Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/929671
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dc.contributor.authorCAVALCANTI, A. dos S.pt_BR
dc.contributor.authorBRANDÃO, F. Z.pt_BR
dc.contributor.authorNOGUEIRA, L. A. G.pt_BR
dc.contributor.authorFONSECA, J. F. dapt_BR
dc.date.accessioned2012-07-27T11:11:11Zpt_BR
dc.date.available2012-07-27T11:11:11Zpt_BR
dc.date.created2012-07-27pt_BR
dc.date.issued2012pt_BR
dc.identifier.citationRevista Brasileira de Zootecnia, Viçosa, MG, v. 41, n. 6, p. 1412-1418, Jun. 2012.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/929671pt_BR
dc.descriptionAbstract: The objective of this study was to verify the effects of GnRH on ovulation and pregnancy of ewes subjected to a short-term synchronization of estrus. Santa Inês and crossbred Santa Inês/Dorper ewes received 60 mg MAP sponges during 6 days plus 300 IU eCG and 30 µg d-cloprostenol 24 h prior to sponge withdrawal (SW). Ewes were assigned to receive 0.9% NaCl solution (Tcontrol; n = 32) or 25 µg GnRH (licerelin, TGnRH; n = 34) 24 hours after SW. Each group was assigned to intrauterine insemination by laparoscopy (n = 25) or to natural mating (n = 41). Artificial insemination was performed with a single dose of fresh semen. For controlled mating, females were exposed to males 12, 24, 36 and 48 hours after SW. Ten females per treatment were subjected to transrectal ultrasound examination at 12-hour intervals (SW to 60 hours after). Estrous response (100.0% vs 95.2%), interval from SW to estrus (32.9±7.4 vs 29.8±6.9 hours), estrous length (37.4±9.0 vs 31.5±10.4 hours), pregnancy rates (57.0% vs 41.0%), ovulation rate (100.0% vs 90.0%), number of ovulations/ewe (1.1±0.3 vs 1.2±0.4), maximum follicular diameter (6.4±0.7 vs 6.1±0.6 mm), interval from SW to ovulation (59.1±3.5 vs 58.4±3.5 hours) did not differ between Tcontrol and TGnRH, respectively. Administration of GnRH 24 hours after SW does not improve ovulation or pregnancy rate in estrous synchronization in ewes.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectRaça Santa Inêspt_BR
dc.subjectIntravaginal progesterone insertpt_BR
dc.subjectTaxa de prenhezpt_BR
dc.subjectOestrus synchronizationpt_BR
dc.titleEffects of GnRH administration on ovulation and fertility in ewes subjected to estrous synchronization.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2015-05-26T11:11:11Zpt_BR
dc.subject.thesagroOvinopt_BR
dc.subject.thesagroReprodução animalpt_BR
dc.subject.thesagroInseminação artificialpt_BR
dc.subject.thesagroProgesteronapt_BR
dc.subject.thesagroSincronização do ciopt_BR
dc.subject.thesagroCiclo estralpt_BR
dc.subject.thesagroOvulaçãopt_BR
dc.subject.nalthesaurusSheeppt_BR
dc.subject.nalthesaurusArtificial inseminationpt_BR
dc.subject.nalthesaurusOvulationpt_BR
dc.subject.nalthesaurusProgesteronept_BR
dc.subject.nalthesauruspregnancy ratept_BR
riaa.ainfo.id929671pt_BR
riaa.ainfo.lastupdate2015-05-26pt_BR
dc.identifier.doihttp://dx.doi.org/10.1590/S1516-35982012000600014pt_BR
dc.contributor.institutionAmanda dos Santos Cavalcanti, Pós-graduação, Universidade Federal Fluminense, Niterói, RJ, Brasil.; Felipe Zandonadi Brandão, UFF, Niterói, RJ.; Luiz Altamiro Garcia Nogueira, UFF, Niterói, RJ.; JEFERSON FERREIRA DA FONSECA, CNPC.pt_BR
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