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Seasonal fluctuations in the sexual activity of Awassi, German Mutton Merino, Corriedale, Border-Leicester and Dorset Horn rams:IV. Seasonal changes in the spermatogenic activity of Awassi rams and their relationship to the fructose and citric acid contents of semen

Published online by Cambridge University Press:  27 March 2009

D. Amir  and
R. Volcani
D. Amir
Affiliation:
The National and University Institute of Agriculture, Rehovot, Israel
R. Volcani
Affiliation:
The National and University Institute of Agriculture, Rehovot, Israel
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Extract

Exhaustion tests were carried out with two Awassi rams 4 times a year for 2 years. The maximum sperm number was obtained in October and the minimum in January. If we consider that the time needed for one spermatogenic cycle and for the migration of the sperm cells through the epid i dymal canal is over 2 months, we may assume that the spermatogenic activity changes with the length of day and reaches its maximum and minimum values during the longest and shortest days, respectively, whereas its androgenic activity is delayed by 3–4 months after the length of daylight changes.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 64 , Issue 1 , February 1965 , pp. 131 - 134
Copyright
Copyright © Cambridge University Press 1965

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