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dc.contributor.authorde Moraes, Gentil Vanini-
dc.contributor.authorde Assis Fonseca de Macedo, Francisco-
dc.contributor.authorLourenço, Fábio José-
dc.contributor.authorde Macedo, Filipe Gomes-
dc.contributor.authorRigolon, Luiz Paulo-
dc.contributor.authorde Paula Nogueira, Guilherme-
dc.contributor.authorSantello, Graziela Aparecida-
dc.identifier.citationRevista Brasileira de Zootecnia, v. 42, n. 10, p. 706-712, 2013.-
dc.description.abstractThe incidence of estrus in nulliparous Santa Inês (n = 16), Texel (n = 16) and Ile de France (n = 15) ewes fed two levels of crude protein (CP, 12 or 16%) was monitored from July 2005 to December 2006, and seasonality in the Santa Inês breed in the south of Brazil was characterized. The solar radiation data were recorded daily, and samples of blood were collected biweekly for determination of the plasma concentration of progesterone in Santa Inês lambs at, on average, 11±1 months of age. The female Santa Inês lambs, in the experimental period, stayed among teaser rams with a powdered-dye-ink mixture placed on their chest to mark the females that accepted to be mounted. Santa Inês ewes did not manifest estrus in the firstfortnightofNovemberandinDecember2005,norinthelastfortnightofDecember2006.Estrusactivitywasnotobservedon any of the three breeds in October 2006. Breeds differed at the level of 12% CP. Santa Inês and Ile de France females did not differ as for the probability estrus manifestation and both presented higher probabilities then Texel. When the effect of 12 or 16% CP on each breed was evaluated separately, it was verifiedthatlevelsof12or16%ofcrudeproteindidnotchangethe probability of estrus manifestation in any of the studied breeds. The concentration of plasma progesterone inSanta Inês ewes during the spring of 2005 and 2006 indicated that there is difference between 12% CP (0.68±1.32 ng/mL) and 16% CP (1.28±1.99 ng/mL) and between the years 2005 (0.39±0.78 ng/mL) and 2006 (1.47±2.08 ng/mL), demonstrating the anestrous seasonality of Santa Inês in South Brazil. © 2013 Sociedade Brasileira de Zootecnia.en
dc.titleFrequency of estrus in santa inês, texel and ile de france ewes in the northwest of Paraná state, Brazilen
dc.contributor.institutionUniversidade Estadual de Maringá (UEM)-
dc.contributor.institutionCentro Universitário de Maringá-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal do Amazonas (UFAM)-
dc.description.affiliationDepartamento de Zootecnia Universidade Estadual de Maringá, Maringá, PR-
dc.description.affiliationDepartamento de Medicina Veterinária Centro Universitário de Maringá, Maringá, PR-
dc.description.affiliationPrograma de Pós-Graduação em Zootecnia Universidade Estadual de Maringá, Maringá, PR-
dc.description.affiliationDepartamento de Zootecnia Universidade Estadual Paulista, Botucatu, SP-
dc.description.affiliationInstituto de Ciências Sociais Educação e Zootecnia Universidade Federal do Amazonas, Parintins, AM-
dc.description.affiliationUnespDepartamento de Zootecnia Universidade Estadual Paulista, Botucatu, SP-
dc.rights.accessRightsAcesso aberto-
dc.relation.ispartofRevista Brasileira de Zootecnia-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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