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 Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Perry, T. W. Articles by Stob, M. Search for Related Content PubMed Articles by Perry, T. W. Articles by Stob, M.

The Effect of Various Levels of Orally Administered Methyl Testosterone on Growth and Carcass Composition of Swine¹

Purdue University Agricultural Experiment Station

Abstract

Growing and fattening hogs were fed an average of from 0 to 62 mg. of methyl testosterone per animal daily in a free-choice protein supplement in drylot from a starting weight of 51 lb. to a final weight of from 210 to 220 lb.

A daily intake of 27 mg. or more of methyl testosterone resulted in highly significant growth depression. However, it was in this range that decreased fat deposition was apparent as indicated by significantly less back fat thickness.

Even though free-choice consumption of protein supplement containing the graded levels of methyl testosterone was fairly constant, consumption of corn decreased as the level of methyl testosterone increased. The slower-gaining pigs consuming the higher levels of the hormone required less corn per unit of gain, but were less efficient in conversion of protein supplement, than pigs fed no hormone or than pigs fed either 9 or 17 mg. per day.

¹ Contribution from the Department of Animal Husbandry, Journal Paper No. 965 Purdue University, Agricultural Experiment Station, Lafayette, Indiana.