Document Detail

Response of fat-tailed Syrian Awassi ewes to accelerated lambing systems.
MedLine Citation:
PMID:  21526356     Owner:  NLM     Status:  Publisher    
Fifty cyclic fat-tailed Syrian Awassi ewes aged 2-4 years, with a mean weight of 51.4 kg, were used for 4 years to assess the accelerated lambing system (three lambings in 2 years). Ewes were divided into two groups: treated (T) and untreated (C). Ewes in the T group were treated with flugestone acetate for 14 days and injected intramuscularly at sponge withdrawal with 500 IU of equine chorionic gonadotropin (eCG). Results indicated that ewes in the T group exhibited oestrus and were mated within 5 days post sponge removal compared to 11 days for ewes in the C group, and the difference in oestrus response between the two groups was significant (P < 0.001). Repeated hormonal treatments had no significant (P > 0.05) effect on the lamb birth weight. However, significant (P < 0.001) differences in the lamb birth weight were observed between singles and multiple births. In the treated ewes, the total number of lambs born was 211-157 parturitions, and the multiple birth rate reached 27.4%, whereas the rate in the untreated group was 6.3% with the difference being significant (P < 0.05). In the untreated ewes, the total number of lambs born was 14-13 parturitions (12 singles and 1 twin). Fecundity rates were 135.1% and 106.3% in the treated and untreated ewes, respectively, and the difference was significant (P < 0.05). Repeated administration of eCG had no negative effect on fertility of Syrian Awassi ewes. However, anti-eCG antibodies were produced following eCG injections with extremely high individual differences in the immune response among ewes.
Moutaz Zarkawi
Related Documents :
21178606 - Fluoroscopic stellate ganglion block for postmastectomy pain: a comparison of the class...
1898256 - Implantation of human fetal ventral mesencephalon to the right caudate nucleus in advan...
21289276 - Sequential volume reduction with capsular plications: relationship between cumulative s...
21501296 - Pathological spectrum of intrahepatic cholangiocarcinoma arising in non-biliary chronic...
11309056 - Outcomes of submandibular duct re-implantation for sialorrhoea.
19617756 - Evaluation of the use of posterior tibial nerve stimulation for the treatment of fecal ...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-28
Journal Detail:
Title:  Tropical animal health and production     Volume:  -     ISSN:  1573-7438     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1277355     Medline TA:  Trop Anim Health Prod     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Division of Animal Production, Department of Agriculture, Atomic Energy Commission, P. O. Box 6091, Damascus, Syria,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  A phase II study of the halichondrin B analog eribulin mesylate in gemcitabine refractory advanced p...
Next Document:  Prevalence of neuropathic pain among black African patients suffering from common low back pain.