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Ein Shams University (2014)

Response of the Immune System in Small Ruminants to Environmental Stresses and Its Relation to Their Reproductive Performance

El-Rayes, Muhammed Ahmed-Hilmy Abdulazizz

Titre : Response of the Immune System in Small Ruminants to Environmental Stresses and Its Relation to Their Reproductive Performance

Auteur : El-Rayes, Muhammed Ahmed-Hilmy Abdulazizz.

Etablissement de soutenance : Ein Shams University

Grade : Doctor of Philosophy (PhD) 2014

Résumé
The present study was carried out in Maryout Research Station (32º N Latitude), 35 kilometers southwest of Alexandria that belongs to Desert Research Center. This work was conducted to test the hypothesis that sheep and goats can tolerate feed shortage under semi-arid condition and if there is a difference between sheep and goats in their ability to withstand this shortage and harsh condition. Twenty female small ruminant animals were used in the present study. Experimental animals were ten adult female Barki sheep and ten adult female Baladi goats, approximately 3-5 years of age with an average body weight of 35.26 ± 4.31 and 30.67 ± 4.29, respectively. Animals in each species were divided into two groups (5 animals each) according to the feeding levels, 50% or 100% of maintenance requirements. The present study was designed to detect the impact of feed restriction (protein and energy) on live body weight, physiological responses, blood picture and some immunological and biochemical responses of the adult female small ruminants. In addition, histological, histopathological and cell ultrastructural studies of lymph nodes, ovary and uterus were investigated to estimate some reproductive traits of both dry ewes and does.

Présentation étendue (EULC)

Page publiée le 25 janvier 2016, mise à jour le 5 février 2019