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Male effect in Churra Galega Bragançana and Suffolk ewes under long-day artificial photoperiod

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dc.contributor.authorAzevedo, Jorge
dc.contributor.authorCorreia, Teresa Montenegro
dc.contributor.authorValentim, Ramiro
dc.contributor.authorAlmeida, José Carlos
dc.contributor.authorSimões, João
dc.contributor.authorGalvão, Lurdes
dc.contributor.authorVelasco, Helena
dc.contributor.authorMaurício, Raimundo
dc.contributor.authorFontes, Paulo
dc.contributor.authorMendonça, Álvaro
dc.contributor.authorCardoso, Manuel
dc.date.accessioned2011-07-15T10:00:26Z
dc.date.available2011-07-15T10:00:26Z
dc.date.issued2007
dc.description.abstractThis study aimed to evaluate the male effect in Churra Galega Bragançana (CGB) and Suffolk (S) ewes under artificial long-day photoperiod (16L:8D). On March 21st, 34 CGB and 27 S ewes, 2-5 years old, were allocated in light control facilities. Two months later, ovarian activity was registered by progesterone concentrations in blood plasma twice weekly. Ovarian activity was controlled by vaginal sponges (FGA). Vasectomised aproned rams were used to induce ram effect and estrus detection. Ewes were observed for estrus twice daily. Ewes presenting ovarian activity were identified by endoscopy. Chi-square tests were performed to compare proportions and Student’s t-tests to compare means of the ovulation rate. After 2 months in 16L:8D photoperiod, 81.5% of Suffolk and 64.7% of CGB ewes were in anestrous (P≤0.01). Male effect was influenced by breed (S vs. CGB) – Estrus: 50.0% vs. 75.0% (P≤0.001) and Ovulation: 18.2% vs. 63.6% (P≤0.001) –, except for ovulation rate (1.0±0.0). Data suggests that male effect is more effective in CGB than in Suffolk ewes.por
dc.identifier.citationAzevedo, J.; Correia, Teresa; Valentim, Ramiro; Almeida, J.; Simões, J.; Galvão, Lurdes; Velasco, Helena; Maurício, Raimundo; Fontes, P.; Mendonça, Álvaro; Cardoso, Manuel (2007) – Male effect in Churra Galega Bragançana and Suffolk ewes under long-day artificial photoperiod. In Book of Abstracts of the 58th Annual Meeting of The European Association for Animal Production. Dublin. ISBN 978-90-8686-045-6por
dc.identifier.isbn978-90-8686-045-6
dc.identifier.urihttp://hdl.handle.net/10198/5875
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherEuropean Federation of Animal Science (EAAP)por
dc.titleMale effect in Churra Galega Bragançana and Suffolk ewes under long-day artificial photoperiodpor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceDublin, Irlandapor
oaire.citation.endPage125por
oaire.citation.startPage125por
oaire.citation.titleBook of Abstracts of the 58th Annual Meeting of The European Association for Animal Productionpor
person.familyNameCorreia
person.familyNameValentim
person.familyNameMaurício
person.familyNameMendonça
person.givenNameTeresa Montenegro
person.givenNameRamiro
person.givenNameRaimundo
person.givenNameÁlvaro
person.identifier.ciencia-id1610-5AFD-75A1
person.identifier.ciencia-idB01B-96FF-D524
person.identifier.ciencia-id8A1F-7B31-A119
person.identifier.orcid0000-0002-9640-8320
person.identifier.orcid0000-0002-3514-988X
person.identifier.orcid0000-0002-4099-9547
person.identifier.ridK-2190-2014
person.identifier.scopus-author-id36607620800
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
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relation.isAuthorOfPublication7c1f54bd-81e6-45c4-ac4d-6a297ecd0f35
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relation.isAuthorOfPublication.latestForDiscovery7c1f54bd-81e6-45c4-ac4d-6a297ecd0f35

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