Data/hora: 23/06/2024 07:08:12

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 09/12/2019
Data da última atualização: | 09/12/2019
Autoria: | BONATO, G. C.; MAIA, A. L. R. S.; CÔRTES, L. R.; OLIVEIRA, T. A.; ARRAIS, A. M.; FIGUEIRA, L. M.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Afiliação: | Pós-graduação - Universidade Federal de Viçosa (UFV) - Viçosa, MG, Brazil; Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Universidade Presidente Antônio Carlos (UNIPAC) - Juiz de Fora, MG, Brazil; Universidade Federal Rural do Rio de Janeiro (UFRRJ) - Seropédica, RJ, Brazil; Universidade Federal de Lavras (UFLA) - Lavras, MG, Brazil; Universidade Estadual Paulista (Unesp) - Jaboticabal, SP, Brazil; Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC.
Título: | Effects of d-cloprostenol administrations with 7.5 and 11.5-day intervals between administrations on pregnancy rates after artificial insemination in estrous cyclic dairy goats.
Ano de publicação: | 2019
Fonte/Imprenta: | Animal Reproduction Science, v. 209, article 106172, Oct. 2019.
DOI: | 10.1016/j.anireprosci.2019.106172
Idioma: | Inglês
Conteúdo: | Abstract: This study was conducted to evaluate effects of two administrations of d-cloprostenol at different intervals to synchronize the time of estrus and ovulation among estrous cyclic goats. In Experiment 1, 32 does were treated with 30??g?d-cloprostenol at 7.5 (T7.5, n = 16) or 11.5-day (T11.5, n = 16) intervals. In Experiment 2, the same treatments were administered and there was AI of the does (T7.5, n = 40 and T11.5, n = 38). In Experiment 1, ultrasonic assessments of ovaries were conducted at the time of the second administration of d-cloprostenol, every 12?h until detection of ovulation, and 7 days after estrous onset to detect the corpora lutea, as well as for pregnancy diagnosis 40 days after AI. In Experiment 1, the estrous response (90.6%, 29/32) was similar (P?>?0.05) in both groups. Diameter of the largest follicle at the time of administration of the second dose was larger (P = 0.01) in the T7.5 than T11.5 group (7.0 compared with 5.7?mm), while the values for ovarian variables were similar (P?>?0.05). In Experiment 2, the greatest (P?<?0.001) synchrony in timing of initiation of estrus in does (T7.5 = 83.3% and T11.5 = 50.0%) occurred after the second day (36-48?h). The pregnancy rate tended (P = 0.0836) to be greater for does in the T7.5 (71.4%, 40/56) than T11.5 (55.6%, 30/54) group. With use of both protocols, there were acceptable estrous synchronization and pregnancy rates in estrous cyclic dairy goats.
Palavras-Chave: | AI; Estrous synchrony.
Thesaurus Nal: | Animal reproduction; Artificial insemination; Estrus synchronization; Goats; Ovulation; Ultrasonography.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39348-1) - UPC - AP - DD -  -  -  - DIS