Annual characteristics of estrous activity in wool and hair ewe lambs under subtropical conditions

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniv Franca-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorRodrigues, Paula de Almeida-
Autor(es): dc.creatorCoelho, Lia de Alencar-
Autor(es): dc.creatorNonaka, Keico Okino-
Autor(es): dc.creatorSasa, Aya-
Autor(es): dc.creatorRussiano Vicente, Wilter Ricardo-
Autor(es): dc.creatorCarvalho Balieiro, Julio Cesar de-
Autor(es): dc.creatorSiqueira, Edson Ramos de-
Data de aceite: dc.date.accessioned2022-02-22T00:07:10Z-
Data de disponibilização: dc.date.available2022-02-22T00:07:10Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2007-09-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/195882-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/195882-
Descrição: dc.descriptionThe increased emphasis placed on lamb production in Brazil points to the need for a better knowledge of the annual pattern of reproductive activity in ewe lambs. This study evaluates the annual estrous activity pattern of hair and wool ewe lambs raised in southeast Brazil. Estrous characteristics were recorded for 12 months in ten Santa Ines and 21 Romney Marsh and Suffolk ewe lambs. Santa Ines ewe lambs exhibited a greater length of the normal estrous cycle ( 14 to 19 days) than Romney Marsh and Suffolk ewe lambs ( 17.0 +/- 0.1 days vs. 16.5 +/- 0.2 and 15.9 +/- 0.2 days). All the ewe lambs presented a greater number of periods of estrus per animal per month for single estrous cycles ( up to 26 days) during autumn and winter. During spring and summer there was a reduction of this number but this decline varied according to the breed. For Santa Ines ewe lambs the reduction was only significant in the summer. For wool ewe lambs the reduction was significant in both seasons but was more accentuated for Romney Marsh. The Romney Marsh ewe lambs had a more restricted breeding season than Suffolk and both presented optimal estrus activity in autumn and winter. Santa Ines ewe lambs had a continuous distribution of estrous cycles along the year, although presenting a reduction in the number of estrous periods in the summer. The ewe lambs of three breeds presented characteristics of sexual immaturity, like irregular estrous cycles and silent ovulations.-
Descrição: dc.descriptionUniv Franca, Dept Med Vet, BR-14404600 Franca, SP, Brazil-
Descrição: dc.descriptionUniv Sao Paulo, FZEA, Dept Zootecnia, BR-13635900 Pirassumunga, SP, Brazil-
Descrição: dc.descriptionUniv Fed Sao Carlos, Dept Ciencias Fisiol, BR-13565905 Sao Carlos, SP, Brazil-
Descrição: dc.descriptionUNESP, FCAV, Dept Med Veterinaria Preventiva & Reproducao Anim, BR-14884900 Jaboticabal, SP, Brazil-
Descrição: dc.descriptionUNESP, FMVZ, Dept Producao Anim, BR-18618000 Botucatu, SP, Brazil-
Descrição: dc.descriptionUNESP, FCAV, Dept Med Veterinaria Preventiva & Reproducao Anim, BR-14884900 Jaboticabal, SP, Brazil-
Descrição: dc.descriptionUNESP, FMVZ, Dept Producao Anim, BR-18618000 Botucatu, SP, Brazil-
Formato: dc.format468-475-
Idioma: dc.languageen-
Publicador: dc.publisherUniv Sao Paolo-
Relação: dc.relationScientia Agricola-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectbreeds-
Palavras-chave: dc.subjectestrous cycle-
Palavras-chave: dc.subjectsheep-
Palavras-chave: dc.subjectsubtropics-
Palavras-chave: dc.subjectseasonality-
Título: dc.titleAnnual characteristics of estrous activity in wool and hair ewe lambs under subtropical conditions-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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