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 language | English |
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Pages (from-to) | 129 - 136 |
Number of pages | 8 |
Journal | Meat Science |
Volume | 95 |
DOIs | |
Publication status | Print publication - Sept 2013 |
Bibliographical note
1025128Keywords
- CT scanning
- Carcass composition
- Diet
- Fat
- Pig