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Effect of oestradiol-17β on energy metabolism of steers fed roughage diets

Published online by Cambridge University Press:  27 March 2009

R. A. Hunter  and
J. E. Vercoe
R. A. Hunter
Affiliation:
CSIRO, Division of Tropical Animal Science, Tropical Cattle Research Centre, North Rockhampton, Queensland, 4702 Australia
J. E. Vercoe
Affiliation:
CSIRO, Division of Tropical Animal Science, Tropical Cattle Research Centre, North Rockhampton, Queensland, 4702 Australia
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Extract

In many areas of the world grazing cattle lose weight for part of the year because the dry standing pasture on offer is of poor quality and animals are unable to eat enough to meet their maintenance energy requirements. In countries where growth promoting anabolic agents are used, a perod of liveweight loss may coincide with the functional life of an implanted agent. There is evidence to suggest that diethylstilboestrol, a xenobiotic with oestrogenic activity, may increase maintenance energy requirements (Rumsey, Tyrrell & Moe, 1980). This has the effect of increasing the rate of live-weight loss under restricted submaintenance feeding conditions (Oltjen et al. 1973). One of the most common anabolic agents currently in use is the naturally occurring oestrogen, oestradiol-17β. However, its effects on energy requirements of animals either gaining or losing weight are unknown.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 111 , Issue 1 , August 1988 , pp. 187 - 190
Copyright
Copyright © Cambridge University Press 1988

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