Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-03T08:15:52.479Z Has data issue: false hasContentIssue false
  • English
  • Français

Backfat studies in growing pigs 2. A comparison of ultrasound and ruler probe predictors of backfat and eye-muscle measurements in the live pig

Published online by Cambridge University Press:  02 September 2010

L. R. Giles ,
R. D. Murison  and
B. R. Wilson
L. R. Giles
Affiliation:
Department of Agriculture, Agricultural Research Centre, Wollongbar, New South Wales 2480, Australia
R. D. Murison
Affiliation:
Department of Agriculture, Agricultural Research Centre, Wollongbar, New South Wales 2480, Australia
B. R. Wilson
Affiliation:
Department of Agriculture, Agricultural Research Centre, Wollongbar, New South Wales 2480, Australia
Get access

Abstract

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 P2 backfat thickness on each of 96 pigs. The effect of operator experience was examined with the Sonatest and Scanoprobe machines. Scanogram measurements of P2 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 R2) than the Scanoprobe in predicting P2 backfat depth. Operator experience improved Scanoprobe precision but had little effect with the Sonatest. Ruler probe R2 was intermediate between the Sonatest and Scanoprobe.

3. The Scanogram was the most precise live P2 backfat measurement technique. R2 was not affected by method of pig restraint.

Type
Research Article
Information
Animal Production , Volume 32 , Issue 1 , February 1981 , pp. 47 - 50
Copyright
Copyright © British Society of Animal Science 1981

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Cook, G. L. and Cuthbertson, A. 1967. Comparison of echo-sounding machines and operators for measurement of performance test boars. Anim. Prod. 9: 278 (Abstr.).Google Scholar
Coombs, W. 1970. Ultrasonic and ruler probes as predictors of carcass backfat. Rep. 49th A. Feeders' Day Univ. Alberta, Edmonton.Google Scholar
East, E., Taylor, J., Miller, I. T. and Widdowson, R. W. 1959. Measurement of backfat thickness on live pigs by ultrasonics. Anim. Prod. 1: 129–134.Google Scholar
Giles, L. R., Murison, R. D. and Wilson, B. R. 1981. Backfat studies in growing pigs. 1. Influence of energy intake on growth and carcass measurements at varying live weights. Anim. Prod. 32: 39–46.Google Scholar
Gillis, W. A., Bowman, G. H., Greiger, H. and Rahnefeld, G. W. 1972. A comparison of ultrasonics with the ruler probe for the prediction of carcass yield in swine. Can. J. Anim. Sci. 52: 637–644.CrossRefGoogle Scholar
Hazel, L. N. and Kline, E. A. 1952. Mechanical measurement of fatness and carcass value on live hogs. J. Anim. Sci. 11: 313–318.CrossRefGoogle Scholar
Kempster, A. J. and Evans, D. G. 1979. A comparison of different predictors of the lean content of pig carcasses. 1. Predictors for use in commercial classification and grading. Anim. Prod. 28: 87–96.Google Scholar
Stouffer, J. R., Wallentine, M. V., Wellington, G. H. and Diekmann, A. 1961. Development and application of ultrasonic methods for measuring fat thickness and rib-eye area in cattle and hogs. J. Anim. Sci. 20: 759–767.CrossRefGoogle Scholar
Tulloh, N. M., Truscott, T. G. and Lang, C. P. 1973. An Evaluation of the Scanogram for Predicting the Carcass Composition of Live Cattle. University of Melbourne. (Mimeograph).Google Scholar
Webb, A. J. 1975. A note on the repeatability of ultrasonic backfat measurements in pigs. Anim. Prod. 20: 433–436.CrossRefGoogle Scholar
Wilson, B. R. 1976. The proposed national pig carcass measurement and information service. Proc. Symp. Carcass Classification, Aust. Meat Bd, Adelaide.Google Scholar
Wilson, B. R. and Todd, A. C. E. 1979. The Australian Pig Carcass Competition Judging System. Department of Agriculture, Melbourne (Mimeograph).Google Scholar