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Use of reduced doses of eCG applied by different routes in the TAI program in Santa Ines sheep

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Title: Use of reduced doses of eCG applied by different routes in the TAI program in Santa Ines sheep
Authors: Karla Dias Antunes-Melo, Veronaldo Souza de Oliveira, Anselmo Domingos Ferreira Santos, Claudio Alvarenga de Oliveira, Lícia Mendes Mendonça, Julianne Santiago Silva Goveia, Thiago Santos Almeida
Source: Semina: Ciências Agrárias, Vol 36, Iss 3, Pp 1347-1354 (2015)
Publisher Information: Universidade Estadual de Londrina, 2015.
Publication Year: 2015
Collection: LCC:Agriculture (General)
Subject Terms: Application route, Artificial insemination, Hormones, Sheep, Stress, Agriculture (General), S1-972
More Details: The aims of this study were to improve the cost-benefit ratio of the application of artificial insemination in fixed time (TAI) by the transcervical route in sheep, to test the dosage reduction and the use of the vulvar submucosa (VSM) route as an alternative for the application of equine chorionic gonadotropin (eCG) on the efficiency of the synchronization protocol and fertility to artificial insemination (AI) and to measure the level of cortisol in ewes as a result the application of this biotechnique. Blood samples were collected before AI, immediately after AI and seven days after AI. Six groups of twenty animals were used, and each group received doses of 200, 300 and 400 IU of eCG by the intramuscular route (IM) and VSM. Estrus was detected, and 48 hours later, the inseminations were performed by the transcervical route. Among the 120 treated ewes, 87.5% came in estrus. The percentage of the intrauterine deposition of semen was 88.3%. The pregnancy rate ranged from 20 to 70% between treatments, with an average of 46.66%. The VSM route was viable for the application of eCG in doses of 300 and 400 IU. The reduction in the eCG dose to 200 IU by the IM route reduces costs while maintaining the efficiency of estrus synchronization protocols and TAI with frozen semen in Santa Ines ewes. The average levels of cortisol were significant, at 1.15, 2.86 and 0.52 ?g/dL according to the three collections, being higher after the animal was off the easel at the end of AI. The procedures for performing the transcervical AI technique indicate that stress in the animals produces satisfactory fertility results and a low cost in multiparous ewes of the Santa Ines breed.
Document Type: article
File Description: electronic resource
Language: English
Portuguese
ISSN: 1679-0359
1676-546X
Relation: http://www.uel.br/revistas/uel/index.php/semagrarias/editor/submission/15299; https://doaj.org/toc/1676-546X; https://doaj.org/toc/1679-0359
DOI: 10.5433/1679-0359.2015v36n3p1347
Access URL: https://doaj.org/article/205f276bc9b64a3289887a923330e535
Accession Number: edsdoj.205f276bc9b64a3289887a923330e535
Database: Directory of Open Access Journals
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  Data: Use of reduced doses of eCG applied by different routes in the TAI program in Santa Ines sheep
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  Data: <searchLink fieldCode="AR" term="%22Karla+Dias+Antunes-Melo%22">Karla Dias Antunes-Melo</searchLink><br /><searchLink fieldCode="AR" term="%22Veronaldo+Souza+de+Oliveira%22">Veronaldo Souza de Oliveira</searchLink><br /><searchLink fieldCode="AR" term="%22Anselmo+Domingos+Ferreira+Santos%22">Anselmo Domingos Ferreira Santos</searchLink><br /><searchLink fieldCode="AR" term="%22Claudio+Alvarenga+de+Oliveira%22">Claudio Alvarenga de Oliveira</searchLink><br /><searchLink fieldCode="AR" term="%22Lícia+Mendes+Mendonça%22">Lícia Mendes Mendonça</searchLink><br /><searchLink fieldCode="AR" term="%22Julianne+Santiago+Silva+Goveia%22">Julianne Santiago Silva Goveia</searchLink><br /><searchLink fieldCode="AR" term="%22Thiago+Santos+Almeida%22">Thiago Santos Almeida</searchLink>
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  Data: Semina: Ciências Agrárias, Vol 36, Iss 3, Pp 1347-1354 (2015)
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  Data: Universidade Estadual de Londrina, 2015.
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  Data: The aims of this study were to improve the cost-benefit ratio of the application of artificial insemination in fixed time (TAI) by the transcervical route in sheep, to test the dosage reduction and the use of the vulvar submucosa (VSM) route as an alternative for the application of equine chorionic gonadotropin (eCG) on the efficiency of the synchronization protocol and fertility to artificial insemination (AI) and to measure the level of cortisol in ewes as a result the application of this biotechnique. Blood samples were collected before AI, immediately after AI and seven days after AI. Six groups of twenty animals were used, and each group received doses of 200, 300 and 400 IU of eCG by the intramuscular route (IM) and VSM. Estrus was detected, and 48 hours later, the inseminations were performed by the transcervical route. Among the 120 treated ewes, 87.5% came in estrus. The percentage of the intrauterine deposition of semen was 88.3%. The pregnancy rate ranged from 20 to 70% between treatments, with an average of 46.66%. The VSM route was viable for the application of eCG in doses of 300 and 400 IU. The reduction in the eCG dose to 200 IU by the IM route reduces costs while maintaining the efficiency of estrus synchronization protocols and TAI with frozen semen in Santa Ines ewes. The average levels of cortisol were significant, at 1.15, 2.86 and 0.52 ?g/dL according to the three collections, being higher after the animal was off the easel at the end of AI. The procedures for performing the transcervical AI technique indicate that stress in the animals produces satisfactory fertility results and a low cost in multiparous ewes of the Santa Ines breed.
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      – Text: English
      – Text: Portuguese
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        PageCount: 8
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      – SubjectFull: Application route
        Type: general
      – SubjectFull: Artificial insemination
        Type: general
      – SubjectFull: Hormones
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      – SubjectFull: Sheep
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      – TitleFull: Use of reduced doses of eCG applied by different routes in the TAI program in Santa Ines sheep
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