J. Anim Sci.
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J. Anim Sci. 1983. 57:604-608.
© 1983 American Society of Animal Science
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Evaluation of Ground Carcass, Sawdust Residue and Specific Gravity Methods for Estimating Body Compostion of Reproducing Swine1 ,2,

R. G. Shields, Jr.3 and D. C. Mahan4

The Ohio Agricultural Research and Development Center and The Ohio State University, Wooster 44691

4 Reprint requests: Dept. of Anim. Sci., The Ohio Agr. Res. and Dev. Center, Wooster.

Abstract

Two methods for estimating carcass composition were evaluated using 64 swine in various reproductive states (nongravid, gravid, lactation). One technique involved chemical analysis of the sawdust residue following cross-sectional sawing of the carcass while the other utilized specific gravity measurements. Prediction equations were then developed relating these measurements to chemical components of the ground carcass and maternal body (ingesta-free body minus uterus, concepus and mammary tissue). Water, fat and protein estimations were determined with greater precision by sawdust residue than was ash. Component weights in the maternal body and carcass were closely related by age and(or) reproductive state, allowing accurate prediction of the composition of the maternal body directly from sawdust residue. Specific gravity did not appear to be as accurate an indicator of carcass nor maternal body composition in reproducing swine as the sawdust technique.

Footnotes

1 Approved for publication as Journal article 146-81 of the Ohio Agr. Res. and Dev. Center and the Ohio State Univ., Wooster.

2 Appreciation is expressed to T. Hartman, D. Hickman and P. Graham for help in data collection and to Dr. J. Holman for statistical analysis.

3 Present address: Farmland Industries, 103 West 26th Ave., North Kansas City, MO 64116.






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Copyright © 1983 by the American Society of Animal Science.