Document Detail


Fertility after ovarian follicular wave synchronization and fixed-time natural mating compared to random natural mating in dromedary camels (Camelus dromedarius).
MedLine Citation:
PMID:  22683027     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The objective of the study was to compare the efficiency of two ovarian follicular wave synchronization protocols coupled with fixed-time natural mating with that of random mating in dromedary camels. Dromedaries were assigned randomly to one of the three treatment groups. Group 1 animals (RM; n=46) were mated randomly. Group 2 camels (1×GnRH-FTM; n=46) were given a GnRH analog (Buserelin, 20μg/animal, i.v.; Receptal, Intervet, Holland) at random, then were mated 14 days later. In Group 3 animals (2×GnRH-FTM; n=41), random GnRH analog was followed by repeated GnRH injection 14 days later and fixed-time natural mating on Day 28. Transrectal examination and ultrasonography were performed at weekly intervals to evaluate ovarian follicular status, diagnose ovulation and pregnancy. Blood samples were collected for progesterone determination by ELISA to confirm ovulation and pregnancy. All female dromedaries were assigned randomly to one of thirteen fertile bulls and were bred once on Days 1, 14 and 28 in Groups 1-3, respectively. Ovarian follicular status and ovulation rate was similar among groups at the start of the study. Seventy-five of the 133 dromedaries (56.4%) ovulated after random natural mating or random GnRH treatment. Mean length of mating was 386±17.8 (±SEM) seconds. There was no significant difference in mating time among groups and in pregnancy rate among dromedary bulls. In Group 3 (2×GnRH-FTM), ovarian follicular status before mating (P<0.05), ovulation rate (n=37, 90.2%, P<0.001) and pregnancy rate at 21 and 60 days (PR 21 days n=22, 53.7% and PR 60 days n=19, 46.3%, P<0.05) were greater compared to random natural mating (Group 1: OR n=25, 54.3%, PR 21 days n=13, 28.3% and PR 60 days n=12, 26.1%). In Group 2 dromedaries (1×GnRH-FTM), treatment tended to improve follicular status before mating, ovulation rate (n=34, 73.9%) and pregnancy rate at 21 and 60 days (PR 21 days n=21, 45.7% and PR 60 days n=16, 34.8%), but the effect was not significant compared to random natural mating. In conclusion, this is the first study demonstrating that favorable pregnancy rate can be achieved following ovarian follicular wave synchronization with repeated GnRH analog and fixed-time natural mating at 14 days intervals in dromedary camels.
Authors:
P Nagy; J Juhasz
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-24
Journal Detail:
Title:  Animal reproduction science     Volume:  -     ISSN:  1873-2232     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-6-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7807205     Medline TA:  Anim Reprod Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
Affiliation:
Emirates Industries for Camel Milk and Products, P.O. Box 294236 Dubai, United Arab Emirates.
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