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Alexandria University (2014)

SOME STUDIES ON IMPROVING FERTILITY IN BARKI SHEEP RAISED IN SIWA OASIS

MOHAMED, BAHAA FARRAG MOHAMED.

Titre : SOME STUDIES ON IMPROVING FERTILITY IN BARKI SHEEP RAISED IN SIWA OASIS

Auteur : MOHAMED, BAHAA FARRAG MOHAMED.

Etablissement de soutenance : Alexandria University

Grade : Doctor of Philosophy (PhD) in Agricultural Science 2014

Résumé partiel
The present study was carried out at Siwa Oasis Research Station (Tegzerty Experimental Farm for Animal Production), which belongs to Desert Research Center, Ministry of Agriculture and Land Reclamation, Egypt. This station is located at 330 Km southwest of the Mediterranean shoreline and at 65 Km east of the Libyan borders. This study included two experiments (basic experiment and supportive applied experiment) to investigate improving fertility and twinning rate in Barki ewes raised in Siwa Oasis ; the basic experiment was during the period from September 2012 till May 2013, while the applied supportive experiment was during the period from August 2013 until April 2014. A- The basic experiment : Sixty-six non-pregnant and non-lactating Barki ewes with 3-5 years old and 41.80 ± 0.55 kg average live body weight were used. Animals were randomly divided into three equal groups (22 ewes of each). The estrus of the ewes in each group were synchronized using one of the following hormonal treatments : First group (G1) received double injections of prostaglandin F2α (1 ml Synchromate each 1 ml solution containing 250 mg Cloprostenol, Coopers Co., Germany) 10 days apart. On the other hand, ewes of the second group (G2) received double injections of prostaglandin F2α 10 days apart, and after 10 days later, intravaginal progestagen impregnated sponge (40 mg fluorogestone acetate, FGA, chronogest®, Intervet International, B.V. Manufactured in the European Union) was inserted. Sponges remained in situ for 14 days. On the day of sponge removal, ewes received an intramuscular injection of 750 IU PMSG (Folligon, Intervet, International, B.V. Manufactured in the European Union). While, ewes of the third group (G3) were given double injections of prostaglandin F2α 10 days apart and after 10 days later intravaginal progestagen impregnated sponge were inserted. Sponges remained in situ for 14 days. One day before sponge removal ewes was injected intramuscularly with 2 ml, 0.004 mg, GnRH. (Receptal, Intervet International, B.V. Manufactured in the European Union). All The experimental ewes were checked twice daily (morning and evening) to ensure that sponges remained in their position during the treatment period.

Présentation étendue (EULC)

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