Skip to main content Accesibility Help

The effect of trenbolone acetate on growth rate and carcass composition of young female rabbits

  • G. E. Lobley (a1), A. Walker (a1), Alexmary Connell (a1) and H. Galbraith (a2)

1. Eighteen New Zealand White × Califomian young female rabbits (does) were paired by weight and age and, at 800 g live weight, placed on a restricted intake based on the mean body weight of each pair. On attaining 1 kg one of each pair was then given 10 mg trenbolone acetate by injection on days 1, 3 and 5 of each week. This continued until the animals reached 2·3 to 2·4 kg (5 to 6 weeks).

2. There were no differences in digestible or metabolizable energy intakes between treated and untreated rabbits. However, the treated animals showed small but significant increases in rates of gain for live and empty body weight compared with control does. Treated animals also had significantly more nitrogen (P < 0·001) and less energy (P < 0·05) per unit empty body weight than controls. Although the proportion of total nitrogen retention was 0·19 greater (P < 0·001) in treated does, total energy retention was only slightly less. Treated animals had approximately 40 g (200 g/kg) less fat and 50 g more protein (N × 6·25) than control does at the end of the trial.

3. Increases in liver weight and clitoral size were observed in treated animals.

Hide All
Association of Official Agricultural Chemists. 1980. Official Methods of Analysis. 13th ed. Association of Official Agricultural Chemists, Washington DC.
Babikir, A. E. 1981. The effect of trenbolone acetate alone or combined with 17β-oestradiol on the growth performance and body composition of growing female rabbits. M.Sc. Thesis, Dep. Agric, Univ. Aberdeen.
Best, J. M. J. 1972. The use of trienbolone acetate implants in heifer beef production at pasture. Vet. Rec. 91:624626.
Donaldson, I. A., Hart, I. C. and Heitzman, R. J. 1981. Growth hormone, insulin, prolactin and total thyroxine in the plasma of sheep implanted with the anabolic steroid trenbolone acetate alone or with oestradiol. Res. vet. Sci. 30: 713.
Galbraith, H. 1980. The effect of trenbolone acetate on growth, blood hormones and metabolites, and nitrogen balance of beef heifers. Anim. Prod. 30: 389394.
Galbraith, H. and Watson, H. B. 1978. Performance, blood and carcase characteristics of finishing steers treated with trenbolone acetate and hexoestrol. Vet. Rec. 103: 2831.
Garrett, W. N. 1970. The influence of sex on the energy requirements of cattle for maintenance and growth. In Energy Metabolism of Farm Animals, Eur. Ass. Anim. Prod. Publ. No. 13 (ed. Schürch, A. and Wenk, C.), pp. 101104. Juris Druck and Verlag, Zurich.
Heitzman, R. J. 1980. Manipulation of protein metabolism, with special reference to anabolic agents. In Protein Deposition in Animals (ed. Buttery, P. J. and Lindsay, D. B.), pp. 193203. Butterworth, London.
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: 532537.
Heitzman, R. J., Chan, K. H. and Hart, I. C. 1977. Live-weight gains, blood levels of metabolites, proteins and hormones following implantation of anabolic agents in steers. Br. vet. J. 133: 6270.
Hoffman, B. and Oettel, G. 1976. Radioimmunoassays for free and conjugated trienbolone and for trienbolone acetate in bovine tissue and plasma samples. Steroids 27: 509523.
Kielanowski, J. 1976. Energy cost of protein deposition. In Protein Metabolism and Nutrition, Eur. 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. 207215. Butterworth, London.
Lobley, G. E., Smith, J. S., Mollison, G., Connell, Alexmary and Galbraith, H. 1982. The effect of an anabolic implant (trenbolone acetate + oestradiol-17β) on the metabolic rate and protein metabolism of beef steers. Proc. Nutr. Soc. 41: 28A (Abstr.).
Partridge, G. G., Foley, S. and Corrigall, W. 1981. Reproductive performance in purebred and crossbred commercial rabbits. Anim. Prod. 32:325331.
Pullar, J. D. and Webster, A. J. F. 1977. The energy cost of fat and protein deposition in the rat. Br. J. Nutr. 37:355363.
Reeds, P. J., Cadenhead, A., Fuller, M. F., Lobley, G. E. and McDonald, J. D. 1980. Protein turnover in growing pigs. Effects of age and food intake. Br. J. Nutr. 43:445455.
Rodway, R. G. and Galbraith, H. 1979. Effects of anabolic steroids on hepatic enzymes of amino acid metabolism. Horm. Metab. Res. 11:491492.
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: 415416 (Abstr.).
Van Weerden, E. J. and Grandadam, J. A. 1976. The effect of an anabolic agent on N-deposition, growth and slaughter quality in growing castrated male pigs. In Anabolic Agents in Animal Production (ed. Lu, F. C. and Rendel, J.), pp. 115122. Georg Thieme, Stuttgart.
Vernon, B. G. and Buttery, P. J. 1976. Protein turnover in rats treated with trienbolone acetate. Br. J. Nutr. 36: 575579.
Vernon, B. G. and Buttery, P. J. 1978a. Protein metabolism of rats treated with trienbolone acetate. Anim. Prod. 26: 19.
Vernon, B. G. and Buttery, P. J. 1978b. The effect of trenbolone acetate with time on the various responses of protein synthesis of the rat. Br. J. Nutr. 40:563572.
Webster, A. J. F., Smith, J. S. and Mollison, G. S. 1977. Prediction of the energy requirements for growth in beef cattle. 3. Body weight and heat production in Hereford × British Friesian bulls and steers. Anim. Prod. 24: 237244.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Animal Science
  • ISSN: 1357-7298
  • EISSN: 1748-748X
  • URL: /core/journals/animal-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed