Effects of low protein diets on pigs with a lean genotype 2. Compositional traits measured with computed tomography (CT)

NR Lambe, JD Wood, KA McLean, GA Walling, S Jagger, P Fullarton, J Bayntun, L Bunger

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The effects on compositional changes across the growing-finishing period (40–115 kg) of feeding pig diets with different protein and amino acid levels were investigated using CT scanning (at 60, 85 and 115 kg live weight). Pigs of a lean commercial genotype were fed a commercial control regime (C), or a low protein regime with either high (LP1) or low (LP2) essential amino acid levels, all balanced for net energy. In vivo CT measurements agreed well with post-slaughter sample joint dissection results for carcass tissue weights/proportions, and CT-measuredmuscle density predicted intramuscular fat accurately. Pigs on C and LP1 regimes did not differ significantly in composition during growth. However, pigs on the LP2 regime had significantly more fat (in carcass, internal and intra-muscular depots) and lessmuscle, from85 kg onwards. Although fat levels differed depending on diet regime (LP2 > others), proportions of fat in different body depots were unaffected. © 2013 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)129 - 136
Number of pages8
JournalMeat Science
Volume95
DOIs
Publication statusPrint publication - Sep 2013

Bibliographical note

1025128

Keywords

  • CT scanning
  • Carcass composition
  • Diet
  • Fat
  • Pig

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