Backfat studies in growing pigs 2. A comparison of ultrasound and ruler probe predictors of backfat and eye-muscle measurements in the live pig
1981; Cambridge University Press; Volume: 32; Issue: 1 Linguagem: Inglês
10.1017/s0003356100024752
ISSN1748-748X
AutoresL. R. Giles, RD Murison, Brian Wilson,
Tópico(s)Meat and Animal Product Quality
ResumoABSTRACT 1. Three ultrasonic machines (Sonatest TE/6, Scanoprobe 731 and Scanogram 721) and the ruler probe were compared as techniques for estimating carcass introscope and caliper measurements of P 2 backfat thickness on each of 96 pigs. The effect of operator experience was examined with the Sonatest and Scanoprobe machines. Scanogram measurements of P 2 backfat and eye-muscle area were evaluated using two methods of restraint (crate and nose rope). 2. The Sonatest was judged to be more precise (increased R 2 ) than the Scanoprobe in predicting P 2 backfat depth. Operator experience improved Scanoprobe precision but had little effect with the Sonatest. Ruler probe R 2 was intermediate between the Sonatest and Scanoprobe. 3. The Scanogram was the most precise live P 2 backfat measurement technique. R 2 was not affected by method of pig restraint.
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