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

N. R. Lambe*, J. D. Wood, K. A. McLean, G. A. Walling, H. Whitney, S. Jagger, P. Fullarton, J. Bayntun, L. Bünger

*Corresponding author for this work

    Research output: Contribution to journalArticle (Academic Journal)peer-review

    18 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-measured muscle 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 less muscle, from 85. kg onwards. Although fat levels differed depending on diet regime (LP2 > others), proportions of fat in different body depots were unaffected.

    Original languageEnglish
    Pages (from-to)129-136
    Number of pages8
    JournalMeat Science
    Volume95
    Issue number1
    DOIs
    Publication statusPublished - 1 Sep 2013

    Keywords

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

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