yield is an effective tool for genetic evaluation of carcass quantity in young animals (Perkins et al 1992;Robinson et al 1993;Bergen et al 1996;Moser et al 1998). Ultrasonography is also potentially useful for genetic evaluation of intramuscular fat (marbling) in young animals, particularly in heifers or steer half-sibs (Wilson et al 1998).…”

Section: Genetic Markers For Carcass and Beef Quality Attributesmentioning

confidence: 99%

Quantitative and molecular genetic influences on properties of beef: a review

Burrow¹,

Moore²,

Johnston³

et al. 2001

Aust. J. Exp. Agric.

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Abstract. The scientific literature is reviewed to identify quantitative and molecular genetic influences on quantity and quality of beef. Genetic variation between breeds is of similar magnitude to genetic variation within breeds for many economically important traits. Differences between breeds are significant and large for most carcass and beef quality attributes, including beef tenderness, although differences for sensory juiciness and flavour are of little practical importance. For traits such as beef tenderness, between-breed differences may be more easily exploited than within-breed differences, because exceptional breeds are easier to identify than exceptional animals. Effects of heterosis on carcass and beef quality attributes are relatively small (3% or less), with most effects mediated through heterotic effects on weight. Carcass composition traits (e.g. carcass weight, fat thickness and marbling) are moderately to highly heritable. Most estimates of retail beef yield percentage are highly heritable, offering good potential for within-breed selection for the trait, although a moderate to strong antagonistic relationship exists between yield and marbling. This relationship needs to be considered in within-breed selection programs for yield percentage. Early estimates of heritability of objective measures of beef tenderness (Warner Bratzler shear force values) indicated tenderness was moderately to highly heritable. Recent estimates using larger numbers of carcasses and more discriminatory methods of analysis indicate that beef tenderness is lowly heritable in Bos taurus breeds and moderately heritable in Bos indicus and Bos indicus-derived breeds. Within breeds, measures of 24-h calpastatin activity are genetically strongly correlated with shear force values but are more heritable. However, phenotypic correlations between shear force values and 24-h calpastatin activities are low. There are also inconsistencies in relationships between these measurements across breeds. Low correlations between tenderness in different muscles, low to moderate heritabilities and inconsistent variation within-and between-breeds for traits such as 24-h calpastatin activity suggest that genetic improvement in beef tenderness may be difficult. The possibility exists that significant mitochondrial genetic effects occur for some carcass and beef quality attributes. A major gene for muscular hypertrophy in cattle significantly affects carcass and beef quality characteristics. Genome-wide screening of DNA markers indicates a number of putative Quantitative Trait Loci (QTL) associated with carcass and meat quality characteristics. Published data for these QTL are summarised. Strategies to combine quantitative and molecular genetic information to maximise genetic progress are discussed.

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“…Many researchers reported that accuracy of ultrasonic measured subcutan fat thickness and REA is quite good (BRETHOUR 1990, DUELLO et al 1990, SMITH et al 1992, PERKINS et al 1992a, PERKINS et al 1992b, WALDNER et al 1992, BRETHOUR 1992, ROBINSON 1992, RÖSLER et al 1996, MAY et al 2000, GREINER et al 2003. HARTJEN et al (1993) investigated a total of 648 young bulls of different breeds just before slaughter.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2009

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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 cm 2 , 102.7 ± 10.4 cm 2 , 111.2 ± 9.6 cm 2 and 106.4 ± 9.5 cm 2 , 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).Keywords: bulls, ultrasound, accuracy, ribeye area, fat thickness ZusammenfassungBeziehungen zwischen Ultraschallmessdaten der Rückenmuskelfläche und Rücken-fettdicke zu Schlachtergebnissen von Mastbullen (Kurzmitteilung) Das ZieI der Untersuchung war die Prüfung der Genauigkeit des Ultraschallgerätes Falco 100 (Pie Medical). Unmittelbar vor der Schlachtung von je 10 Mastbullen der Rassen Angus, Ungarisches Fleckvieh, Limousin und Charolais erfolgte die Ultraschallmessung der Rückenfettdicke (P8) sowie der Rückenmuskelfläche (REA). Nach der Schlachtung wurden die Schlachtausbeute, das Hälftengewicht, die EUROP Fleischigkeits-und Fettgewebeklasse sowie die am Schlachtkörper dem Ultraschall vergleichbaren Messdaten festgestellt und mit dem Programmpaket SPSS 9.0 für Windows ausgewertet.Zum Zeitpunkt der Messung und Schlachtung betrugen die Lebendgewichte der Bullen: Angus = 645 ± 41,5 kg, Ungarisches Fleckvieh = 676 ± 41,8 kg, Limousin = 655 ± 50,8 kg und Charolais = 694 ± 42,3 kg. ln der genannten Reihenfolge der Rassen wurden folgende Ultraschallmesswerte für die Rückenmuskelfläche 102,9 ± 8,9 cm 2 , 102,7 ± 10,4 cm 2 , 111,2 ± 9,6 cm 2 und 106,4 ± 9,5 cm 2 ermittelt bzw. für die Rückenfettdicke von 1,05 ± 0,28 cm,

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Evaluation of ultrasonic estimates of carcass fat thickness and longissimus muscle area in beef cattle

Cited by 118 publications

References 4 publications

Relação entre medidas ultra-sônicas e espessura de gordura subcutânea ou área de olho de lombo na carcaça em bovinos de corte

Relação entre medidas ultra-sônicas e espessura de gordura subcutânea ou área de olho de lombo na carcaça em bovinos de corte

Quantitative and molecular genetic influences on properties of beef: a review

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

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