Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-03T05:27:33.713Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Forbes, J. M. (1974). Feeding in sheep modified by intraventriculnr estrudiol and progesterone. Physiology and Behaviour 12, 741–747.CrossRefGoogle Scholar
Galbraith, H. & Gekaghty, K. J. (1982). A note on the response of British Friesian steers to trenbolone acetate and hexoestrol, and to alternation in dietary energy intake. Animal Production 35, 277–280.Google Scholar
Hunter, R. A. & Vercoe, J. E. (1987). Reduction in energy requirements of steers fed on low-quality roughage diets using trenbolone acetate. British Journal of Nutrition 58, 477–483.CrossRefGoogle ScholarPubMed
Lobley, G. E., Connel, A., Mollison, G. S., Brewer, A., Harris, C. I., Buchan, V. & Galbraith, H. (1985). The effects of a combined implant of trenbolone acetate and oestradiol-17β on protein and energy metabolism in growing beef steers. British Journal of Nutrition 54, 681–694.CrossRefGoogle ScholarPubMed
Martinez, J. A., Buttery, P. J. & Pearson, J. T. (1984). The mode of action of anabolic agents; the effect of testosterone on muscle protein metabolism in the female rat. British Journal of Nutrition 52, 515–521.CrossRefGoogle ScholarPubMed
Oltjen, R. R., Swan, H., Rumsey, T. S., Bolt, D. J. & Weinland, B. T. (1973). Feedlot performance and blood plasma amino acid patterns in beef steers fed diethylstilbestrol under ad libitum, restricted and compensatory conditions. Journal of Nutrition 103, 1131–1137.CrossRefGoogle ScholarPubMed
Rumsey, T. S., Tyrell, H. F. & Moe, P. W. (1980). Effect of diethylstilbestrol and Synovex-S on fasting metabolism measurements of beef steers. Journal of Animal Science 50, 225–234.CrossRefGoogle Scholar
Stafford, S. J., Galbraith, H. & Topps, J. H. (1981). The effect of intake of metabolizable energy on the response of steers to implantation with Revalor. Animal Production 32, 378–379.Google Scholar
Weston, R. H. (1979). Feed intake regulation in the sheep. In Physiological and environmental limitations to wool growth (ed. Black, J. L. and Reis, P. J.), pp. 103–177. Armidale, Australia: University of New England Publishing Unit.Google Scholar