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The effects of a combined androgenic-oestrogenic anabolic agent in steers and bulls 1. Growth and carcass composition

Published online by Cambridge University Press:  02 September 2010

A. V. Fisher ,
J. D. Wood  and
O. P. Whelehan
A. V. Fisher
Affiliation:
AFRC Food Research Institute — Bristol, Langford, Bristol BS18 7DY
J. D. Wood
Affiliation:
AFRC Food Research Institute — Bristol, Langford, Bristol BS18 7DY
O. P. Whelehan
Affiliation:
AFRC Food Research Institute — Bristol, Langford, Bristol BS18 7DY
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Abstract

Twenty-one pairs of male cattle twins, 10 of which were monozygotic, were used in a study of the effects of a combined implant of trenbolone acetate (140 mg) and oestradiol-17B (20 mg) on growth and carcass composition. There were three comparisons within pairs: (1) between bulls and steers (no implants); (2) between bulls and implanted steers; and (3) between bulls and implanted bulls.

Implants were given twice, at 44 to 73 days and at 300 days of age. Animals were slaughtered at 400 days following recorded consumption of a complete pelleted diet given ad libitum. Carcasses were separated into tissues and lean and fat were chemically analysed. The effects of castration and/or implantation on growth and carcass composition were assessed by comparison with the untreated (control) bull values within each group and expressed as a ratio (treatedxontrol). These ratios were then compared between groups.

Bulls were significantly heavier than steers at slaughter (29·6 kg, P < 0·05), but were not heavier than implanted steers. Implantation of steers tended to increase appetite; it proportionately increased lean and protein production by about 0·1, and partly reversed the effects of castration on the length of limb bones and the weights of reproductive organs and hide. The proportions of carcass tissues were very similar in the untreated and implanted steers. In bulls, implantation increased the weight of fatty tissue in the subcutaneous and intermuscular depots, but it had small effects on other carcass characteristics.

Type
Research Article
Information
Animal Production , Volume 42 , Issue 2 , April 1986 , pp. 203 - 211
Copyright
Copyright © British Society of Animal Science 1986

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References

REFERENCES

Baker, F. H. and Arthaud, V. H. 1972. Use of hormones or hormone active agents in production of slaughter bulls. J. Anim. Sci. 35: 752–754.Google Scholar
Brannang, E. and Rendel, J. 1958. A comparison between morphological and immunogenetical methods of diagnosing zygocity in cattle twins. Z. Tierz. Zucht BioI. 71: 299–314.CrossRefGoogle Scholar
Brown, A. J. and Williams, D. R. 1980. Beef carcass evaluation — measurement of composition using a standardized butchery jointing method. Memo. Meat Res. Inst., No. 46.Google Scholar
Brown, A. J. and Williams, D. R. 1981. Beef carcass evaluation — measurement of composition using anatomical dissection. Memo. Meat Res. Inst., No. 47.Google Scholar
Callow, E. H. 1944. The food value of beef from steers and heifers, and its relation to dressing-out percentage J. agric. Sci., Camb. 34: 177–189.Google Scholar
Chatfield, C. 1975. Statistics for Technology. 2nd ed.Chapman and Hall, London.Google Scholar
de Boer, H., Dumont, B. L., Pomeroy, R. W. and Weniger, J. H. 1974. Manual on EAAP reference methods for the assessment of carcass characteristics in cattle. Livest. Prod. Sci. 1: 151–164.Google Scholar
Department of Health and Social Security. 1984. Diet and cardiovascular disease. Rep. Health and Social Subjects No. 28. Her Majesty's Stationery Office, London.Google Scholar
Fisher, A. V., Wood, J. D. and Tas, M. 1986. Effects of some anabolic agents on the growth, carcass and tissue composition of barley-fed entire and castrated male Friesian cattle. Anim. Prod. 42: 195–201.Google Scholar
Galbraith, H. and Topps, J. H. 1981. Effects of hormones on the growth and body composition of animals. Nutr. Abstr. Rev. Ser. B. 51: 521–540.Google Scholar
Grandadam, J. A., Scheid, J. P., Jobard, A., Dreux, H. and Boissons, J. M. 1975. Results obtained with trenbolone acetate inconjunction with estradiol-176 in veal calves, feedlot bulls, lambs and pigs. J. Anim. Sci. 41: 969–977.CrossRefGoogle Scholar
Griffiths, T. W. 1982. Effects of trenbolone acetate and resorcylic acid lactone on protein metabolism and growth in steers. Anim. Prod. 34: 309–314.Google Scholar
Heitzman, R. J. 1976. The effectiveness of anabolic agents in increasing rate of growth in farm animals; report on experiments in cattle. In Environmental Quality and Safety, Suppl. Vol. V (ed. Coulston, F. and Korte, F.), pp. 89–98. George Thieme, Stuttgart.Google Scholar
Heitzman, R. J., Gibbons, Diana N., Little, W. and Harrison, Lynne P. 1981. note on the comparative performance of beef steers implanted with the anabolic steroids trenbolone acetate and oestradiol-17β alone or in combination. Anim. Prod. 32: 219–222.Google Scholar
Hristic, V., Knezevic, J., Cuperlowic, M. and Milosevic, M. 1981. The effect of subcutaneous implantation of Revalor on performance and some physiological parameters in bulls. In Steroids in Animal Production (ed. Jasiorowski, H.), pp. 179–186. Roussel-Uclaf/Warsaw Agricultural University, Warsaw.Google Scholar
Meat and Livestock commission. 1984. UK Market Review (Economic Information Service) No. 3.Google Scholar
Rumsey, T. S., Tyrrell, H. F., Dinius, D. A., MOE, P. W. and Cross, H. R. 1981. Effect of diethylstilbestrol on tissue gain and carcass merit of feedlot beef steers. J. Anim. Sci. 53: 589–600.CrossRefGoogle ScholarPubMed
Schanbacher, B. D., Prior, R. L. and Smith, S. B. 1983. Effects of castration and subdermal silastic implants containing oestradiol-17β-dipropionate on feedlot performance and carcass characteristics of male cattle. Anim. Prod. 37: 73–80.Google Scholar
Trenkle, A. and Willham, R. L. 1977. Beef production efficiency. Science, N.Y. 198: 1009–1015.CrossRefGoogle ScholarPubMed
Truscott, T. G., Wood, J. D. and Macfie, H. J. H. 1983. Fat deposition in Hereford and Friesian steers. 1. Body composition and partitioning of fat between depots. J. agric. Sci., Camb. 100: 257–270.CrossRefGoogle Scholar
Vanderwal, P., Berende, P. L. M. and Sprietsma, J. E. 1975. Effect of anabolic agents on performance of calves J. Anim. Sci. 41: 978–985.Google Scholar
Verbeke, R., Debackere, M., Hicouet, R., Lauwers, H., Pottie, G., Stevens, J., Van Moer, D., Van Hoof, J. and Vermeersch, G. 1976. Quality of the meat after the application of anabolic agents in young calves. In Environmental Quality and Safety, Suppl. Vol. V. (ed. Coulston, F. and Korte, F.), pp. 115–122. George Thieme, Stuttgart.Google Scholar
Williams, D. B., Vetter, R. L., Burroughs, W. and Topel, D. G. 1975. Dairy beef production as influenced by sex, protein level and diethylstilbestrol. J. Anim. Sci. 41: 1532–1541.CrossRefGoogle Scholar
Williams, D. R. and Bergstrom, P. L. 1980. Anatomical jointing, tissue separation and weight recording. EEC standard method for beef. Commission of the European Communities. Brussels. EUR 6878 EN. (Mimeograph).Google Scholar