Hostname: page-component-77c89778f8-fv566 Total loading time: 0 Render date: 2024-07-19T02:58:45.156Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of trenbolone on acetate growth, blood hormones and metabolites, and nitrogen balance of beef heifers

Published online by Cambridge University Press:  02 September 2010

H. Galbraith
H. Galbraith
Affiliation:
Division of Agricultural Chemistry and Biochemistry, North of Scotland College of Agriculture, 581 King Street, Aberdeen AB9 1UD
Get access

Abstract

Four animals from a group of eight Hereford × Friesian heifers weighing approximately 365 kg were implanted with 300 mg trenbolone acetate at the beginning of a 60-day trial period. Treated heifers grew more quickly (P<0·05) and converted food to liveweight gain more efficiently (P < 0·01) than untreated cdntrols. They had lower overall concentrations for serum albumin and plasma urea (P<0·01), the differences being maintained throughout the diurnal periods studied. No significant differences were recorded in the mean values for serum total protein, plasma glucose or free fatty acids. Similarly, the absence of significant differences in the mean values for serum growth hormone, insulin and prolactin suggested that these hormones did not mediate the response to trenbolone acetate. Implanted heifers had a significantly greater retention of nitrogen (P<0·01) which was mainly due to a reduction in the excretory products associated with total urinary nitrogen.

Type
Research Article
Information
Animal Production , Volume 30 , Issue 3 , June 1980 , pp. 389 - 394
Copyright
Copyright © British Society of Animal Science 1980

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

Buttery, P. J., Vernon, B. G. and Pearson, J. T. 1978. Anabolic agents—some thoughts on their mode of action. Proc. Nutr. Soc. 37: 311–315CrossRefGoogle ScholarPubMed
Chan, K. H., Heitzman, R. J. and Kitchenham, B. A. 1975. Digestibility and N-balance studies on growing heifers implanted with trienbolone acetate. Br. vet. J. 131: 170–174.Google Scholar
Coelho, J. F. S.Galbraith, H. and Topps, J. H. 1978. The effect of a combination of trienbolone acetate and 17β-oestradiol on the performance, carcass composition and blood characteristics of castrated male lambs. Anim. Prod. 26: 360 (Abstr.).Google Scholar
Galbraith, H. 1979a. Effect of zeranol implantation on the growth and blood metabolites and hormones of beef heifers. Anim. Prod. 28: 417–418 (Abstr.).Google Scholar
Galbraith, H. 1979b. Growth, metabolic and hormonal response in blood of British Friesian entire male cattle treated with trenbolone acetate and hexoestrol. Anim. Prod. 28: 427 (Abstr.).Google Scholar
Galbraith, H., Dempster, D. G. and Miller, T. B. 1978. A note on the effect of castration on the growth performance and concentrations of some blood metabolites and hormones in British Friesian male cattle. Anim. Prod. 26: 339–342.Google Scholar
Galbraith, H. and Watson, H. B. 1978. Performance, blood and carcase characteristics of finishing steers treated with trenbolone acetate and hexoestrol. Vet. Rec. 103: 28–30.CrossRefGoogle ScholarPubMed
Heitzman, R. J. and Chan, K. H. 1974. Alterations in weight gain and levels of plasma metabolites, proteins, insulin and free fatty acids following implantation of an anabolic steroid in heifers. Br. vet. J. 130: 532–537.Google Scholar
Heitzman, R. J., Chan, K. H. and Hart, I. C. 1977. Liveweight gains, blood levels of metabolites, proteins and hormones following implantation of anabolic agents in steers. Br.vet.J. 133:62–70.Google Scholar
Kellaway, R. C. and Colditz, P. J. 1975. The effect of heat stress on growth and nitrogen metabolism in Friesian and Fi Brahman × Friesian heifers. Aust. J. agric. Res. 26: 615–622.Google Scholar
Millward, D. J., Garlick, P. J., James, W. P. T., Sender, P. M. and Waterlow, J. C. 1976. Protein turnover. In Protein Metabolism and Nutrition, Ear. Ass. Anim. Prod. Publ. No. 16 (ed. Cole, D. J. A.Boorman, K. N.Buttery, P. J.Lewis, D.Neale, R. J. and Swan, H.), pp. 49–69. Butterworth, London.Google Scholar
Stollard, R. J. and Jones, D. M. 1979. The response to growth-promoting implants in finishing steers and heifers both in yards and at grass and the economic implications. Anim. Prod. 28: 415–416 (Abstr.).Google Scholar
Sykes, A. R. 1978. An assessment of the value of plasma urea nitrogen and albumin concentrations as monitors of the protein status of sheep. In The Use of Blood Metabolites in Animal Production, Br. Soc. Anim. Prod., Occ. Publ. No. 1, pp. 143–154.Google Scholar