HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by De Wilde, R. O. Articles by Lauwers, H. Search for Related Content PubMed PubMed Citation Articles by De Wilde, R. O. Articles by Lauwers, H.

The Effect of Parenteral Use of Estradiol, Progesterone, Testosterone and Trenbolone on Growth and Carcass Composition in Pigs¹

State University of Ghent, Belgium

Abstract

One hundred sixty-two Belgian Land race pigs were fed ad libitum from 20 to 100 kg in individual pens (Exp. 1 and 2) or in group pens (Exp. 3). Boars were implanted in the range of 54 to 61 kg live weight with either estradiol-17ß + progesterone (Exp. 1) or estradiol-17ß + trenbolone (Exp. 2 and 3); barrows were treated in the same weight interval with either estradiol-17ß + trenbolone (Exp. 1) or estradiol-17ß + testosterone (Exp. 2); gilts received either estradiol-17ß + testosterone at 60 kg (Exp. 1) or estradiol-17ß + trenbolone at 57 kg (Exp. 2) and at 51 kg (Exp. 3). Growth performances and carcass characteristics were recorded. Carcass composition was evaluated by chemical analysis of the carcass (Exp. 1) or of the loin (Exp. 2). Regardless of sex of the pig, all hormone treatments adversely affected growth rate of the pigs, except that of gilts of Exp. 1 which had an improved rate of growth (P<.05). There was a concomitant reduction of the voluntary feed intake in the cases of growth depression. The feed:gain ratio in this period was only improved (P<.01) in the barrows of Exp. 1. The most striking feature concerned the carcass composition, which became leaner in all treated animals except for the boars in Exp. 1, where the carcass composition was unaffected by treatment.

¹ Financially supported by IWONL Brussels. The technical assistance of Mr. E. Maes and Mr. H. Derycke and the statistical advise of Mr. N. Vanrolleghem and Mr. H. Denoo are gratefully acknowledged.

² Dept. Anim. Nutr., Heidestraat 19, B 9220 Merelbeke.

³ Dept. Vet. Anat., Casinoplein 24, B 9000 Ghent.

This article has been cited by other articles:

				J. M. Bender, M. T. See, D. J. Hanson, T. E. Lawrence, and J. P. Cassady Correlated responses in growth, carcass, and meat quality traits to divergent selection for testosterone production in pigs J Anim Sci, June 1, 2006; 84(6): 1331 - 1337. [Abstract] [Full Text] [PDF]