Data/hora: 25/06/2024 05:40:14

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 16/05/2017
Data da última atualização: | 16/05/2017
Autoria: | MAIA, A. L. R. S.; BRANDÃO, F. Z.; SOUZA-FABJAN, J. M. G.; BALARO, M. F. A.; OLIVEIRA, M. E. F.; FACO, O.; FONSECA, J. F. da.
Afiliação: | Fluminense Federal University (UFF) - Niterói, RJ, Brazil; UFF - Niterói, RJ, Brazil; UFF - Niterói, RJ, Brazil; UFF - Niterói, RJ, Brazil; São Paulo State University (USP)- Jaboticabal, SP, Brazil; OLIVARDO FACO, CNPC; JEFERSON FERREIRA DA FONSECA, CNPC.
Título: | Reproductive parameters of dairy goats after receiving two doses of d-cloprostenol at different intervals.
Ano de publicação: | 2017
Fonte/Imprenta: | Animal Reproduction Science, v. 1981, p. 16-23, June, 2017.
DOI: | 10.1016/j.anireprosci.2017.02.013
Idioma: | Inglês
Conteúdo: | Abstract: This study evaluated the efficiency of two d-cloprostenol injections at different intervals on the reproductive parameters of dairy goats. Trial 1 comprised 54 goats allocated to receive two 37.5?g d-cloprostenol doses at intervals of seven (T7, n=19), 10 (T10, n=18), and 11.5 (T11.5, n=17) days. Trial 2 comprised 62 goats allocated to receive injections at T7 (n=30) and T11.5 (n=32). Ultrasonography was done and blood was collected just before d-cloprostenol injections. After the second dose, goats were artificially inseminated (AI) with frozen-thawed semen at 18-24h (Trial 1) or at 10-24h (adjusted according to the time of estrus onset in Trial 2) after estrus detection. Estrus response rate did not differ (P>0.05) among groups in Trials 1 (T7=94.7%; T10=88.9%; T11.5=88.2%) and 2 (T7=90.0%; T11.5=96.9). All females showed progesterone concentrations >1ng/mL before both d-cloprostenol injections. The largest follicle diameter present on ovaries was similar (P>0.05) among treatments at the first and second dose. The second largest follicle diameter was superior (P<0.05) to T7 than to T10 and T11.5 goats at first dose only. This possibly resulted in lower interval to estrus (P<0.05) in T7-treated goats than other treated goats in both trials. The conception rate was similar among treatment groups in Trials 1 (T7=55.6%; T10=18.8%; T11.5=26.7%) and 2 (T7=85.2%; T11.5=93.6%). The three treatments efficiently synchronized estrus. T7 and T11.5 protocols resulted in high estrus synchrony and conception rates when adjusting the AI time according to interval of estrus.
Palavras-Chave: | Oestrous cycle; PGF 2 alpha; PGF2 alpha analog; Synchronization; Synchronized females.
Thesagro: | Caprino; Ciclo estral; Eficiência reprodutiva; Inseminação artificial; Prostaglandina; Sincronização do cio.
Thesaurus Nal: | Artificial insemination; cloprostenol; Goats; Prostaglandins; Reproductive performance.
Categoria do assunto: | --
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (33563-1) - UPC - AP - DD -  -  -  - DIS