Body Composition: Indirect Measurement

Scholz, Armin M.; Mitchell, A. D.

doi:10.1081/e-eas2-120045710

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…In addition to the amounts of soft lean or fat tissue and bone mineral content, DXA also provides a measure of bone mineral density (g/cm 2 ). The DXA has been applied on a variety of farm animal (chicken: Swennen et al, 2004;Schreiweis et al, 2005;pigs: Mitchell et al, 1996;Kremer et al, 2012;sheep: Rozeboom et al, 1998;Mitchell, 2010 andcalves: Scholz et al, 2003) to predicting carcass and body composition. Also, previous studies evaluating DXA measurements in pigs have demonstrated high degrees of precision when compared to chemically-determined values (Brunton et al, 1993;Mitchell et al, 1998).…”

Section: A) Visual Image Analysis By Monitoringmentioning

confidence: 99%

Imaging technologies to study the composition of live pigs: A review

Carabús¹,

Gispert²,

Font-i-Furnols³

2016

Span. j. agric. res.

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Image techniques are increasingly being applied to livestock animals. This paper overviews recent advances in image processing analysis for live pigs, including ultrasound, visual image analysis by monitoring, dual-energy X-ray absorptiometry, magnetic resonance imaging and computed tomography. The methodology for live pigs evaluation, advantages and disadvantages of different devices, the variables and measurements analysed, the predictions obtained using these measurements and their accuracy are discussed in the present paper. Utilities of these technologies for livestock purposes are also reviewed. Computed tomography and magnetic resonance imaging yield useful results for the estimation of the amount of fat and lean mass either in live pigs or in carcasses. Ultrasound is not sufficiently accurate when high precision in estimating pig body composition is necessary but can provide useful information in agriculture to classify pigs for breeding purposes or before slaughter. Improvements in factors, such as the speed of scanning, cost and image accuracy and processing, would advance the application of image processing technologies in livestock animals.

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Section: A) Visual Image Analysis By Monitoringmentioning

confidence: 99%

Imaging technologies to study the composition of live pigs: A review

Carabús¹,

Gispert²,

Font-i-Furnols³

2016

Span. j. agric. res.

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Relationships among dual-energy X-ray absorptiometry, bioelectrical impedance and ultrasound measurements of body composition of swine

Mitchell

Scholz

2009

Arch. Anim. Breed.

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In three separate studies (156 pigs total), dual-energy X-ray absorptiometry (DXA), bioelectrical impedance (BIA) and ultrasound were compared as methods for measuring live body composition of pigs at 60 and 100-110 kg BWt. DXA measured total body fat and lean content, BIA measurements of resistance (Rs) and reactance (Xc) were used to calculate total body lean mass and ultrasound measurements of backfat (BF) depth and longissimus muscle area (LMA) were used to calculate total carcass lean mass. Following the 100-110 kg measurements, the pigs were slaughtered and the half-carcass analyzed chemically for fat and water content. At 110 kg both DXA and ultrasound measurements were significantly correlated with the percentages of carcass fat and water, although correlations were higher for DXA. The correlations between DXA and BF measurements were higher at 110 kg than at 60 kg, whereas they were lower for DXA and LMA. For pigs measured at 100 kg there were high correlations between the DXA values and the BIA estimates for both percentage of fat-free lean mass (FFM %) and FFM kg. Furthermore, the correlations between the BIA estimates of FFM and carcass fat and water content were similar to those for DXA and the same carcass values. This study also provided a side-by-side comparison of the BIA and ultrasound lean measurements relative to DXA and carcass composition. The BIA lean measurement correlated more highly with both DXA and carcass composition than did the ultrasound lean measurement. Keywords

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Body Composition: Indirect Measurement

Cited by 2 publications

References 26 publications

Imaging technologies to study the composition of live pigs: A review

Imaging technologies to study the composition of live pigs: A review

Relationships among dual-energy X-ray absorptiometry, bioelectrical impedance and ultrasound measurements of body composition of swine

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