Post-partum reproductive characteristics of Egyptian lactating native (Baladi) cattle
Abstract: Twenty cyclic native Baladi cows (10 in the cold season and 10 in the hot season) were used to characterize the post-partm reproductive performance during the days open period, with particular emphasis on season of calving of this endangered breed. Cows were checked visually for heat three times daily, at 8 hr intervals starting at 06.00 hr in a presence of teaser bull.
Standing behavior was considered the main sign of heat even when it was not accompanied by other estrous symptoms. Blood progesterone concentration was determined twice a week for monitoring ovarian activity. The intervals from calving to complete uterine involution (UIP), first ovulation (PPOI), estrus (PPEI), conception (DO), number of ovulations in the first 60 days postpartum and incidence of quiet ovulation were estimated as well as the number of services required for conception (NS/C) and conception rate (CR %). Estrus signs were classified into weak, moderate and strong according to the number of heat signs that a cow displayed. Heat period was also recorded.
Means of UIP, PPOI, PPEI and DO were 27.6, 44.0, 53.5 and 72.1, respectively. Number of services per conception was 1.3 in both seasons, with a higher conception rate in cold (86.5%) than in the hot (65.6%) season. The average length of the heat period was found to be less than 10 hours, with a relatively longer period in the cold season. Heat intensity was moderate on average, however the percentage of pronounced heat cases (strong and moderate) was higher in the hot (90%) than in the cold (65%) season. The most frequent signs of estrous behavior were standing to the bull and followed by the bull (100%), followed by restlessness (55%) and vulva sniffed by other herd mates (47%). The least frequent sign was bellowing and mounted by other herd mates (24%), followed by vaginal mucous discharge (36%).
Key words: Egyptian cattle (Baladi), Postpartum period, Ovarian activity
Publication year 2005
Pages 250-258
Availability location معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
City اسيوط
serial title Journal Egyptian Veterinary Medical Assuit
Author(s) from ARC
Agris Categories Animal feedingAnimal physiology - NutritionAnimal physiology - Reproduction
AGROVOC
TERMS		 Cold season. Cows. Perinatal period. Reproductive performance. Warm season.
Proposed Agrovoc Ovarian activity;Egyptian cattle (Baladi);post-partm;Blood progesterone;
Publication Type Journal
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