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dc.contributorRekik, Mouraden_US
dc.contributorMara, Lauraen_US
dc.contributorGallus, Mariliaen_US
dc.contributorUlutaş, Zaferen_US
dc.contributorDattena, Mariaen_US
dc.creatorMayorga, Isabelen_US
dc.identifier.citationIsabel Mayorga, Mourad Rekik, Laura Mara, Marilia Gallus, Zafer Ulutaş, Maria Dattena. (1/5/2019). Organic breeding in Sarda ewes: utilization of the ram effect in an artificial insemination program. Small Ruminant Research, 174, pp. 131-134.en_US
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.en_US
dc.publisherElsevier (12 months)en_US
dc.sourceSmall Ruminant Research;174,(2019) Pagination 131,134en_US
dc.subjectram effecten_US
dc.subjectfresh semenen_US
dc.subjectprogestagen treatmenten_US
dc.titleOrganic breeding in Sarda ewes: utilization of the ram effect in an artificial insemination programen_US
dc.typeJournal Articleen_US
cg.creator.idRekik, Mourad: 0000-0001-7455-2017en_US
cg.subject.agrovocartificial inseminationen_US
cg.contributor.centerAgenzia per la ricerca in agricoltura , Servizio Ricerca per la Zootecnica - Agris-Sardegnaen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerNigde Ömer Halisdemir University - OHUen_US
cg.contributor.crpCRP on Livestock Agri-Food Systems - LAFSen_US
cg.contributor.funderInternational Livestock Research Institute - ILRIen_US
cg.contributor.projectCGIAR Research Program on Livestock Agri-Food Systemsen_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionSouthern Europeen_US
cg.isijournalISI journalen_US
dc.identifier.statusLimited accessen_US
cg.journalSmall Ruminant Researchen_US

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