Reproductive Traits and the Physiological Background of the Seasonal Variations in Egyptian Suffolk Ewes under the Conditions of Egypt
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Authors
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I F M Marai
Department of Animal Production, Faculty of Agricult~re, Zagazig University, Zagazig, Egypt
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A A El-darawany
Department of Animal Production, Faculty of Agricult~re, Zagazig University, Zagazig, Egypt
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E I Abou-Fandoud
Department of Sheep and Goats, Institute of Animal Research, Ministry of Agriculture, Dokki,
Egypt
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M A M Abdel-Hafez
Department of Sheep and Goats, Institute of Animal Research, Ministry of Agriculture, Dokki,
Egypt
Abstract
The calculated temperature-humidity index indicated absence of heat stressduring winter and exposure to very severe heat stress during summer and to severe
heat stress during autumn, under the sub-tropical conditions of Egypt. Cervical mucus
pH was lower significantly (P<O.O1), while viscosity (spinnbarkiet) and electric resistance
(ER) were higher significantly (P<O.O1) in winter than in summer and autumn
breeding seasons. Ferning arborization was not affected by season of the year.
Glucose, inorganic phosphorus and zinc were higher significantly (P<O.05) in cervical
mucus in winter and autumn than in summer breeding season. The progesterone
hormone level in urine (efficacious) in ewes at day 21 after mating was higher
significantly (P<O.05) in summer than in winter and autumn seasons. Conception
rate was higher significantly (P<O.05) in ewes mated in winter and autumn than
in those mated in summer breeding season.
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Submitted
15-12-2016
Published
16-12-2016
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How to Cite
Marai, I. F. M., El-darawany, A. A., Abou-Fandoud, E. I., & Abdel-Hafez, M. A. M. (2016). Reproductive Traits and the Physiological Background of the Seasonal Variations in Egyptian Suffolk Ewes under the Conditions of Egypt. Annals of Arid Zone, 43(2). https://epubs.icar.org.in/index.php/AAZ/article/view/65660
