Data/hora: 22/06/2024 02:16:52

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 08/05/2001
Data da última atualização: | 28/01/2019
Autoria: | VIANA, J. H. M.; FERREIRA, A. de M.; SÁ, W. F. de; CAMARGO, L. S. de A.
Afiliação: | JOAO HENRIQUE MOREIRA VIANA, CNPGL; ADEMIR DE MORAES FERREIRA, CNPGL; WANDERLEI FERREIRA DE SÁ, CNPGL; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL.
Título: | Follicular dynamics in zebu cattle.
Ano de publicação: | 2000
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 12, p. 2501-2509, dez. 2000
Idioma: | Inglês
Notas: | Título em português: Dinâmica folicular em vacas zebuínas.
Conteúdo: | The aim of this study was to investigate the follicular dynamics during estrous cycle in Gir breed (Bos indicus) cows. Follicular growth and atresia during estrous cycle were evaluated using a portable ultrasound device. Luteal activity was evaluated by serum progesterone levels. Cycles with two (6.67%), three (60.00%), four (26.67%) and five (6.67%) follicular waves were observed. There was no difference (P>0.05) in dominant or subordinate follicles growth or atresia rates among follicular waves. The maximum diameter of the ovulatory follicle was higher than the diameter of the other dominant follicles in cycles with four waves, and higher than the diameter of the second dominant follicle in cycles with three waves (P<0.05). There was no difference (P>0.05) in estrous cycle length (21.11±1.76 and 22.25±1.71 days) or progesterone levels during diestrous (4.48±1.45 and 5.08±1.40 ng/mL) between cycles with three or four waves. Follicular dynamics in Gir cattle is characterized by a higher incidence of cycles with three or four waves, associated with a low persistence of the dominant follicle.
Palavras-Chave: | Bovines; Folículo ovariano; Gir breed; Oestrous cycle; Raça Gir; Ultra-som.
Thesagro: | Bovino; Ciclo Estral; Ovário.
Thesaurus Nal: | Animal ovaries; Beef cattle; Ovarian follicles; Ultrasonics.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/18896/1/pab99_159.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (18896-1) - UPE - AP - PP - 630.72081 - P474 - AP - DIS