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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: |
06/05/2013 |
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Data da última atualização: |
17/01/2024 |
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Autoria: |
MENCHACA, A.; PINCZAC, A.; QUEIROLO, D. |
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Título: |
Storage of ram semen at 5 °C: effects of preservation period and timed artificial insemination on pregnancy rate in ewes. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Animal Reproduction, v. 2, n. 3, p. 195-198, jul./sept. 2005. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Artificial insemination (AI) using chilled ram semen has not been adopted in Uruguay yet, probably due to a lack of information about the use of this technology in the country. This study evaluated the fertility rate obtained in Merino ewes inseminated with ram semen stored at 5 °C in a TRIS-based extender in Uruguayan field conditions. The effect of storage period of semen (Experiment 1) and different times of artificial insemination (Experiment 2) were studied. In Experiment 1, fresh semen was diluted in a TRIS-based extender to a concentration of 200 x 106 spermatozoa/0.2 ml. Semen, maintained at low temperature, was used for cervical insemination at spontaneous estrus, soon after collection (n = 87), or 12 (n = 75) or 24 hours (n = 84) after collection. The cooling-rate curve was adjusted at 0.25 ºC/minute, and semen was cooled until it reached a temperature of 5 °C. In Experiment 2, semen was processed in a similar fashion to that of Experiment 1. Estrus was synchronized using a Short-Term Protocol using a progestagen treatment (6 days) with injection of a prostaglandin F2 alpha analogue at sponge insertion and equine chorionic gonadotropin (250 IU) at sponge removal. Insemination was performed 12 hours after estrus detection (n = 49) or at a fixed time (TAI) of 48 (n = 49), 54 (n = 47), or 48 and 54 hours (n = 47) after sponge withdrawal. Conception rate (pregnant ewes/inseminated ewes) and pregnancy rate (pregnant ewes/treated ewes) were evaluated 35-40 days after insemination using transrectal ultrasonography. In Experiment 1, conception rate was lower (34.5%; P < 0.05) for the 24-hour semen storage group or was similar (42.7%; P > 0.05) for the 12-hour storage group when compared to the control group (50.4%). In Experiment 2, a single TAI at 48 hours after sponge withdrawal resulted in a pregnancy rate similar to AI performed after detection of estrus (34.7% versus 34.7%, respectively). The TAI at 54 hours resulted in the lowest (10.6%; P < 0.05) pregnancy rate and the double TAI (48 and 54 hours) was intermediate (23.4%). Overall results showed that an acceptable conception rate was achieved when AI was performed after detection of estrus using semen stored at 5 °C for 12 hours in a TRIS-based extender. In addition, it is possible to avoid estrus detection by using a single TAI 48 hours after a Short-Term Protocol without affecting pregnancy rate. MenosAbstract: Artificial insemination (AI) using chilled ram semen has not been adopted in Uruguay yet, probably due to a lack of information about the use of this technology in the country. This study evaluated the fertility rate obtained in Merino ewes inseminated with ram semen stored at 5 °C in a TRIS-based extender in Uruguayan field conditions. The effect of storage period of semen (Experiment 1) and different times of artificial insemination (Experiment 2) were studied. In Experiment 1, fresh semen was diluted in a TRIS-based extender to a concentration of 200 x 106 spermatozoa/0.2 ml. Semen, maintained at low temperature, was used for cervical insemination at spontaneous estrus, soon after collection (n = 87), or 12 (n = 75) or 24 hours (n = 84) after collection. The cooling-rate curve was adjusted at 0.25 ºC/minute, and semen was cooled until it reached a temperature of 5 °C. In Experiment 2, semen was processed in a similar fashion to that of Experiment 1. Estrus was synchronized using a Short-Term Protocol using a progestagen treatment (6 days) with injection of a prostaglandin F2 alpha analogue at sponge insertion and equine chorionic gonadotropin (250 IU) at sponge removal. Insemination was performed 12 hours after estrus detection (n = 49) or at a fixed time (TAI) of 48 (n = 49), 54 (n = 47), or 48 and 54 hours (n = 47) after sponge withdrawal. Conception rate (pregnant ewes/inseminated ewes) and pregnancy rate (pregnant ewes/treated ewes) were evaluated 35-40 days... Mostrar Tudo |
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Palavras-Chave: |
Raça Merino; TRIS. |
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Thesagro: |
Conservação; Criopreservação; Ovelha; Ovino; Prenhez; Reprodução animal; Resfriamento; Sêmen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03153naa a2200265 a 4500
001 1957133
005 2024-01-17
008 2005 bl uuuu u00u1 u #d
100 1 $aMENCHACA, A.
245 $aStorage of ram semen at 5 °C$beffects of preservation period and timed artificial insemination on pregnancy rate in ewes.
260 $c2005
520 $aAbstract: Artificial insemination (AI) using chilled ram semen has not been adopted in Uruguay yet, probably due to a lack of information about the use of this technology in the country. This study evaluated the fertility rate obtained in Merino ewes inseminated with ram semen stored at 5 °C in a TRIS-based extender in Uruguayan field conditions. The effect of storage period of semen (Experiment 1) and different times of artificial insemination (Experiment 2) were studied. In Experiment 1, fresh semen was diluted in a TRIS-based extender to a concentration of 200 x 106 spermatozoa/0.2 ml. Semen, maintained at low temperature, was used for cervical insemination at spontaneous estrus, soon after collection (n = 87), or 12 (n = 75) or 24 hours (n = 84) after collection. The cooling-rate curve was adjusted at 0.25 ºC/minute, and semen was cooled until it reached a temperature of 5 °C. In Experiment 2, semen was processed in a similar fashion to that of Experiment 1. Estrus was synchronized using a Short-Term Protocol using a progestagen treatment (6 days) with injection of a prostaglandin F2 alpha analogue at sponge insertion and equine chorionic gonadotropin (250 IU) at sponge removal. Insemination was performed 12 hours after estrus detection (n = 49) or at a fixed time (TAI) of 48 (n = 49), 54 (n = 47), or 48 and 54 hours (n = 47) after sponge withdrawal. Conception rate (pregnant ewes/inseminated ewes) and pregnancy rate (pregnant ewes/treated ewes) were evaluated 35-40 days after insemination using transrectal ultrasonography. In Experiment 1, conception rate was lower (34.5%; P < 0.05) for the 24-hour semen storage group or was similar (42.7%; P > 0.05) for the 12-hour storage group when compared to the control group (50.4%). In Experiment 2, a single TAI at 48 hours after sponge withdrawal resulted in a pregnancy rate similar to AI performed after detection of estrus (34.7% versus 34.7%, respectively). The TAI at 54 hours resulted in the lowest (10.6%; P < 0.05) pregnancy rate and the double TAI (48 and 54 hours) was intermediate (23.4%). Overall results showed that an acceptable conception rate was achieved when AI was performed after detection of estrus using semen stored at 5 °C for 12 hours in a TRIS-based extender. In addition, it is possible to avoid estrus detection by using a single TAI 48 hours after a Short-Term Protocol without affecting pregnancy rate.
650 $aConservação
650 $aCriopreservação
650 $aOvelha
650 $aOvino
650 $aPrenhez
650 $aReprodução animal
650 $aResfriamento
650 $aSêmen
653 $aRaça Merino
653 $aTRIS
700 1 $aPINCZAC, A.
700 1 $aQUEIROLO, D.
773 $tAnimal Reproduction$gv. 2, n. 3, p. 195-198, jul./sept. 2005.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido; Embrapa Territorial. |
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Data corrente: |
30/03/2012 |
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Data da última atualização: |
04/04/2016 |
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Tipo da produção científica: |
Boletim de Pesquisa e Desenvolvimento |
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Autoria: |
ALVAREZ, I. A.; OLIVEIRA, A. R. de; PEREIRA, L. A. |
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Afiliação: |
IVAN ANDRE ALVAREZ, CNPM; ANDERSON RAMOS DE OLIVEIRA, CPATSA; LUCIO ALBERTO PEREIRA, CPATSA. |
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Título: |
Seleção de propriedades referência para compor modelos de restauração ecológica: aplicação de pesquisa quali-quantitativa. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Campinas: Embrapa Monitoramento por Satélite; Petrolina: Embrapa Semiárido, 2011. |
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Páginas: |
33 p. |
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Série: |
(Boletim de Pesquisa e Desenvolvimento, 22; 86) |
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ISSN: |
1806-3322; 1516-1641 |
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Idioma: |
Português |
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Conteúdo: |
O sucesso da recuperação de áreas degradadas em ambientes ribeirinhos depende da equilibrada relação entre o homem e a cobertura vegetal. A seleção das propriedades que necessitam de recuperação ecológica envolve esforços para identificar parceiros capacitados para atuar no sistema e assimilar uma política ambiental e de gestão. Com o objetivo de selecionar propriedades para potencial modelo de recuperação no Submédio São Francisco, desenvolveu-se estudo, por meio da pesquisa quali-quantitativa, com proprietários de terras próximas ao Rio São Francisco. Foram diagnosticadas mais de 100 propriedades em oito municípios da Rede Integrada de Desenvolvimento Econômico (RIDE) do Polo Petrolina (PE) e Juazeiro (BA), composta por quatro municípios no Estado de Pernambuco (Petrolina, Lagoa Grande, Santa Maria da Boa Vista e Orocó) e quatro municípios no Estado da Bahia (Juazeiro, Sobradinho, Casa Nova e Curaçá). Foi avaliada a potencialidade de os ribeirinhos participarem de projetos de recuperação das margens de suas propriedades. Foram utilizados questionários, reuniões, entrevistas e ferramentas do sistema de informação geográfica (SIG). Resultaram 6 áreas/propriedades que contemplam os segmentos agricultura familiar (subsistência), agricultura empresarial e agricultura comunitária (associativismo), com potencial para serem utilizadas como modelo (plano-piloto) de recuperação de áreas degradadas nas margens do Rio São Francisco. |
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Palavras-Chave: |
Código Florestal; Geoprocessamento; Recuperação de áreas degradadas; Rio São Francisco; Semiárido. |
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Thesagro: |
Cobertura Vegetal. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/57240/1/028-11.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/57020/1/Anderson-028-11.pdf
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Marc: |
LEADER 02329nam a2200241 a 4500
001 1921141
005 2016-04-04
008 2011 bl uuuu u0uu1 u #d
022 $a1806-3322; 1516-1641
100 1 $aALVAREZ, I. A.
245 $aSeleção de propriedades referência para compor modelos de restauração ecológica$baplicação de pesquisa quali-quantitativa.$h[electronic resource]
260 $aCampinas: Embrapa Monitoramento por Satélite; Petrolina: Embrapa Semiárido$c2011
300 $a33 p.
490 $a(Boletim de Pesquisa e Desenvolvimento, 22; 86)
520 $aO sucesso da recuperação de áreas degradadas em ambientes ribeirinhos depende da equilibrada relação entre o homem e a cobertura vegetal. A seleção das propriedades que necessitam de recuperação ecológica envolve esforços para identificar parceiros capacitados para atuar no sistema e assimilar uma política ambiental e de gestão. Com o objetivo de selecionar propriedades para potencial modelo de recuperação no Submédio São Francisco, desenvolveu-se estudo, por meio da pesquisa quali-quantitativa, com proprietários de terras próximas ao Rio São Francisco. Foram diagnosticadas mais de 100 propriedades em oito municípios da Rede Integrada de Desenvolvimento Econômico (RIDE) do Polo Petrolina (PE) e Juazeiro (BA), composta por quatro municípios no Estado de Pernambuco (Petrolina, Lagoa Grande, Santa Maria da Boa Vista e Orocó) e quatro municípios no Estado da Bahia (Juazeiro, Sobradinho, Casa Nova e Curaçá). Foi avaliada a potencialidade de os ribeirinhos participarem de projetos de recuperação das margens de suas propriedades. Foram utilizados questionários, reuniões, entrevistas e ferramentas do sistema de informação geográfica (SIG). Resultaram 6 áreas/propriedades que contemplam os segmentos agricultura familiar (subsistência), agricultura empresarial e agricultura comunitária (associativismo), com potencial para serem utilizadas como modelo (plano-piloto) de recuperação de áreas degradadas nas margens do Rio São Francisco.
650 $aCobertura Vegetal
653 $aCódigo Florestal
653 $aGeoprocessamento
653 $aRecuperação de áreas degradadas
653 $aRio São Francisco
653 $aSemiárido
700 1 $aOLIVEIRA, A. R. de
700 1 $aPEREIRA, L. A.
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Embrapa Territorial (CNPM) |
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