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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
26/05/2010 |
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Data da última atualização: |
23/09/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
OLIVEIRA, M. E. F.; NASCIMENTO, P. M. P.; TERIXEIRA, P. P. M.; PIERONI, J. S. P.; LIMA, M. R.; BICUDO, S. D.; FONSECA, J. F. da; VICENTE, W. R. R. |
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Afiliação: |
Universidade Estadual Paulista, Jaboticabal, SP.; UNESP; UNESP; UNESP; UNESP; JEFERSON FERREIRA DA FONSECA, CNPC; UNESP. |
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Título: |
Timing of ovulation and estrus in long protocols with or without CIDR replacement in santa inês sheep during breeding season |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Reproduction, Fertility and Development, v. 22, n. 1, p. 174, 2010. |
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DOI: |
10.1071/RDv22n1Ab33 |
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Idioma: |
Inglês |
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Notas: |
Edição dos Proceedings of the Annual Conference of the International Embryo Transfer Society, Córdoba, Argentina, 9-12 January 2010. |
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Conteúdo: |
Low levels of progesterone (P4) during synchronization of estrus in ewes can promote excessive growth of the follicles, resulting in large persistent and old ovulatory follicles. Timing of ovulation or the LH surge in relation to onset of estrus is also more variable with lower P4. These findings have been related to reduction in fertility in ewes (Viñoles et al. 2001 Theriogenology 55, 993-1004). To avoid prolonged periods of subluteal P4 concentrations, the aim of this study was to compare long protocols with or without CIDR replacement in Santa Inês sheep during the breeding season. Twenty-three adult ewes were divided into 2 groups (G-1CIDR, n = 11 and G-2CIDR, n = 12). Estrus was synchronized with a P4 device (CIDR?; Pfizer-New Zealand, Auckland, New Zealand) for 14 d. However, in G-2CIDR, the CIDR was replaced by a new one on Day 7. Doses of 2.5 mg of dinoprost, i.m. (Lutalyse?, Pfizer-New Zealand) were administered on Days 0 and 14. All ewes received 300 IU of eCG (Novormon?, Syntex, Buenos Aires, Argentina) on Day 14. Estrus detection was accomplished using a teaser ram starting 12 h after CIDR removal and was repeated 3 times a day for 4 d. Ultrasonographic exam was used every 8 h for 5 d after the end of the treatment to determine the moment of ovulation and the diameter of the ovulatory follicle. Data were analyzed by ANOVA using SAS software (chi-square and Tukey tests). The proportions of treated ewes that were detected in estrus did not differ statistically between groups (G-1CIDR: 90.9% and G-2CIDR: 100%). The interval from onset estrus to CIDR removal differed (P < 0.05), between G-1CIDR (37.80 ± 8.02 h) and G-2CIDR (49.00 ± 9.16 h) groups. The frequency distributions of estrus in G-1CIDR ewes were 10, 70, 10, and 10% at 24, 36, 48, and 54 h, respectively, compared with 8.33, 8.33, 50, 8.33, and 25% at 30, 36, 48, 54, and 60 h after CIDR removal in the G-2CIDR ewes. All ewes ovulated at the end of the synchronization protocols. Ovulation occurred at 69.45 ± 10.00 h and 76.66 ± 15.04 h after the end of the protocols in G-1CIDR and G-2CIDR, respectively (P > 0.05). The ovulation frequency distribution for ovulation time in G-1CIDR was 27.27, 54.54, 9.09, and 9.09% at 60, 68, 84, and 92 h, whereas in G-2CIDR, 8.33, 50, 16.66, 8.33, 8.33, and 8.33% ovulated at 60, 68, 76, 92, 100, and 108 h after the end of treatment. The interval between estrus and ovulation was 29.40 ± 9.97 h in G-1CIDR compared with 27.66 ± 11.71 h in G-2CIDR (P > 0.05). The number of ovulations per animal and diameters of ovulatory follicles were 1.54 ± 0.82 and 6.95 ± 0.75 mm in G-1CIDR and 1.33 ± 0.77 and 7.00 ± 1.22 mm in G-2CIDR, respectively (P > 0.05). These results showed a later onset of estrus in G-2CIDR. However, the treatment with CIDR replacement did not promote an effect on ovulation rate and number of ovulatory follicles. Both protocols showed efficiency. MenosLow levels of progesterone (P4) during synchronization of estrus in ewes can promote excessive growth of the follicles, resulting in large persistent and old ovulatory follicles. Timing of ovulation or the LH surge in relation to onset of estrus is also more variable with lower P4. These findings have been related to reduction in fertility in ewes (Viñoles et al. 2001 Theriogenology 55, 993-1004). To avoid prolonged periods of subluteal P4 concentrations, the aim of this study was to compare long protocols with or without CIDR replacement in Santa Inês sheep during the breeding season. Twenty-three adult ewes were divided into 2 groups (G-1CIDR, n = 11 and G-2CIDR, n = 12). Estrus was synchronized with a P4 device (CIDR?; Pfizer-New Zealand, Auckland, New Zealand) for 14 d. However, in G-2CIDR, the CIDR was replaced by a new one on Day 7. Doses of 2.5 mg of dinoprost, i.m. (Lutalyse?, Pfizer-New Zealand) were administered on Days 0 and 14. All ewes received 300 IU of eCG (Novormon?, Syntex, Buenos Aires, Argentina) on Day 14. Estrus detection was accomplished using a teaser ram starting 12 h after CIDR removal and was repeated 3 times a day for 4 d. Ultrasonographic exam was used every 8 h for 5 d after the end of the treatment to determine the moment of ovulation and the diameter of the ovulatory follicle. Data were analyzed by ANOVA using SAS software (chi-square and Tukey tests). The proportions of treated ewes that were detected in estrus did not differ statistically bet... Mostrar Tudo |
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Palavras-Chave: |
Brasil; CIDR; Minas Gerais; Protocolo; Raça Santa Inês. |
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Thesagro: |
Fertilidade; Inseminação artificial; Ovino; Ovulação; Progesterona; Redução; Reprodução animal. |
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Thesaurus Nal: |
Animal reproduction; Controlled internal drug release devices; Progesterone; Sheep. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/61360/1/RAC-Timed-hormonal-treatments-in-induction-and-synchronization-of-Saanen.pdf
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Marc: |
LEADER 04264nam a2200409 a 4500
001 1853911
005 2019-09-23
008 2010 bl uuuu u00u1 u #d
024 7 $a10.1071/RDv22n1Ab33$2DOI
100 1 $aOLIVEIRA, M. E. F.
245 $aTiming of ovulation and estrus in long protocols with or without CIDR replacement in santa inês sheep during breeding season$h[electronic resource]
260 $aReproduction, Fertility and Development, v. 22, n. 1, p. 174, 2010.$c2010
500 $aEdição dos Proceedings of the Annual Conference of the International Embryo Transfer Society, Córdoba, Argentina, 9-12 January 2010.
520 $aLow levels of progesterone (P4) during synchronization of estrus in ewes can promote excessive growth of the follicles, resulting in large persistent and old ovulatory follicles. Timing of ovulation or the LH surge in relation to onset of estrus is also more variable with lower P4. These findings have been related to reduction in fertility in ewes (Viñoles et al. 2001 Theriogenology 55, 993-1004). To avoid prolonged periods of subluteal P4 concentrations, the aim of this study was to compare long protocols with or without CIDR replacement in Santa Inês sheep during the breeding season. Twenty-three adult ewes were divided into 2 groups (G-1CIDR, n = 11 and G-2CIDR, n = 12). Estrus was synchronized with a P4 device (CIDR?; Pfizer-New Zealand, Auckland, New Zealand) for 14 d. However, in G-2CIDR, the CIDR was replaced by a new one on Day 7. Doses of 2.5 mg of dinoprost, i.m. (Lutalyse?, Pfizer-New Zealand) were administered on Days 0 and 14. All ewes received 300 IU of eCG (Novormon?, Syntex, Buenos Aires, Argentina) on Day 14. Estrus detection was accomplished using a teaser ram starting 12 h after CIDR removal and was repeated 3 times a day for 4 d. Ultrasonographic exam was used every 8 h for 5 d after the end of the treatment to determine the moment of ovulation and the diameter of the ovulatory follicle. Data were analyzed by ANOVA using SAS software (chi-square and Tukey tests). The proportions of treated ewes that were detected in estrus did not differ statistically between groups (G-1CIDR: 90.9% and G-2CIDR: 100%). The interval from onset estrus to CIDR removal differed (P < 0.05), between G-1CIDR (37.80 ± 8.02 h) and G-2CIDR (49.00 ± 9.16 h) groups. The frequency distributions of estrus in G-1CIDR ewes were 10, 70, 10, and 10% at 24, 36, 48, and 54 h, respectively, compared with 8.33, 8.33, 50, 8.33, and 25% at 30, 36, 48, 54, and 60 h after CIDR removal in the G-2CIDR ewes. All ewes ovulated at the end of the synchronization protocols. Ovulation occurred at 69.45 ± 10.00 h and 76.66 ± 15.04 h after the end of the protocols in G-1CIDR and G-2CIDR, respectively (P > 0.05). The ovulation frequency distribution for ovulation time in G-1CIDR was 27.27, 54.54, 9.09, and 9.09% at 60, 68, 84, and 92 h, whereas in G-2CIDR, 8.33, 50, 16.66, 8.33, 8.33, and 8.33% ovulated at 60, 68, 76, 92, 100, and 108 h after the end of treatment. The interval between estrus and ovulation was 29.40 ± 9.97 h in G-1CIDR compared with 27.66 ± 11.71 h in G-2CIDR (P > 0.05). The number of ovulations per animal and diameters of ovulatory follicles were 1.54 ± 0.82 and 6.95 ± 0.75 mm in G-1CIDR and 1.33 ± 0.77 and 7.00 ± 1.22 mm in G-2CIDR, respectively (P > 0.05). These results showed a later onset of estrus in G-2CIDR. However, the treatment with CIDR replacement did not promote an effect on ovulation rate and number of ovulatory follicles. Both protocols showed efficiency.
650 $aAnimal reproduction
650 $aControlled internal drug release devices
650 $aProgesterone
650 $aSheep
650 $aFertilidade
650 $aInseminação artificial
650 $aOvino
650 $aOvulação
650 $aProgesterona
650 $aRedução
650 $aReprodução animal
653 $aBrasil
653 $aCIDR
653 $aMinas Gerais
653 $aProtocolo
653 $aRaça Santa Inês
700 1 $aNASCIMENTO, P. M. P.
700 1 $aTERIXEIRA, P. P. M.
700 1 $aPIERONI, J. S. P.
700 1 $aLIMA, M. R.
700 1 $aBICUDO, S. D.
700 1 $aFONSECA, J. F. da
700 1 $aVICENTE, W. R. R.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Biblioteca |
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Tipo/Formato |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
17/09/2001 |
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Data da última atualização: |
01/09/2004 |
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Autoria: |
ARAUJO, J. V. de; GUIMARAES, M. P.; GARCIA, A. C. C. |
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Título: |
Imunizacao de Ratos com Larvas Infectantes de Strongyloides Ratti Irradiadas em Fonte de Cobalto-60. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.26, n.4, p.515-520, abr.1991 |
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Idioma: |
Português |
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Conteúdo: |
Foi realizado um estudo do comportamento de ratos imunizados com larvas de Strongyloides ratti irradiadas na dose de 50 Kr em fonte de Cobalto-60. Foram utilizadas duas cepas de S. ratti mantidas em ratos de laboratório (Rattus norvegicus albinus) e 48 ratos divididos em quatro grupos de doze ratos nos testes de cada cepa. Foram realizadas, a partir do sexto dia após a infecção inicial e de cinco em cinco dias, contagens de ovos por grama de fezes (OPG), titulação de imunoglobulinas da classe G anti-S. ratti pela técnica de ELISA, contagens diferenciais de leucócitos, e necrópsias periódicas. Observou-se melhor proteção nos animais imunizados e desafiados com larvas não irradiadas das duas cepas de S. ratti no 30o dia. Os títulos de imunoglobulinas da classe G anti-S. ratti foram detectados a partir do 10o dia e apresentaram picos entre o 15o e 25o dia em todos os grupos. Houve maior participação percentual de linfócitos nos grupos infectados, em relação ao grupo controle não infectado, a partir do 10o até o 45o dia. |
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Palavras-Chave: |
Animais domésticos; comportamento de ratos; imunoglobulinas; larvas irradiadas. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/20825/1/pab11_abr_91.pdf
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Marc: |
LEADER 01661naa a2200193 a 4500
001 1105783
005 2004-09-01
008 1991 bl uuuu u00u1 u #d
100 1 $aARAUJO, J. V. de
245 $aImunizacao de Ratos com Larvas Infectantes de Strongyloides Ratti Irradiadas em Fonte de Cobalto-60.
260 $c1991
520 $aFoi realizado um estudo do comportamento de ratos imunizados com larvas de Strongyloides ratti irradiadas na dose de 50 Kr em fonte de Cobalto-60. Foram utilizadas duas cepas de S. ratti mantidas em ratos de laboratório (Rattus norvegicus albinus) e 48 ratos divididos em quatro grupos de doze ratos nos testes de cada cepa. Foram realizadas, a partir do sexto dia após a infecção inicial e de cinco em cinco dias, contagens de ovos por grama de fezes (OPG), titulação de imunoglobulinas da classe G anti-S. ratti pela técnica de ELISA, contagens diferenciais de leucócitos, e necrópsias periódicas. Observou-se melhor proteção nos animais imunizados e desafiados com larvas não irradiadas das duas cepas de S. ratti no 30o dia. Os títulos de imunoglobulinas da classe G anti-S. ratti foram detectados a partir do 10o dia e apresentaram picos entre o 15o e 25o dia em todos os grupos. Houve maior participação percentual de linfócitos nos grupos infectados, em relação ao grupo controle não infectado, a partir do 10o até o 45o dia.
653 $aAnimais domésticos
653 $acomportamento de ratos
653 $aimunoglobulinas
653 $alarvas irradiadas
700 1 $aGUIMARAES, M. P.
700 1 $aGARCIA, A. C. C.
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.26, n.4, p.515-520, abr.1991
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Embrapa Unidades Centrais (AI-SEDE) |
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