| Titles |
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English :
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Reproductive aspects of Egyptian Baladi cattle
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Arabic :
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المظاهر التناسلية للابقار البلدية المصرية
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| Abstract |
The present study included two sections; Section 1 : in which 11 pubertal Baladi heifers were used to study the effect of season on the ovarian and estrous activities post-puberty. The year was divided into two periods 6 months each, cold and hot. Within each season four months were chosen for the experimental work. Heifers were checked for heat at 06:00 and 18:00 hr using a teaser bull. Blood samples were collected at 3-4 day interval for progesterone (P4) and estradiol l7β (E2) determination by RIA. The obtained results indicated that the ovulation cycle length of Baladi heifers was 22.6 ±0.8 days and the frequency of odd cycles was 52% VS. 48% for the normal one. Heat signs occurred at 100, 60, 42 and 42% for standing behavior, vaginal mucous discharge, tail raising and restlessness, respectively. Heifers during the hot season showed more (P< 0.05) signs of heat. Quiet ovulation represented 19.2 % of the total ovulations with no effect of season on its incidence. There was no effect of season on P4 concentration. E2 concentration at day of heat was higher during the hot season. NS/C for Baladi heifers was 1.2 ±0.1, since 81.8 % of heifers needed one service to get pregnant. Section 2: Data of 328 reproductive records of Baladi cattle were used to calculate the post-partum reproductive performance with particular reference to season of calving and parity. Post-partum service interval, service period, days open, calving interval, gestation period, number of services per conception, conception rate and age at first calving averaged 68.7 ±12.2 days, 23.8 ± 6.8 days, 92.6 ± 13.6 days, 378.6± 12.4 days, 286 ±3.5 days, 1.39± 0.04 and 67.5 % and 38.5 ±8.5 months respectively. Neither season of calving nor parity had significant effects on all the studied traits.
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| Publication year |
2007
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| Pages |
PP.124
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
1015
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Blood composition.
Cold.
Cows.
Heifers.
Ovulation.
Seasons.
Sexual maturity.
Warm season.
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| Proposed Agrovoc |
ovarian activities;estrous activities;
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| Publication Type |
PhD Thesis
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