Data/hora: 25/06/2024 01:25:35

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 05/02/2018
Data da última atualização: | 11/10/2018
Autoria: | ALMEIDA, S. F. de C. M. de; SOUZA-FABJAN, J. M. G.; BALARO, M. F. A.; BRAGANÇA, G. M.; PINTO, P. H. N.; ALMEIDA, J. G. de; MOURA, A. B. B.; FONSECA, J. F. da; BRANDÃO, F. Z.
Afiliação: | Sheylla Foligno de Carvalho Menezes de Almeida, Faculty of Veterinary Medicine, Fluminense Federal University (UFF) - Niterói, RJ, Brazil; Joanna Maria Gonçalves Souza-Fabjan, UFF - Niterói, RJ, Brazil; Mario Felipe Alvarez Balaro, UFF - Niterói, RJ, Brazil; Gláucia Mota Bragança, UFF - Niterói, RJ, Brazil; Pedro Henrique Nicolau Pinto, UFF - Niterói, RJ, Brazil; José Gabriel de Almeida, UFF - Niterói, RJ, Brazil; Ana Beatriz Bossois Moura, UFF - Niterói, RJ, Brazil; Jeferson Ferreira da Fonseca, CNPC; Felipe Zandonadi Brandão, UFF - Niterói, RJ, Brazil.
Título: | Use of two doses of cloprostenol in different intervals for estrus synchronization in hair sheep under tropical conditions.
Ano de publicação: | 2018
Fonte/Imprenta: | Tropical Animal Health and Production, Edinburgh, v. 50, n. 2, p. 427-432, Feb. 2018.
DOI: | 10.1007/s11250-017-1454-x.
Idioma: | Inglês
Conteúdo: | Abstract: This study evaluated the effect of two doses of prostaglandin at different intervals on reproductive parameters of crossbred ewes. In Experiment 1, 30 ewes received two doses of 120 ?g cloprostenol at 7 (G 7 days), 9 (G 9 days), or 11.5 (G 11.5 days) days apart. Ultrasound assessments were performed from the first and second cloprostenol administration for 5 days or ovulation detection. Estrus signs were checked by a teaser male. Plasma progesterone concentration was measured before each cloprostenol dose. In Experiment 2, 95 ewes were allocated into the same treatments and after the second dose, ewes in estrus were mated. At 30 days after breeding, pregnancy diagnosis was conducted and prolificacy was evaluated at lambing. In Experiment 1, at the first cloprostenol administration, 50% of ewes had an active CL and all showed estrus. At the second administration, 66.7% of ewes had an active CL and one did not present estrus. There was no difference (P > 0.05) after the second dose for as follows: overall estrous response (90%), interval from cloprostenol administration to estrous onset (42.0 ± 4.9 h), estrus duration (31.5 ± 2.1 h), ovulation rate (100.0%), and number of ovulations (1.5 ± 0.3). In Experiment 2, both pregnancy and prolificacy rates were similar (P > 0.05) for G 7 days (73.3; 145%), G 9 days (75.9; 125%), or G 11.5 days (75.9; 145%), leading to an overall pregnancy rate of 75.0% (66/88) and prolificacy rate of 137%. Therefore, the three treatments proposed were able to promote high pregnancy and prolificacy rates in crossbred ewes.
Palavras-Chave: | Brasil; Breeding seasons; Cyclicity; Indigenous organisms; Oestrous cycle; Oestrus synchronization; Prolificacy; Prolificidade; Santa Inês; Taxa de prenhez.
Thesagro: | Ciclo estral; Ovelha; Ovino; Progesterona; Prostaglandina; Reprodução animal; Sincronização do cio.
Thesaurus Nal: | Brazil; Dorper; Ewes; Ovulation; Pregnancy; pregnancy rate; Progesterone; Prostaglandins; Reproduction; Sheep.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (36280-1) - UPC - AP - DD -  -  -  - DIS