| Titles |
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English :
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Improving reproductivity of heat stressed rams using GnRH or melatonin in subtropics
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Arabic :
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تحسين التناسل فىالكباش المعرضة للإجهاد الحرارى باستخدام هرمون الجونادوتروبين أو الميلاتونين فى المناطق شبه الاستوائية
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| Abstract |
Twelve rams and forty-eight ewes (½ Finland x ½ Rahmani) were used to study the possibility of using GnRH or Melatonin to improve the reproductive efficiency under hot summer conditions. The animals were divided into three equal and similar groups. The 1st group of rams was subjected to intramuscularly injection of saline solution (0.9% NaCI) as a control group. The 2nd group was intramuscularly injected with GnRH and the 3rd groups received Melatonin orally.
GnRH treatment improved (P<0.05) the heat-stressed rams libido, mating activity, fertility, serum testosterone, semen-ejaculate volume and total sperm output than in the control. Meanwhile sperm motility, dead spermatozoa, abnormalities, acrosomal integrity and sperm cell concentration did not change appreciably as a function of this treatment.
Treatment heat stressed rams with Melatonin increased (P<0.05) mating activity and fertility but the other reproductive performance traits did not differ than the control.
Key words: Heat stress, GnRH, Melatonin, reproductive performance, rams.
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| Publication year |
2005
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| Pages |
1 - 10
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| Availability location |
معهد بحوث الانتاج الحيواني- شارع نادي الصيد- دقي- جيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
Egyptian Journal. of Sheep, Goat and Desert Animal Science
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| Author(s) from ARC |
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| External authors (outside ARC) |
عبد الشافى محمد عبد السميع
زراعة قناة السويس
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| Agris Categories |
Animal physiology - Growth and development
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AGROVOC
TERMS |
Gnrh.
Heat stress.
Melatonin.
Rams.
Reproductive performance.
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| Publication Type |
Journal
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