The effect of melatonin treatment on wool growth and thyroxine secretion in sheep

Small Ruminant Research

Volumn 56, Issue 1-3, 2005, Pages 265-270

  Abecia, J A ^a   Valares, J A ^a   Forcada, F ^a  

^a UNIVERSIDAD DE ZARAGOZA   (Spain)

Author keywords

Melatonin; Sheep; Thyroxine; Wool

Indexed keywords

OVIS; OVIS ARIES;

EID: 9644269218     PISSN: 09214488     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.smallrumres.2004.03.001     Document Type: Article

References (22)

1. Abecia J.A., Zúñiga O., Forcada F. Effect of melatonin treatment in spring and feed intake on wool growth and thyroxine secretion in Rasa Aragonesa ewes. Small Rumin. Res. 41:2001;265-270
2. Donald G.E., Langlands J.P., Bowles J.E., Smith A.J. Subclinical selenium insufficiency. 5. Selenium status and the growth and wool production of sheep supplemented with thyroid-hormones. Aust. J. Exp. Agric. 34:1994;13-18
3. Forcada F., Abecia J.A., Zúñiga O., Lozano J.M. Variation in the ability of melatonin implants inserted at two different times after the winter solstice to restore reproductive activity in reduced seasonality ewes. Aust. J. Agric. Res. 53:2002;167-173
4. Forcada F., Abecia J.A., Zúñiga O. Regulation of LH secretion during seasonal anestrus by dopaminergic pathways in Mediterranean ewes treated or not with melatonin. Can. J. Anim. Sci. 83:2003;311-313
5. Goot, H., 1986. Development of Assaf, a synthetic breed of dairy sheep in Israel. In: Proceedings of the 37th Annual Meeting of European Association of Animal Production, pp. 1-29.
6. Hafez E.S.E. Reproductive capacity of farm animals in relation to climate and nutrition. J. Agric. Sci. 42:1959;606-614
7. Haresign W., Peters A.R., Staples L.D. The effect of melatonin implants on breeding activity and litter size in commercial sheep flocks in the UK. Anim. Prod. 50:1990;111-121
8. Harris P.M., Xu Z.Z., Blair H.T., Dellow D.W., McCutcheon S.N., Cockrem J. The effect of exogenous melatonin, administered in summer, on wool growth and testis diameter of Romneys. Proc. NZ Soc. Anim. Prod. 49:1989;35-38
9. Hawker H., Crosbie S.F., Barber M., Andrews R.N. Effect of shearing and herbage allowance on the intake, live weight gain and wool growth of Romney ewe hoggets in spring/summer. Proc. NZ Soc. Anim. Prod. 45:1985;141-146
10. Hynd P.I. Follicular determinants of the length and diameter of wool fibres. 2. Comparison of sheep differing in thyroid-hormone status. Aust. J. Agric. Res. 45:1994;1149-1157
11. Karsch F.J., Dierschke D.J., Weick R.F., Yamani T., Hotchkiss J., Knobil E. Positive and negative feedback control by estrogen of luteinizing hormone secretion in the rhesus monkey. Endocrinology. 92:1973;799-804
12. Lincoln G.A. Correlation with changes in horns and pelage, but not reproduction, of seasonal cycles in the secretion of prolactin in rams of wild, feral and domesticated breeds of sheep. J. Reprod. Fertil. 90:1990;285-296
13. Lincoln G.A., Ebling F.J.P. Effect of constant-release implants of melatonin on seasonal cycles in reproduction, prolactin secretion and moulting in rams. J. Reprod. Fertil. 73:1985;241-253
14. MAPA, 1985. Spanish Breeds Catalogue. I. Sheep and Goat. Ministry of Agriculture, Food and Fisheries of Spain, Madrid, 233 pp.
15. McCloghry C.E., Foldes A., Hollis D.E., Rintoul A.J., Maxwell C.A., Downing J., Baker P.J., Kennedy J.P., Wynn P.C. Effects of pinealectomy on wool growth and wool follicle density in Merino sheep. J. Pineal Res. 13:1992;139-144
16. Pearson A.J., Parry A.L., Ashby M.G., Choy V.J., Wildermoth J.E., Craven A.J. Inhibitory effect of increased photoperiod on wool follicle growth. J. Endocrinol. 148:1996;157-166
17. Ryder, M.L., 1964. Moulting and hair replacement. In: Rook, A., Champion, R.H. (Eds.), Progress in the Biological Sciences in Relation to Dermatology, vol. 2. Cambridge University Press, Cambridge, pp. 325-335.
18. 4 secretions in Polwarth-Ideal rams. Small Rumin. Res. 46:2002;1-5
19. Sumner R.M.W., Wuliji T., Dobbie J.L., Andrews R.N., Upsdell M.P. Seasonality of wool growth in Waikato and Southland of Romney sheep selected for high fleece weight. Proc. NZ Soc. Anim. Prod. 58:1998;270-273
20. Valera M., Arrebola F., Molina A., Barajas F., Ambona J. Wool production of Spanish Merino after 20 years of meat production selection. FEAGAS. 12:2002;89-94
21. Yeates N.T.M. The breeding season of the sheep with particular reference to its modification by artificial means using light. J. Agric. Sci. 39:1949;1-43
22. Zeuner, F.E., 1963. A history of Domesticated Animals. Hutchinson, London, 560 pp.