Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter
This study compared the effect of oestrus synchronization using controlled-internal-drug-release-device (CIDR) and equine chorionic gonadotropin (eCG) on reproductive efficiency of Dammar ewes in winter. Data of forty-one ewes were divided into two groups; for long CIDR treatment (12 days, LT, n=25)...
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| Format: | Article |
| Language: | English |
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Academic Journals
2012
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| Online Access: | http://psasir.upm.edu.my/id/eprint/25423/ http://psasir.upm.edu.my/id/eprint/25423/1/25423.pdf |
| _version_ | 1848845306244890624 |
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| author | Hesam, Nasser Saleh Obad Haron, Abd Wahid Saharee, Abdul Aziz Abu Bakar @ Zakaria, Md Zuki Goriman Khan, Mohd Azam Khan Jabbar, A. G. Mahfoz, M. A. |
| author_facet | Hesam, Nasser Saleh Obad Haron, Abd Wahid Saharee, Abdul Aziz Abu Bakar @ Zakaria, Md Zuki Goriman Khan, Mohd Azam Khan Jabbar, A. G. Mahfoz, M. A. |
| author_sort | Hesam, Nasser Saleh Obad |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This study compared the effect of oestrus synchronization using controlled-internal-drug-release-device (CIDR) and equine chorionic gonadotropin (eCG) on reproductive efficiency of Dammar ewes in winter. Data of forty-one ewes were divided into two groups; for long CIDR treatment (12 days, LT, n=25) and for short CIDR treatment (6 days, ST, n=16). The LT group was further divided into 3 subgroups to receive eCG either 48 h before CIDR removal (LT1), or at CIDR removal (LT2). Nevertheless, a third subgroup (LT3) received no eCG and served as the control variable. The ST group was also divided into two subgroups to receive eCG either at CIDR removal (ST1) or to receive no eCG (ST2). Five fertile rams naturally mated the ewes. Then in terms of oestrous responses, the pregnancy and lambing rates were 100 percent (100%) in ewes for all treatments. The onset and duration of oestrous was shorter in LTa1 than the remaining subgroups. Litter size in those of LT2 and LT1 subgroups was greater than those of LT3. Additionally, litter size in those of ST1 was greater than in those of ST2 subgroup. This indicated that eCG injection affected litter size. In conclusion, these results indicated that CIDR could successfully be used for either 6 or 12 days prior to ram introduction without having to administer eCG. However, eCG is important to induce multiple births. |
| first_indexed | 2025-11-15T08:44:43Z |
| format | Article |
| id | upm-25423 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:44:43Z |
| publishDate | 2012 |
| publisher | Academic Journals |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-254232017-11-10T02:41:24Z http://psasir.upm.edu.my/id/eprint/25423/ Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter Hesam, Nasser Saleh Obad Haron, Abd Wahid Saharee, Abdul Aziz Abu Bakar @ Zakaria, Md Zuki Goriman Khan, Mohd Azam Khan Jabbar, A. G. Mahfoz, M. A. This study compared the effect of oestrus synchronization using controlled-internal-drug-release-device (CIDR) and equine chorionic gonadotropin (eCG) on reproductive efficiency of Dammar ewes in winter. Data of forty-one ewes were divided into two groups; for long CIDR treatment (12 days, LT, n=25) and for short CIDR treatment (6 days, ST, n=16). The LT group was further divided into 3 subgroups to receive eCG either 48 h before CIDR removal (LT1), or at CIDR removal (LT2). Nevertheless, a third subgroup (LT3) received no eCG and served as the control variable. The ST group was also divided into two subgroups to receive eCG either at CIDR removal (ST1) or to receive no eCG (ST2). Five fertile rams naturally mated the ewes. Then in terms of oestrous responses, the pregnancy and lambing rates were 100 percent (100%) in ewes for all treatments. The onset and duration of oestrous was shorter in LTa1 than the remaining subgroups. Litter size in those of LT2 and LT1 subgroups was greater than those of LT3. Additionally, litter size in those of ST1 was greater than in those of ST2 subgroup. This indicated that eCG injection affected litter size. In conclusion, these results indicated that CIDR could successfully be used for either 6 or 12 days prior to ram introduction without having to administer eCG. However, eCG is important to induce multiple births. Academic Journals 2012-05-08 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/25423/1/25423.pdf Hesam, Nasser Saleh Obad and Haron, Abd Wahid and Saharee, Abdul Aziz and Abu Bakar @ Zakaria, Md Zuki and Goriman Khan, Mohd Azam Khan and Jabbar, A. G. and Mahfoz, M. A. (2012) Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter. African Journal of Biotechnology, 11 (37). art. no. 72F75CA36339. pp. 9156-9162. ISSN 1684–5315 http://www.academicjournals.org/journal/AJB/article-abstract/72F75CA36339 10.5897/AJB 12.265 |
| spellingShingle | Hesam, Nasser Saleh Obad Haron, Abd Wahid Saharee, Abdul Aziz Abu Bakar @ Zakaria, Md Zuki Goriman Khan, Mohd Azam Khan Jabbar, A. G. Mahfoz, M. A. Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter |
| title | Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter |
| title_full | Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter |
| title_fullStr | Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter |
| title_full_unstemmed | Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter |
| title_short | Effect of different oestrus synchronization protocols on the reproductive efficiency of Dammar indigenous ewes in Yemen during winter |
| title_sort | effect of different oestrus synchronization protocols on the reproductive efficiency of dammar indigenous ewes in yemen during winter |
| url | http://psasir.upm.edu.my/id/eprint/25423/ http://psasir.upm.edu.my/id/eprint/25423/ http://psasir.upm.edu.my/id/eprint/25423/ http://psasir.upm.edu.my/id/eprint/25423/1/25423.pdf |