Ultrasonic prediction of carcass merit in beef cattle: evaluation of technician effects on ultrasonic estimates of carcass fat thickness and longissimus muscle area

Perkins, Tommy L; Green, R. D.; Hamlin, K E; Shepard, Harold H.; Miller, M. F.

doi:10.2527/1992.7092758x

Cited by 66 publications

(83 citation statements)

References 11 publications

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“…Correlation coefficients of the relationship between ultrasound measure and organ mass in knots (0.792-0.928) are comparable with those found for swans (Cygnus olor, 0.929;Sears 1988), dippers (Cinclus cinclus, 0.859;Newton 1993), and canaries (Serinus canaria, 0.927;Newton 1993) and also with the range of the correlation coefficients between the ultrasound measure and fat thickness or muscle area in beef cattle (Perkins et al 1992;Herring et al 1994). Values obtained in plovers were substantially lower (0.118-0.820), however.…”

Section: Discussionsupporting

confidence: 57%

“…The three brands of equipment used in this study were equipped with different probes and screens, but repeatabilities generally were comparable (Table 2) and in the same range as found in previous studies (Perkins et al 1992;Herring et al 1994). However, while variation between equipment in the discrepancy between observed and predicted organ mass was small for pectoral muscles, when estimating stomach mass, the discrepancies appeared slightly higher for the Aloka equipment compared with Hitachi and Pie (Table 3).…”

Section: Sources Of Errormentioning

confidence: 59%

“…Variation between observers was not investigated here, but previous studies have suggested that observer effects decrease as observers gain more experience (Perkins et al 1992;Herring et al 1994). Furthermore, we expect that the experience required is specific for particular organ/species combinations.…”

Section: Sources Of Errormentioning

confidence: 99%

“…Today, ultrasound technique also involves ultrasonographic imaging, which has the major advantage that the "landscape" of the internal organs and skeleton is visible. Ultrasonographic measurements distress animals relatively little and are commonly used in humans and animals for diagnostic purposes (e.g., Grooters et al 1994;Lambertz et al 1995) and in the context of animal production (e.g., Perkins et al 1992;Herring et al 1994;Chiba 1995). Ultrasonography has been used in a few ecophysiological studies (e.g., Sears 1988;Newton 1993;Reimers et al 1993;Woodroffe 1995;Haefner et al 1996).…”

Section: Introductionmentioning

confidence: 99%

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Estimating Organ Size in Small Migrating Shorebirds with Ultrasonography: An Intercalibration Exercise

Dietz

Dekinga²,

Piersma³

et al. 1999

Physiological and Biochemical Zoology

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Organs, even of fully grown adult birds, mammals, and reptiles, may show substantial size changes in relation to specific performances. These changes are difficult to study, because measurements usually can only be obtained following the death of the animal. We explored the use of ultrasonographic imaging, a relatively simple noninvasive technique, to measure size of pectoral muscles and stomach in two small shorebird species (red knots Calidris canutus and golden plovers Pluvialis apricaria). Accuracy of ultrasound measurements in estimating organ mass in red knots was reasonably high. Depending on the equipment used, the error of individual measurements was 20%-25% for the pectoral muscles and 26%-44% for the stomach. In plovers the technique was less accurate, probably because of the low variability of the organs involved. Ultrasound scanning is particularly suited to measure rapidly changing organ sizes over short time intervals. We demonstrate this with an example in which changes in individuals in size of pectoral muscle and stomach were monitored in captive red knots following a change in diet. Ultrasound measures will enable studies on the links between body composition and future behavior and physiology.

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Section: Discussionsupporting

confidence: 57%

Section: Sources Of Errormentioning

confidence: 59%

Section: Sources Of Errormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Estimating Organ Size in Small Migrating Shorebirds with Ultrasonography: An Intercalibration Exercise

Dietz

Dekinga²,

Piersma³

et al. 1999

Physiological and Biochemical Zoology

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“…One reason for the lower correlations in the present study was the fact that eight separate batches of animals were used over a 2-year period, which is likely to result in lower correlations than when all records are taken at the same time. Perkins et al (1992) reported repeatabilities of ultrasonic estimates of carcass fat thickness and longissimus muscle area of 0.91 and 0.81, respectively, when repeated over 2 days. The corresponding values in the present study were 0.84 and 0.92 indicating that measurement of muscle size was better in the present study, whereas the lower repeatability for fat thickness may have been due to low subcutaneous fat depths making accurate measurement more difficult.…”

Section: Predictors Of Carcass Composition and Value In Steersmentioning

confidence: 96%

The relationship of live animal muscular and skeletal scores, ultrasound measurements and carcass classification scores with carcass composition and value in steers

Conroy

Drennan

Kenny

et al. 2009

Animal

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This study examined the relationship of muscular and skeletal scores and ultrasound measurements in the live animal, and carcass conformation and fat scores with carcass composition and value using 336 steers, slaughtered at 2 years of age. Live animal scores and measurements were recorded at 8 to 12 months of age and pre-slaughter. Following slaughter, each carcass was classified for conformation and fatness and the right side dissected into meat, fat and bone. Carcass conformation scores and fat scores were both measured on a continuous 15-point scale and ranged from 2.0 to 12.0 and from 2.8 to 13.3, respectively. Pre-slaughter muscular scores showed positive correlations ( P , 0.001) ranging from 0.31 to 0.86 with carcass meat proportion, proportion of high-value cuts in the carcass, conformation score and carcass value, significant negative correlations with carcass fat (r 5 20.13) and bone (r 5 20.81) proportions, and generally low non-significant relationships with the proportion of high-value cuts in meat and carcass fat score. Pre-slaughter ultrasound muscle depth and carcass conformation score showed similar correlations with carcass traits to those using the pre-slaughter muscular scoring procedure. Pre-slaughter ultrasound fat depth showed positive correlations ( P , 0.001) with carcass fat proportion (r 5 0.59) and fat score (r 5 0.63), and significant negative correlations (20.23 to 20.50) with carcass meat and bone proportions, high-value cuts in the carcass and in meat, and carcass value. Pre-slaughter skeletal scores generally showed poor correlations ranging from 20.38 to 0.52 with the various carcass traits. Corresponding correlations (20.26 to 0.44) involving records collected at 8 to 12 months of age were lower than those using pre-slaughter records. A one-unit increase in carcass conformation score increased carcass meat proportion and value by 11.2 g/kg and 5.6 cents/kg, respectively. Corresponding values for fat score were 28.2 g/kg and 25.1 cents/kg. In conclusion, both pre-slaughter live animal scores/measurements and carcass classification scores, explained an appreciable amount of the total variation in carcass meat, fat and bone proportions and carcass value, and a moderate amount of the variation in proportion of high-value meat cuts in the carcass.

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Effectiveness of using ultrasound readings to predict carcass traits and sensory quality in young bulls

Beriain

Insausti

Valera

et al. 2021

Computers and Electronics in Agriculture

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Ultrasonic prediction of carcass merit in beef cattle: evaluation of technician effects on ultrasonic estimates of carcass fat thickness and longissimus muscle area

Cited by 66 publications

References 11 publications

Estimating Organ Size in Small Migrating Shorebirds with Ultrasonography: An Intercalibration Exercise

Estimating Organ Size in Small Migrating Shorebirds with Ultrasonography: An Intercalibration Exercise

The relationship of live animal muscular and skeletal scores, ultrasound measurements and carcass classification scores with carcass composition and value in steers

Effectiveness of using ultrasound readings to predict carcass traits and sensory quality in young bulls

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