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Registro Completo
Biblioteca(s):  Embrapa Pantanal.
Data corrente:  07/10/1996
Data da última atualização:  03/04/2017
Autoria:  DOWSETT, K. F.; KNOTT, L. M.; WOODWARD, R. A.; BODERO, D. A. V.
Título:  Seasonal variation in the estrous cycle of mares in the subtropics.
Ano de publicação:  1993
Fonte/Imprenta:  Theriogenology, v.39, n.3, p.631-653, 1993.
Idioma:  Inglês
Conteúdo:  Data on the estrous cycles and sexual receptivity scores of 7 maiden Australian Stock Horse mares were used to study seasonal variation from December until the following November. Mares were grazed in paddocks containing both native and improved tropical pasture species. The study was conducted in South-East Queensland (27 27' South latitude). There were no differences between either the sexual receptivity or the lenghts of natural (Mean = 7.5 days, SEM = 0.4) and PGF-induced estruses (Mean = 7.6 days, SEM = 0.4). Plasma strogens were not related to differences in sexual receptivity scores between mares. The lowest incidence of estrus occurred at the time of the winter solstice (june 22) in the Southern Hemisphere. Winter estruses (Mean = 9.3 days, SEM = 0.8) were longer than those of summer (Mean = 6.6 days, SEM = 0.5) and autum (Mean = 6.6 days, SEM = 0.9). Approximmmmmately 30% of estruses were anovulatory. Most of these occured in autumm and winter (P<0.05). There was considerable variation in the occurrence of anovulatory estrus between mares. There were no differences between th lenghts of ovulatory and anovulatory estruses. Ovulatory estruses were significxantly longer in spring than in summer (P<0.05). There were no seasonal differences between the lenghts of anovulatory estruses. The lenght of diestrus (Mean = 16.6 days, SEM = 0.3) was not affected by mare or season. Only 3 of the 7 mares did not cycle during winter (anaestrus), as confirmed by progesterone concent... Mostrar Tudo
Palavras-Chave:  Anovulatory; Equine; Equino; Mare; Season.
Thesagro:  Égua; Reprodução.
Thesaurus NAL:  anestrus; diestrus; estrus; reproduction.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Pantanal (CPAP)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status
CPAP33142 - 1ADCSP - PPSP1501715017

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