Veterinary Obestrics and Gynaecology

Permanent URI for this collection

http://etd.aau.edu.et/handle/123456789/211

Browse

Browsing Veterinary Obestrics and Gynaecology by Author "Dr. Alemayehu Lemma"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    EFFECT OF TRADITIONAL HUSBANDRY ON REPRODUCTIVE PERFORMANCE OF GOATS IN BENISHANGUL-GUMUZ REGION
    (2008-06) YESHAWORK, BEGASHAW; Dr. Alemayehu Lemma
    Study was conducted from October 2007 to April 2008 in six districts of two administrative zones of the Benishangul-Gumuz region to determine the reproductive performance of goats under traditional husbandry system. Structure questionnaire and a field clinical survey studies were used on a total of 200 randomly selected households. The entire goats owned by the households were clinically examined for the presence of any health problem. Records of animal identification, parameters of reproductive performance such as weaning age and age at puberty, litter size, KI, the type of management practice and clinical parameters were taken on pre-designed format. The type of management was measured from conditions of housing (absence or presence), feeding (presence of supplementation), and health (getting veterinary service). The level of management was categorized as poor, moderate and good according to Song et al., (2006). Accordingly, goats were primarily (68%) kept for income generation while some (26%) keep goats for both income generation and/or meat. The common housing practice was either poor (48.5%) or inexistent (51.5%). Feeding on natural pasture with supplementation (commonly maize, sorghum or kitchen waste) constitute 29% while the remaining 71% were known to exclusively depend on grazing. The major production constraints were health problems (53%); poor genetic potential (20.43%) and shortage of feed (20.32%). Generally, goats reached puberty at 6.5±1.22 (male) and 6.7±1.22 months (female). The mean (±sd) kidding interval was 252.35±31.46 days with a mean (±sd) litter size of 1.6±0.3. Annual reproductive rate was found to be 2.2kids/year. The mean (±sd) weaning age was 4.74±0.7 months. All animals were clinically examined on the basis of the history, inspection, palpation, percussion, auscultation and information was taken from each household during the study period. Out of 461 clinically examined animals the incidence of external parasitism, internal parasitism; reproductive diseases, and infectious diseases were in the order of 80.7 %, 23.2%, 16.1% and 22.8 %, respectively. The primary goat feed resource was natural pasture and river was a main source of water. The prevailing housing is rudimentary and difficulty for management of different categories of goats. Over all management level, especially health management and feeding regime were found to be the ix primary factors significantly affecting the reproductive parameters of goats. Kidding interval and weaning age were the most affected parameters by existing traditional husbandry in the study area.
  • No Thumbnail Available
    Item
    OVARIAN FOLLICULAR DYNAMICS AND EFFECT OF BREED ON CONCEPTION RATE TO ARTIFICIAL INSEMINATION WITH FROZEN SEMEN IN MARES
    (2018-06) Ararsa, Duguma; Dr. Alemayehu Lemma
    Equine reproduction is unique by having long behavioral estrus and variations in ovarial follicular dynamics. Additionally, differences in time of breeding between breeds and individuals of mares made difficulty to standardize breeding time. There were a limitted data on equine reproduction and breeding in Ethiopia. An experimental study was conducted at Balderas sport horses and recreational center, Addis Ababa, Ethiopia from January to June, 2018 to determine ovarian follicular dynamics and evaluate conception rate to frozen semen in local and exotic cross breed mares. A daily transrectal ultrasonography was carried out to evaluate uterine changes and ovarian structures for 2-3 consecutive estrus cycles. Inseminations were done post ovulation within an average of 6-9h using frozen thawed semen. The mean (+SEM) of cross sectional uterine diameter were 44.4+0.5mm and 45+0.5mm for local and cross breed mares respectively; whereas endometrial fold development indicated 3.1+0.1 in local and 2.8+0.1 scores in cross breed mares with significant difference at P<0.05. The mean (+SEM) of preovulatory follicle diameter in local and cross breed mares indicated 49.1+1.0mm and 50.1+0.8mm respectively. Fast growth of dominant follicles in cross breed shorten interovulatory interval than local breed mares with length of estrus, 7.0+0.9 days for local and 6.1+0.6 days for cross breed mares. A positive correlation of teasing scores, uterine diameter and endometrial fold scores with diameter of developing dominant follicles in the present study has been used to estimate time of eminent ovulation. The overall conception rate to frozen semen was 15/21 (71.43%) with 8/11 (72.73%) in cross breed and 7/10 (70%) local breed mares. Conception rate increased significantly with increased number of services/conception with an overall mean +(SEM) of 2.2+0.2 services/conception. More number of services/conception were required for local breed (2.7+0.2) than cross breed mares (1.8+0.3) and again for lower body condition scores than higher condition scores of mares. In conclusion, measuring a cross sectional uterine diameter, endometrial folding scores and teasing scores with developing dominant follicles and their correlation were good parameters to determine relative time of ovulation and breeding in mares; whereas good management of mares for improved body conditions could require to decrease number of services per conception.