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The effect of trenbolone acetate and trenbolone acetate plus oestradiol-17β on wool growth

Published online by Cambridge University Press:  27 March 2009

P. I. Hynd  and
R. E. James
P. I. Hynd
Affiliation:
Department of Animal Sciences, University of Adelaide, Waite Agricultural Research Institute, Glen Osmond, S.A. 5064, Australia
R. E. James
Affiliation:
Hoechst Australia Ltd, St Kilda Road, Melbourne, Victoria, 3001, Australia
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Extract

There is currently considerable interest in the use of anabolic compounds to improve the efficiency of animal growth and to produce leaner carcasses. While the majority of work has centred on beef production, the growth performance of sheep is also improved (Galbraith & Topps, 1981). However, little is known of the effects of anabolic steroid hormone administration on wool growth. The few experiments which have been conducted indicate that exogenous oestrogens depress wool output (Slen & Connell, 1958) while exogenous testosterone has consistently enhanced both greasy and clean wool yields (Slen & Connell, 1958; Osborne, 1968; Southcott & Royal, 1971). Little is known, however, of the effects of the synthetic steroids on wool growth. Coehlo, Galbraith & Topps (1981) reported a reduction in wool per unit body weight in sheep implanted with trenbolone acetate and oestradiol-17β, suggesting lowered efficiency of wool growth. Similarly Yasin & Galbraith (1981) noted that trenbolone acetate, in combination with either oestradiol-17β or zeranol, reduced wool output per unit body weight. Neither of these trials attempted to isolate the effects of trenbolone acetate alone from those of the androgenplus-oestrogen combination.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 108 , Issue 2 , April 1987 , pp. 501 - 503
Copyright
Copyright © Cambridge University Press 1987

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References

Buttery, P. J. (1983). Hormonal control of protein deposition in animals. Proceedings of the Nutrition Society 42, 137–148.CrossRefGoogle ScholarPubMed
Coehlo, J. F. S., Galbraith, H. & Topps, J. H. (1981). The effect of a combination of trenbolone acetate and oestradiol-17β on growth performance and blood, carcass and body characteristics of wether lambs. Animal Production 32, 261–266.Google Scholar
Galbraith, H. & Topps, J. H. (1981). Effects of hormones on the growth and body composition of animals. Nutrition Abstracts and Reviews Series B 51, 521–540.Google Scholar
Osborne, W. B. (1968). The effect of testosterone on the components of fleece weight in merino wethers. Proceedings of the Australian Society of Animal Production 7, 407–412.Google Scholar
Slen, S. B. & Connell, R. (1958). Wool growth in sheep as affected by the administration of certain sex hormones. Canadian Journal of Animal Science 38, 38–47.CrossRefGoogle Scholar
Southcott, W. H. & Royal, W. M. (1971). Effect of implanted testosterone propionate on the growth and wool production of merino wethers. Australian Journal of Agricultural Research 22, 271–282.Google Scholar
Yasin, A. R. M. & Galbraith, H (1981). A note on the response of wether lambs to treatment with trenbolone acetate combined with oestradiol-17β or zeranol. Animal Production 32, 337–340.Google Scholar