Organic breeding in Sarda ewes: Utilization of the ram effect in an artificial insemination program

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dc.contributor.authorMayorga I.
dc.contributor.authorMourad R.
dc.contributor.authorMara L.
dc.contributor.authorGallus M.
dc.contributor.authorUlutaş Z.
dc.contributor.authorDattena M.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2019
dc.departmentNiğde ÖHÜ
dc.description.abstractThe current study assesses the ram effect as an alternative to conventional hormonal treatment for estrus synchronization prior to artificial insemination. Two groups of 50 anoestrus Sarda ewes were induced to ovulate with adult rams (RE group) or synchronized using intravaginal sponges impregnated with progestogen and equine chorionic gonadotropin (eCG) (PRO group). Ewes in the RE group were isolated from rams for 6 weeks. After the isolation period, 5 vasectomized rams were introduced into the flock at a ratio of 1 ram/10 females (day 0) to induce estrus and ovulation. Ewes in both experimental groups were inseminated via the cervical route with fresh semen (400 million spermatozoa/0.25 ml) 24 h after the onset of estrus (day 15–24). The pregnancy rate, assessed by ultrasound 35 days after insemination, was 48.9% (24/49) and 43.47% (22/50) for sheep in RE and PRO groups respectively. Lambing rates were identical to pregnancy rates in both groups, while the prolificacy rate was 120% (59/49) and 130% (65/50) in RE and PRO groups respectively. No significant differences were found between the 2 groups. The data supports the conclusion that the ram effect can be used successfully to synchronize estrus in organic farming operations. © 2019 Elsevier B.V.
dc.description.sponsorshipAgricultural Research Development Agency
dc.description.sponsorshipThe authors address their thanks to the Agricultural Research Agency of Sardinia, Department of Animal Science (Agris-Sardegna, DIRPA) for financial support. At the same time the authors thank Dr. Debbie Gillette, veterinary pathologist for critical reading and english editing.
dc.identifier.doi10.1016/j.smallrumres.2019.03.018
dc.identifier.endpage134
dc.identifier.issn0921-4488
dc.identifier.scopus2-s2.0-85063725568
dc.identifier.scopusqualityQ2
dc.identifier.startpage131
dc.identifier.urihttps://dx.doi.org/10.1016/j.smallrumres.2019.03.018
dc.identifier.urihttps://hdl.handle.net/11480/1485
dc.identifier.volume174
dc.identifier.wosWOS:000467890900022
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.ispartofSmall Ruminant Research
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectArtificial insemination
dc.subjectFresh semen
dc.subjectProgestagen treatment
dc.subjectRam effect
dc.titleOrganic breeding in Sarda ewes: Utilization of the ram effect in an artificial insemination program
dc.typeArticle

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