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| 1. |  | TEIXEIRA, R. A. C.; LIMA, M. D. R.; SILVA, A. R.; GONÇALVES, D. de A.; MOREIRA, L. J. da S.; MIRANDA, R. O. V. de; DIAS JUNIOR, A. F.; TOMAZELLO-FILHO, M.; SOARES, A. A. V.; PROTÁSIO, T. de P. Dynamics of experimental plantations of Tachigali vulgaris in response to fertilization and soil texture. New Forests, 2023. Online first.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 1 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
27/07/2012 |
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Data da última atualização: |
26/05/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
CAVALCANTI, A. dos S.; BRANDÃO, F. Z.; NOGUEIRA, L. A. G.; FONSECA, J. F. da. |
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Afiliação: |
Amanda dos Santos Cavalcanti, Pós-graduação, Universidade Federal Fluminense, Niterói, RJ, Brasil.; Felipe Zandonadi Brandão, UFF, Niterói, RJ.; Luiz Altamiro Garcia Nogueira, UFF, Niterói, RJ.; JEFERSON FERREIRA DA FONSECA, CNPC. |
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Título: |
Effects of GnRH administration on ovulation and fertility in ewes subjected to estrous synchronization. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, Viçosa, MG, v. 41, n. 6, p. 1412-1418, Jun. 2012. |
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DOI: |
http://dx.doi.org/10.1590/S1516-35982012000600014 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The objective of this study was to verify the effects of GnRH on ovulation and pregnancy of ewes subjected to a short-term synchronization of estrus. Santa Inês and crossbred Santa Inês/Dorper ewes received 60 mg MAP sponges during 6 days plus 300 IU eCG and 30 µg d-cloprostenol 24 h prior to sponge withdrawal (SW). Ewes were assigned to receive 0.9% NaCl solution (Tcontrol; n = 32) or 25 µg GnRH (licerelin, TGnRH; n = 34) 24 hours after SW. Each group was assigned to intrauterine insemination by laparoscopy (n = 25) or to natural mating (n = 41). Artificial insemination was performed with a single dose of fresh semen. For controlled mating, females were exposed to males 12, 24, 36 and 48 hours after SW. Ten females per treatment were subjected to transrectal ultrasound examination at 12-hour intervals (SW to 60 hours after). Estrous response (100.0% vs 95.2%), interval from SW to estrus (32.9±7.4 vs 29.8±6.9 hours), estrous length (37.4±9.0 vs 31.5±10.4 hours), pregnancy rates (57.0% vs 41.0%), ovulation rate (100.0% vs 90.0%), number of ovulations/ewe (1.1±0.3 vs 1.2±0.4), maximum follicular diameter (6.4±0.7 vs 6.1±0.6 mm), interval from SW to ovulation (59.1±3.5 vs 58.4±3.5 hours) did not differ between Tcontrol and TGnRH, respectively. Administration of GnRH 24 hours after SW does not improve ovulation or pregnancy rate in estrous synchronization in ewes. |
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Palavras-Chave: |
Intravaginal progesterone insert; Oestrus synchronization; Raça Santa Inês; Taxa de prenhez. |
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Thesagro: |
Ciclo estral; Inseminação artificial; Ovino; Ovulação; Progesterona; Reprodução animal; Sincronização do cio. |
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Thesaurus NAL: |
Artificial insemination; Ovulation; pregnancy rate; Progesterone; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/62486/1/API-Effects-of-GnRH.pdf
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Marc: |
LEADER 02545naa a2200361 a 4500
001 1929671
005 2015-05-26
008 2012 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/S1516-35982012000600014$2DOI
100 1 $aCAVALCANTI, A. dos S.
245 $aEffects of GnRH administration on ovulation and fertility in ewes subjected to estrous synchronization.$h[electronic resource]
260 $c2012
520 $aAbstract: The objective of this study was to verify the effects of GnRH on ovulation and pregnancy of ewes subjected to a short-term synchronization of estrus. Santa Inês and crossbred Santa Inês/Dorper ewes received 60 mg MAP sponges during 6 days plus 300 IU eCG and 30 µg d-cloprostenol 24 h prior to sponge withdrawal (SW). Ewes were assigned to receive 0.9% NaCl solution (Tcontrol; n = 32) or 25 µg GnRH (licerelin, TGnRH; n = 34) 24 hours after SW. Each group was assigned to intrauterine insemination by laparoscopy (n = 25) or to natural mating (n = 41). Artificial insemination was performed with a single dose of fresh semen. For controlled mating, females were exposed to males 12, 24, 36 and 48 hours after SW. Ten females per treatment were subjected to transrectal ultrasound examination at 12-hour intervals (SW to 60 hours after). Estrous response (100.0% vs 95.2%), interval from SW to estrus (32.9±7.4 vs 29.8±6.9 hours), estrous length (37.4±9.0 vs 31.5±10.4 hours), pregnancy rates (57.0% vs 41.0%), ovulation rate (100.0% vs 90.0%), number of ovulations/ewe (1.1±0.3 vs 1.2±0.4), maximum follicular diameter (6.4±0.7 vs 6.1±0.6 mm), interval from SW to ovulation (59.1±3.5 vs 58.4±3.5 hours) did not differ between Tcontrol and TGnRH, respectively. Administration of GnRH 24 hours after SW does not improve ovulation or pregnancy rate in estrous synchronization in ewes.
650 $aArtificial insemination
650 $aOvulation
650 $apregnancy rate
650 $aProgesterone
650 $aSheep
650 $aCiclo estral
650 $aInseminação artificial
650 $aOvino
650 $aOvulação
650 $aProgesterona
650 $aReprodução animal
650 $aSincronização do cio
653 $aIntravaginal progesterone insert
653 $aOestrus synchronization
653 $aRaça Santa Inês
653 $aTaxa de prenhez
700 1 $aBRANDÃO, F. Z.
700 1 $aNOGUEIRA, L. A. G.
700 1 $aFONSECA, J. F. da
773 $tRevista Brasileira de Zootecnia, Viçosa, MG$gv. 41, n. 6, p. 1412-1418, Jun. 2012.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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