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.
- CT scanning
- Carcass composition
Lambe, NR., Wood, JD., McLean, KA., Walling, GA., Jagger, S., Fullarton, P., Bayntun, J., & Bunger, L. (2013). Effects of low protein diets on pigs with a lean genotype 2. Compositional traits measured with computed tomography (CT). Meat Science, 95, 129 - 136. https://doi.org/10.1016/j.meatsci.2013.04.038