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


     

J. Anim Sci. 1985. 61:1454-1459.
© 1985 American Society of Animal Science
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 Google Scholar
Google Scholar
Right arrow Articles by Vandergrift, W. L.
Right arrow Articles by Seerley, R. W.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Vandergrift, W. L.
Right arrow Articles by Seerley, R. W.

Growth, Carcass Composition and Selected Hormone Concentrations of Restricted and Ad Libitum-Fed Pigs1

W. L. Vandergrift2, S. Q. Giraudo2, D. R. Campion3 and R. W. Seerley2

University of Georgia,2, Athens 30602 and U.S. Department of Agriculture,3, Athens 30613

Abstract

Two barrows and two gilts were selected from each of five different crossbred litters and allotted to either ad libitum- or restricted-fed treatments. Pigs fed at a level of 81% ad libitum intake grew slower (P<.05), had less tenth-rib backfat (P<.05), more percent muscle (P<.05), an increased growth hormone (GH) secretion in response to glucose challenge at 50 kg (P<.05) and decreased insulin secretion in response to glucose challenge at 50 and 100 kg (P<.05) than ad libitum fed pigs. Hormone secretion response was also significantly affected by weight, with growth hormone decreasing and insulin increasing as pigs grew from 50 to 100 kg. No sex effects of sex x treatment interactions were found for hormone response (P>.10). There were no differences between treatments in feed efficiency, total feed intake on test, loin eye area, dressing percentage, or carcass length (P>.10). Carcass composition of barrows and gilts was affected differently by restricted nutrient intake.

Footnotes

1 This research was supported by State and Hatch funds allocated to the Georgia Agr. Exp. Sta. The authors thank Nancy Church and Bennet Johnson for their technical assistance with the radioimmunoassays.

2 Dept. of Anim. and Dairy Sci.

3 Anim. Physiol. Res. Unit, USDA, ARS, Richard B. Russell Agr. Res. Center.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1985 by the American Society of Animal Science.