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The effects of melatonin treatment and recent sexual experience on the ability of rams to induce ovulation in seasonally anoestrous ewes

Published online by Cambridge University Press:  20 November 2017

H.J.D. Rosa  and
M.J. Bryant
H.J.D. Rosa
Affiliation:
The University of Reading, Department of Agriculture, Earley Gate, PO Box 236, Reading RG6 6AT, UK
M.J. Bryant
Affiliation:
The University of Reading, Department of Agriculture, Earley Gate, PO Box 236, Reading RG6 6AT, UK
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Extract

Rosa and Bryant (1997) have described how sexual experience increased the amount of time that rams spent in courtship of seasonally anoestrous ewes. There was a non-significant trend for a greater proportion of ewes to respond to increased ram stimulation in early July, indicating that efforts to enhance the cues provided by rams at this time may be effective in increasing the incidence of ovulation. The objective of this experiment was to establish if advancing the seasonal changes associated with the rams by treatment with exogenous melatonin and allowing the rams prior sexual experience would induce ovulation in anoestrous ewes in early July.

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1999 , 1999 , pp. 69
Copyright
Copyright © The British Society of Animal Science 1999

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References

Rosa, H.J.D. and Bryant, M.J. 1998. Effect of exposure to oestrous ewes on rams' sexual behaviour , testosterone secretion and ability to stimulate ovulation in seasonal anoestrous ewes. Proceedings of the British Society of Animal Science 1998, p 186 Google Scholar