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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

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