Article
Effects of ractopamine on performance and composition of pigs phenotypically sorted into fat and lean groups.
Journal of animal science - 1 Jun 2005
Mimbs K J, Pringle T D, Azain M J, Meers S A, Armstrong T A
Abstract excerpt
Crossbred barrows (n = 144; 80 kg) from four farrowing groups were phenotypically selected into fat (FAT) and lean (LEAN) pens using ultrasound. The difference in 10th-rib fat depth between the LEAN and FAT groups was > or =0.5 cm. Within a farrowing group, pigs were assigned to pens (five pigs per pen and eight pens per phenotype) to equalize pen weight and fat depth. Pigs were fed a corn-soybean meal diet...
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