Oestrus Synchronization by Short and Long-Term Intravaginal Sponge Treatment in Lactating Goats During the Breeding Season: The Effects of GnRH Administrations Immediately after Matings on Fertility

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dc.contributor.authorSaribay, Mustafa Kemal
dc.contributor.authorKaraca, Fikret
dc.contributor.authorDogruer, Gokhan
dc.contributor.authorErgun, Yasar
dc.contributor.authorYavas, Ilker
dc.contributor.authorAtes, Cafer Tayyar
dc.date.accessioned2024-09-18T20:52:50Z
dc.date.available2024-09-18T20:52:50Z
dc.date.issued2011
dc.departmentHatay Mustafa Kemal Ãœniversitesien_US
dc.description.abstractThe present study was aimed at oestrus synchronization by applying progestagen-impregnated intravaginal sponges for either 7 or 12 days to lactating goats during the breeding season and at the determination of the effects of post-mating GnRH injection on fertility. The study was conducted in 80 hair goats aged between 2-5 years. The goats were allocated to two equal groups, one of which was applied short-term intravaginal sponge treatment and the other long-term treatment. The duration of intravaginal sponge treatment was 7 days in the short-term group (ST, n = 40) and 12 days in. the long-term group (LT, n = 40). Furthermore, on the day of intravaginal sponge removal, the goats received intramuscular injections of 400 IU of PMSG and 0.075 mg of cloprostenol. In both groups, 12 h after the removal of the vaginal sponges, 10 fertile bucks were introduced into the flock for oestrus detection twice a day and goats which were determined to be in oestrus were hand-mated to the assigned bucks. Immediately after mating, the goats included in each of the ST and LT groups were randomly assigned to two subgroups, referred to as ST1 (n = 18), ST2 (n = 18), LT1 (n = 18) and LT2 (n = 18). The subgroups ST1 and LT1 were maintained as controls whilst the subgroups ST2 and LT2 were administered with 5 meg of bucerelin acetate immediately after mating. In the present study, the times of oestrus onset and oestrus rates in the ST and LT groups were determined as 33.3 +/- 1.4 and 35.0 +/- 1.4 h and 94.7 and 97.2%, respectively. The differences observed between the two groups for the time of oestrus onset and oestrus rate were statistically insignificant (p>0.05). In the subgroups ST1, ST2, LT1 and LT2, pregnancy rates were determined as 55.5, 50, 50 and 55.5%, respectively whilst the parturition rate of all four subgroups was 100%. Furthermore, litter sizes were detected as 150, 200, 188 and 170% in the subgroups ST1, 5T2, LT1 and LT2, respectively. The differences observed between the subgroups for pregnancy rate, parturition rate and litter size were statistically insignificant (p>0.05). In conclusion, it was demonstrated in the present study that GnRH administrations immediately after mating to lactating goats in which oestrus synchronization was performed by means of short and long-term intravaginal sponge treatment during the breeding season did not improve pregnancy rate, parturition rate and litter size.en_US
dc.identifier.endpage3139en_US
dc.identifier.issn1680-5593
dc.identifier.issn1993-601X
dc.identifier.issue23en_US
dc.identifier.startpage3134en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12483/11439
dc.identifier.volume10en_US
dc.identifier.wosWOS:000298097200019en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherMedwell Onlineen_US
dc.relation.ispartofJournal of Animal and Veterinary Advancesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectOestrus synchronizationen_US
dc.subjectgoaten_US
dc.subjectfluorogestone acetateen_US
dc.subjectGnRHen_US
dc.subjectpregnancyen_US
dc.subjectrateen_US
dc.subjectTurkeyen_US
dc.titleOestrus Synchronization by Short and Long-Term Intravaginal Sponge Treatment in Lactating Goats During the Breeding Season: The Effects of GnRH Administrations Immediately after Matings on Fertilityen_US
dc.typeArticleen_US

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