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Comparative semen characteristics of Corriedale, Marwari and Jaisalmeri rams maintained under hot arid conditions

Published online by Cambridge University Press:  27 March 2009

J. P. Mittal  and
P. K. Ghosh
J. P. Mittal
Affiliation:
Division of Animal Studies, Central Arid Zone Research Institute, Jodhpur, India
P. K. Ghosh
Affiliation:
Division of Animal Studies, Central Arid Zone Research Institute, Jodhpur, India
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Summary

This paper describes the comparative semen characteristics (volume, motility, sperm density, number of sperms, percentage live and abnormal sperms) of Corriedale (exotic) and Marwari and Jaisalmeri (indigenous) rams during the summer and rainy seasons under the arid conditions of Jodhpur, in northwestern India. Except for sperm density, the semen of indigenous animals was superior to that of the Corriedale, although the differences recorded were not of a magnitude to cause the Corriedale sheep to be considered reproductively ineffective under hot arid conditions, if managed properly. The present findings do not conform to the earlier views of the prevalence of ‘summer sterility’ in Corriedale rams observed under hot humid conditions but there appears to be a negative relationship between semen quality and atmospheric humidity. The Corriedale sheep are recommended for improving the sheep sector in the desert areas of Rajasthan.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 92 , Issue 1 , February 1979 , pp. 1 - 4
Copyright
Copyright © Cambridge University Press 1979

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