J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Swantek, P. M.
Right arrow Articles by Crenshaw, J. D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Swantek, P. M.
Right arrow Articles by Crenshaw, J. D.

Journal of Animal Science, Vol 77, Issue 4 893-897, Copyright © 1999 by American Society of Animal Science

JOURNAL ARTICLE

Prediction of fat-free mass of pigs from 50 to 130 kilograms live weight

P. M. Swantek, M. J. Marchello, J. E. Tilton and J. D. Crenshaw
Animal and Range Sciences Department, North Dakota State University, Fargo 58105, USA.

Seventy-two Duroc x Hampshire x Yorkshire pigs were used to evaluate bioelectrical impedance procedures to predict fat-free mass of live pigs. Pigs were allotted by sex, ancestry, and weight. Pigs (12 gilts and 12 barrows) averaging 50+/-2.4 kg were slaughtered to establish a baseline for body composition. A pen of six gilts and a pen of six barrows were randomly selected for slaughter when the pen averaged either 70, 90, 110, or 130 kg. Pigs were weighed, then a four-terminal plethysmograph was used to measure resistance (omega) and reactance (omega), and length (cm) was measured between detector terminals. Pigs were slaughtered 12 h later, and carcasses were chilled for 24 h. The right side was ground twice and mixed and samples were frozen for later analyses of fat content. Actual fat-free mass (ActFFM) was determined from the weights and percentage of fat. Predicted fat-free mass (PredFFM) was calculated using the following equation: Pred FFM = .486 (live weight) - .881 (resistance) + .48 (length) + .86 (reactance) + 7.959. The correlation coefficients between ActFFM and PredFFM ranged from .66 to .91 overall. Correlation coefficients approximating slaughter weight (90 kg) were .94 (P < .02). Fat-free mass was underestimated by the prediction equation at all slaughter weights, but the predicted fat-free mass was highly correlated to the actual fat-free mass, except for the 110-kg gilts (r = .68, P = .15) and the 130-kg barrows (r = .65, P = .16). The data support the use of bioelectrical impedance to measure fat-free mass over a wide range of weights for finishing pigs.


This article has been cited by other articles:


Home page
 J ANIM SCIHome page
K. W. Ssu, M. C. Brumm, and P. S. Miller
Effect of feather meal on barrow performance
J Anim Sci, September 1, 2004; 82(9): 2588 - 2595.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
M. Altmann, U. Pliquett, R. Suess, and E. von Borell
Prediction of lamb carcass composition by impedance spectroscopy
J Anim Sci, March 1, 2004; 82(3): 816 - 825.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1999 by the American Society of Animal Science.