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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
08/06/2016 |
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Data da última atualização: |
10/01/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
TEIXEIRA, T. A.; FONSECA, J. F. da; SOUZA-FABJAN, J. M. G. de; CARVALHEIRA, L. de R.; FERNANDES, D. A. de M.; BRANDÃO, F. Z. |
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Afiliação: |
TARCÍSIO ALVES TEXEIRA, FLUMINENSE FEDERAL UNIVERSITY; JEFERSON FERREIRA DA FONSECA, CNPC; JOANNA MARIA GONÇALVES DE SOUZA-FABJAN, FLUMINENSE FEDERAL UNIVERSITY; LUCIANO DE REZENDE CARVALHEIRA, FLUMINENSE FEDERAL UNIVERSITY; DANIEL ANDREWS DE MOURA FERNANDES, FLUMINENSE FEDERAL UNIVERSITY; FELIPE ZANDONADI BRANDÃO, FLUMINENSE FEDERAL UNIVERSITY. |
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Título: |
Efficiency of different hormonal treatments for estrus synchronization in tropical Santa Inês sheep. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Tropical Animal Health and Production, Heidelberg, v. 48, n. 3, p. 545-551, Mar. 2016. |
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DOI: |
10.1007/s11250-015-0989-y |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The aim of this study was to evaluate the effect of (i) the duration of hormone treatment with progestogen sponges during the seasonal anestrus and (ii) the administration of two doses of prostaglandin at 7 days apart during the breeding season on reproductive parameters of Santa Inês ewes. In experiment 1, 32 ewes received intravaginal MAP sponges for 6 (G6 days), 9 (G9 days), or 12 (G12days) days and 75 ?g D-cloprostenol i.m. and 300 IU eCG i.m. 1 day before sponge removal. In experiment 2, 23 ewes received two doses of 0.48-mg sodium cloprostenol i.m. 7 days apart. Ovarian follicular dynamic was assessed through transrectal ultrasonography. Blood samples were collected daily to determine progesterone concentrations. In experiment 1, estrus and ovulation rates did not differ (P?>?0.05) among protocols and between cyclic and acyclic ewes at the beginning of the experiment. The G9 days treatment showed a lower dispersion of ovulations in relation to onset of estrus when compared to G6 days and G12 days. In experiment 2, all ewes exhibit estrus and ovulated after the second dose of prostaglandin, although ewes that were in diestrus at D0 showed subluteal concentrations of progesterone during the follicle development stage of the treatment. In conclusion, the use of progestogen device during 9 days promotes lower dispersion of ovulation when compared to its use for 6 or 12 days, and the protocol of two doses of prostaglandin 7 days apart synchronizes estrus efficiently but results in follicular development under low progesterone concentrations. MenosAbstract: The aim of this study was to evaluate the effect of (i) the duration of hormone treatment with progestogen sponges during the seasonal anestrus and (ii) the administration of two doses of prostaglandin at 7 days apart during the breeding season on reproductive parameters of Santa Inês ewes. In experiment 1, 32 ewes received intravaginal MAP sponges for 6 (G6 days), 9 (G9 days), or 12 (G12days) days and 75 ?g D-cloprostenol i.m. and 300 IU eCG i.m. 1 day before sponge removal. In experiment 2, 23 ewes received two doses of 0.48-mg sodium cloprostenol i.m. 7 days apart. Ovarian follicular dynamic was assessed through transrectal ultrasonography. Blood samples were collected daily to determine progesterone concentrations. In experiment 1, estrus and ovulation rates did not differ (P?>?0.05) among protocols and between cyclic and acyclic ewes at the beginning of the experiment. The G9 days treatment showed a lower dispersion of ovulations in relation to onset of estrus when compared to G6 days and G12 days. In experiment 2, all ewes exhibit estrus and ovulated after the second dose of prostaglandin, although ewes that were in diestrus at D0 showed subluteal concentrations of progesterone during the follicle development stage of the treatment. In conclusion, the use of progestogen device during 9 days promotes lower dispersion of ovulation when compared to its use for 6 or 12 days, and the protocol of two doses of prostaglandin 7 days apart synchronizes estrus efficient... Mostrar Tudo |
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Palavras-Chave: |
Cyclicity; Native breed; Progesteron; Prostaglandin; Raça Santa Inês. |
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Thesagro: |
Hormônio animal; Ovelha; Ovino; Progesterona; Prostaglandina; Reprodução. |
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Thesaurus Nal: |
Ewes; Periodicity; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| 8. |  | MORAIS, I. S. de; REIS, V. R.; SOUZA, G. B. de; AMARAL, A. C.; OLIVEIRA, R. G. de S. de; JERONIMO, G. T.; O'SULLIVAN, F. L. A. Effects of mesterolone on the sex ratio, physiology and liver function of juvenile tambaqui (Colossoma macropomum). Aquaculture, v. 592, 741210, 2024.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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