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Volume 55, issue 1
Arch. Anim. Breed., 55, 64–71, 2012
https://doi.org/10.5194/aab-55-64-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 55, 64–71, 2012
https://doi.org/10.5194/aab-55-64-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Oct 2012

10 Oct 2012

Measurement of changes in body composition of piglets from birth to 4 kg using quantitative magnetic resonance (QMR)*

A. D. Mitchell1, T. G. Ramsay1, and A. M. Scholz2 A. D. Mitchell et al.
  • 1Agricultural Research Service, U.S. Department of Agriculture, Beltsville, MD, USA
  • 2Livestock Center, University Munich, Oberschleißheim, Germany

Abstract. The purpose of this study was to use quantitative magnetic resonance (QMR) to measure changes in the body composition of piglets during growth from birth to 4 kg body weight. Using QMR, 60 pigs were scanned an average of 5 times starting at 2.7±1.3 days of age (1.95 kg) and finally at 13.1±4.3 days (4.14 kg). Regression analysis revealed that the rates of total body growth and fat and lean deposition were linear throughout this period. Subsequently, a second group of 235 pigs (109 males and 126 females) were scanned twice, first at 2.7±1.2 days of age and then at 13.4±3.1 days of age. The mean (±SD) rate of total body growth was 230±57 g/day. The rates of fat and lean deposition were 40±13 g/day and 191±52 g/day, respectively. The rates of both fat and lean deposition were highly correlated (P<0.001) with total body growth rate (R2=0.81 and 0.93, respectively) and the coefficient of determination between the rates of fat and lean deposition was 0.71 (P<0.001). The results of this study demonstrate that QMR is a useful method for measuring changes in body composition in neonatal pigs. Furthermore, the results indicate that during the period of growth from birth to 4 kg, the rates of both fat and lean deposition are linear and highly correlated with total body growth.

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