Hostname: page-component-745bb68f8f-g4j75 Total loading time: 0 Render date: 2025-01-31T03:02:44.256Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on the implantation of intensively-fed beef cattle with hexoestrol

Published online by Cambridge University Press:  02 September 2010

A. Macdearmid  and
T. R. Preston
A. Macdearmid
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
T. R. Preston
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
Get access

Summary

In the first of two experiments, steers which received a single implant of 60 mg hexoestrol grew 24% faster than non-implanted controls and 7% faster than steers given 30 mg. The growth rate of the steers given a single implant of 60 mg did not differ significantly from that of animals implanted twice with 30 mg or 5 times with 15 mg. In the second experiment, steers given 60 mg grew 23% faster than controls and their feed conversion efficiency was 13% better; the hexoestrol treatment resulted in a saving of 131 kg feed per animal. The tenth-rib joints of steers given 60 mg had a higher crude-protein content and lower fat content than those from non-implanted animals.

Type
Research Article
Information
Animal Production , Volume 11 , Issue 3 , August 1969 , pp. 419 - 422
Copyright
Copyright © British Society of Animal Science 1969

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

REFERENCES

Burroughs, W., and Zmolek, W. 1963. 62 questions about stilbestrol answered. Bull. St. Univ. Iowa, No. 1P33.Google Scholar
Chapman, H. L. Jr., Palmer, A. Z., Kidder, R. W., Carpenter, J. W. and Haines, C. E. 1964. Oral and implanted stilbestrol for beef cattle fattened on pasture and in drylot. Bull, agric. Exp. Stn, Fl. No. 666.Google Scholar
Clegg, M. T. and Cole, H. H. 1954. The action of stilbestrol on the growth response in ruminants. J. Anim. Sci. 13: 108–130.CrossRefGoogle Scholar
Melton, A. A. and Rigg, J. K. 1965. Response of steers to implantation of diethylstilbestrol during suckling, wintering and finishing periods. Bull. Agric. Exp. Stn, Texas and A. M. University, No. B1O35.Google Scholar
Peacock, F. M., Kirk, W. G., Hodges, E. M., Palmer, A. Z., and Carpenter, J. W. 1965. Influence of summer pasture, diethylstilbestrol, and shade on fattening cattle in South Florida. Bull. agric. Exp. Stn. Fl. No. 700.Google Scholar
Wallentine, M. V., Drain, J. J., Wellington, G. H. and Miller, J. J. 1961. Some effects on beef carcasses from feeding stilbestrol. J. Anim. Sci. 20: 792–795.CrossRefGoogle Scholar