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Effect of different doses of 17β-oestradiol on growth and carcass composition of wether and ewe lambs

Published online by Cambridge University Press:  27 March 2009

J. J. Bass ,
P. J. Fowke ,
D. M. Duganzich  and
A. J. Peterson
J. J. Bass
Affiliation:
Ruakura Agricultural Centre, Private Bag, Hamilton, New Zealand
P. J. Fowke
Affiliation:
Ruakura Agricultural Centre, Private Bag, Hamilton, New Zealand
D. M. Duganzich
Affiliation:
Ruakura Agricultural Centre, Private Bag, Hamilton, New Zealand
A. J. Peterson
Affiliation:
Ruakura Agricultural Centre, Private Bag, Hamilton, New Zealand
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Summary

Silastic implants of different lengths (0·5–4 cm) containing oestradiol were implanted in wether or ewe lambs, which were slaughtered at 14 or 23 weeks of age. Live weight gain and carcass weight of lambs was increased marginally by oestradiol treatment. Oestradiol decreased the percentage of fat in the carcass, while increasing the percentage of carcass water. Older lambs had a greater response to oestradiol treatment for the weights of the carcass protein and ash. The female reproductive system was affected by oestradiol with the ovarian weights being depressed and the uterine weights increasing. The uterus was especially sensitive to oestradiol at 14 weeks of age. Oestradiol increased the weight of protein in lamb carcasses, especially in the older lambs of this study.

Type
Review
Information
The Journal of Agricultural Science , Volume 113 , Issue 2 , October 1989 , pp. 183 - 187
Copyright
Copyright © Cambridge University Press 1989

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References

REFERENCES

Bass, J. J., Carter, W. D., Duganzich, D. M. & Kirton, A. H. (1989). Effects of oestradiol-17β on growth and insulin-like growth factor-I of steers on different pasture allowances. Livestock Production Science (in press.)Google Scholar
Clemmons, D. R., Underwood, L. E., Ridgway, E. C, Kliman, B., Kjellberg, R. N. & Van Wyk, J. J. (1980). Estradiol treatment of acromegaly: reduction of immunoreactive somatomedin-C and improvement in metabolic status. American Journal of Medicine 69, 571–575.CrossRefGoogle ScholarPubMed
Copeland, K. C., Johnson, D. M., Kuehl, T. J. & Castracane, V. D. (1984). Estrogen stimulates growth hormone and somatomedin-C in castrate and intact female baboons. Journal of Clinical Endocrinology and Metabolism 58, 698–703.Google Scholar
Davis, S. L., Ohlson, D. L., Klindt, J. & Anfinson, M. S. (1977). Episodic growth hormone secretory patterns in sheep: relationship to gonadal steroid hormones. American Journal of Physiology, 33, E519–E523.Google Scholar
Donaldson, I. A., Hart, I. C. & 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. Research in Veterinary Science 30, 7–13.Google Scholar
Gee, I. & Preston, T. R. (1957). The effect of hexoestrol implantation on carcass composition and efficiency of food utilisation in fattening lambs. British Journal of Nutrition 11, 329–338.Google Scholar
Gopinath, R. & Kitts, W. D. (1984). Growth hormone secretion and clearance rates in growing beef steers implanted with estrogenic anabolic compounds. Growth 48, 499–514.Google ScholarPubMed
Kirton, A. H., Barton, R. A. & Rae, A. L. (1962). The efficiency of determining the chemical composition of lamb carcasses. Journal of Agricultural Science, Cambridge 58, 381–386.CrossRefGoogle Scholar
Meyer, H. H. D. & Rapp, M. (1985). Estrogen receptor in bovine skeletal muscle. Journal of Animal Science 60, 294–300.Google Scholar
Muir, L. A., Wien, S., Duquette, P. F., Rickes, E. L. & Cordes, E. H. (1983). Effects of exogenous growth hormone and diethylstilbestrol on growth and carcass composition of growing lambs. Journal of Animal Science 56, 1315–1323.Google Scholar
O'Mary, C. C., Pope, A. L., Wilson, G. D., Bray, R. W. & Casida, L. E. (1952). The effects of diethylstilbestrol, testosterone and progesterone on growth and fattening and certain carcass characteristics of western lambs. Journal of Animal Science 11, 656–673.Google Scholar
Peterson, A. J., Fairclough, R. J. & Smith, J. F. (1975). Radioimmunoassay of estradiol-17β in bovine peripheral plasma with and without chromatography. Steroids 25, 487–495.CrossRefGoogle ScholarPubMed
Rumsey, T. S., Tyrrell, H. F., Dinius, D. A., Moe, P. W. & Cross, H. R. (1981). Effect of diethylstilbestrol on tissue gain and carcass merit of feedlot beef steers. Journal of Animal Science 53, 589–600.Google Scholar
Schwartz, E., Wiedemann, E., Simon, S. & Schiffer, M. (1969). Estrogenic antagonism of metabolic effects of administered growth hormone. Journal of Clinical Endocrinology and Metabolism 29, 1176–1181.Google Scholar
Singh, S. B., Galbraith, H., Scaife, J. R. & Hunter, E. A. (1985). Effect of oestrogenic and androgenic compounds on growth and body composition of male castrate lambs. Proceedings of the Nutrition Society 44, 93A.Google Scholar
Van Der Wal, P. & Berende, P. L. M. (1983). Effects of anabolic agents in food producing animals. Anabolics in Animal Production Symposium. Paris: Office International des Epizooties, 73–115.Google Scholar
Wagner, J. F. (1983). Estradiol controlled release implants efficacy and drug delivery. Anabolics in Animal Production Symposium. Paris: Office International des Epizooties 129–142.Google Scholar