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Fixed-time artificial insemination in extensive cattle

2020Journal article Open access
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dc.contributor.authorDias, Sandra
dc.contributor.authorCarvalho, Joaqum
dc.contributor.authorRodrigues, João Várzea
dc.contributor.authorMartins, Manuel Vicente
dc.date.accessioned2021-02-23T17:14:41Z
dc.date.available2021-02-23T17:14:41Z
dc.date.issued2020
dc.date.updated2021-02-23T16:44:10Z
dc.description.abstractIntroduction: Fixed-time artificial insemination (TAI) is a useful tool in explorations to improve productivity, if ovulation synchronization requirements are met, related to the physical status of females and their reproductive apparatus. The protocol used allows greater success in cases of anestro, inducing cyclicity in cows or non-cyclic heifers, allowing AI at a predetermined time, dispensing with heat detection, in meat cattle in extensive system. Objetives: Improve reproductive performance in beef cattle. Artificial insemination (AI) is an important reproductive technique for the genetic improvement of production animals, as well as a strategy for synchronizing the time of childbirth in a region with periods of food shortage, in quantity and quality. Methods: Exploratory study with quantitative approach. The work carried out between March 2018 and April 2019 where 220 AI were carried out in 8 staff from the Centro and Alentejo region of different genetic bases, diagnosed with pregnancy at 40 days. Results: The gestation rate (%G) for the two years was 55.5% in 2018 (n=178) was 52.8% and 66.7% (n=42) in 2019. Conclusions: The results obtained allow predicting 55% of TG, however an assessment of risk factors involved (climate, feeding, body condition, management) may contribute to an improvement in results.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDias, S., Carvalho, J., Rodrigues, J. V., & Martins, M. V. (2020). Fixed-time artificial insemination in extensive cattle. Millenium, 2(13), 23-28. DOI: 10.29352/mill0213.02.00296pt_PT
dc.identifier.doi10.29352/mill0213.02.00296pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.19/6618
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherinstituto Politécnico de Viseupt_PT
dc.relation.publisherversionhttps://revistas.rcaap.pt/millenium/article/view/19174pt_PT
dc.subjectcattlept_PT
dc.subjectfixed-time artificial inseminationpt_PT
dc.subjectextensive production systemspt_PT
dc.subjectgestation ratept_PT
dc.titleFixed-time artificial insemination in extensive cattlept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceViseupt_PT
oaire.citation.endPage28pt_PT
oaire.citation.issue13pt_PT
oaire.citation.startPage23pt_PT
oaire.citation.titleMilleniumpt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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RE - Série 2, n.º 13: (2020)