J. Anim Sci.
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J. Anim Sci. 1972. 35:1166-1175.
© 1972 American Society of Animal Science
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Influence of Sex and Hormone Treatment on Performance and Carcass Composition of Swine1, 2,

R. F. Plimpton, Jr. and H. S. Teague

The Ohio State University, Columbus 43210 and Ohio Agricultural Research and Development Center, Wooster 44691

Abstract

Behavior, performance and body composition are influenced by secondary sexual development in swine. Many reports (Hammond and Murray, 1937; Bratzler et al., 1954; Bruner et al., 1958; Charette, 1961; Cahill et al., 1960; Teague, et al., 1964; Tribble et al., 1965) have identified differences in feedlot performance and carcass value related to sex or sex condition. The performance of barrows vs. gilts from 1,450 litters and six breeds, when fed under conditions at an evaluation station was summarized by Bruner and Swiger (1968). Gilts gained more slowly, were more efficient, yielded longer carcasses with less backfat, larger longissimus muscle areas and possessed a greater percent of lean cuts than littermate barrows.

Cahill et al. (1960), compared 74 littermate boars, barrows and gilts slaughtered at weights of 41, 68 and 95 kg (table 1). Boar carcasses were longer and significantly leaner than carcasses of littermate gilts and barrows and such differences in leanness were most obvious at a live weight of 95 kilograms.

Footnotes

1 Symposium paper presented at the 62nd Annual Meeting of ie A.S.A.S., Pennsylvania State University, August 2 to 6, 1970.

2 Approved for publication as Journal Article No. 93-71 by the Associate Director of the Ohio Agricultural Research and Development Center.






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Copyright © 1972 by the American Society of Animal Science.