Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte
Ano de defesa: | 2010 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade do Oeste Paulista
|
Programa de Pós-Graduação: |
Mestrado em Ciência Animal
|
Departamento: |
Ciências Agrárias
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://bdtd.unoeste.br:8080/tede/handle/tede/235 |
Resumo: | The technique of timed artificial insemination (TAI) can be used as a tool to optimize reproductive efficiency. Among the alternative protocols hormone, prostaglandin (PGF2α) and estradiol benzoate (EB) have been used frequently, or combined with progesterone and GnRH analogues. This work aimed to evaluate the influence of follicular diameter on the pregnancy rate using BE or GnRH on the placement of the implant of progesterone (D0) in beef cows divided into two groups: G-BE (n = 32) and G-GnRH (n = 29). The D0 was placed implant P4 (CIDR ®) and applied 2 ml of BE (G-BE) or 2.5 mL of GnRH (GnRH-G). In D9 the implant was removed, concomitant administration of 2.5 mL of 0.25 mL PGF2α and estradiol cypionate (ECP ®) followed by removal of calves. After 48 h all the cows were inseminated and the calves returned. At D0 and D9 was held ultrasound to measure the dominant follicle (DF) present in the ovary. There was no difference (p> 0.05) in pregnancy rate between treatments, BE (55%) and GnRH (41%), but the follicular diameter was significantly higher (p <0.05) in pregnant cows treated with EB (10.7 mm vs. 8.5 mm) and in cows treated with GnRH there was no difference (p> 0.05) between pregnant and empty (11.6 mm vs. 10.2 mm). We also evaluate the postpartum period (> or <45 days), the application of eCG or temporary removal of the calves (RTB) and the influence of genetic group on TAI. We used the 678 cows being: Nelore (n = 234), Nelore, Brahman (n = 159) and ¾ Nellore-Red Angus (n = 285) divided into G-Early (GP, n = 151) and G-Late (GT, n = 527). Again divided into GP-RTB (n = 93) and GT-RTB (n = 299), GP-eCG (n = 58) and GT-eCG (n = 228). The animals received CIDR ® + 2 mL of BE (D0). In D8, the device was removed and all groups received 2.5 mL PGF2α , and 1.5 mL eCG (GP-GT-eCG and eCG) or removal of calves (GP-GT-RTB and RTB). In D9 the animals received 1 mL BE and 24 hours after held IATF. The pregnancy rate did not change (p> 0.05), and 40% (GP) and 48% (GT). Also did not change (p> 0.05) in groups: GP-eCG (37.9%), GP-RTB (41.9%), GT-eCG (51.7%) and GT-RTB (45.1 %). The pregnancy rate in Nelore cows - Brahman (37%) was lower (p <0.05) than the Nellore (52%) and ¾ Nellore Red - Angus (45%). It was concluded that the use of GnRH in D0 does not improve pregnancy rate in cows in the postpartum period, even increasing follicular diameter, which females with less than 45 days postpartum are able to IATF, regardless of the use of eCG or RTB and race influence of mothers on pregnancy rate. |
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Castilho, CaliêCPF:13689203813http://lattes.cnpq.br/4860674666647521Giometti, Ines CristinaCPF:21870245806http://lattes.cnpq.br/5461216137094368Nogueira, Marcelo Fabio GouveiaCPF:07271078878http://lattes.cnpq.br/3734933152414412CPF:31852731842http://lattes.cnpq.br/9438215652033883Silveira, Ana Paula da2016-01-26T18:55:29Z2010-10-042010-03-03SILVEIRA, Ana Paula da. Use of TAI protocols to enhance reproductive efficiency of beef cattle. 2010. 59 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade do Oeste Paulista, Presidente Prudente, 2010.http://bdtd.unoeste.br:8080/tede/handle/tede/235The technique of timed artificial insemination (TAI) can be used as a tool to optimize reproductive efficiency. Among the alternative protocols hormone, prostaglandin (PGF2α) and estradiol benzoate (EB) have been used frequently, or combined with progesterone and GnRH analogues. This work aimed to evaluate the influence of follicular diameter on the pregnancy rate using BE or GnRH on the placement of the implant of progesterone (D0) in beef cows divided into two groups: G-BE (n = 32) and G-GnRH (n = 29). The D0 was placed implant P4 (CIDR ®) and applied 2 ml of BE (G-BE) or 2.5 mL of GnRH (GnRH-G). In D9 the implant was removed, concomitant administration of 2.5 mL of 0.25 mL PGF2α and estradiol cypionate (ECP ®) followed by removal of calves. After 48 h all the cows were inseminated and the calves returned. At D0 and D9 was held ultrasound to measure the dominant follicle (DF) present in the ovary. There was no difference (p> 0.05) in pregnancy rate between treatments, BE (55%) and GnRH (41%), but the follicular diameter was significantly higher (p <0.05) in pregnant cows treated with EB (10.7 mm vs. 8.5 mm) and in cows treated with GnRH there was no difference (p> 0.05) between pregnant and empty (11.6 mm vs. 10.2 mm). We also evaluate the postpartum period (> or <45 days), the application of eCG or temporary removal of the calves (RTB) and the influence of genetic group on TAI. We used the 678 cows being: Nelore (n = 234), Nelore, Brahman (n = 159) and ¾ Nellore-Red Angus (n = 285) divided into G-Early (GP, n = 151) and G-Late (GT, n = 527). Again divided into GP-RTB (n = 93) and GT-RTB (n = 299), GP-eCG (n = 58) and GT-eCG (n = 228). The animals received CIDR ® + 2 mL of BE (D0). In D8, the device was removed and all groups received 2.5 mL PGF2α , and 1.5 mL eCG (GP-GT-eCG and eCG) or removal of calves (GP-GT-RTB and RTB). In D9 the animals received 1 mL BE and 24 hours after held IATF. The pregnancy rate did not change (p> 0.05), and 40% (GP) and 48% (GT). Also did not change (p> 0.05) in groups: GP-eCG (37.9%), GP-RTB (41.9%), GT-eCG (51.7%) and GT-RTB (45.1 %). The pregnancy rate in Nelore cows - Brahman (37%) was lower (p <0.05) than the Nellore (52%) and ¾ Nellore Red - Angus (45%). It was concluded that the use of GnRH in D0 does not improve pregnancy rate in cows in the postpartum period, even increasing follicular diameter, which females with less than 45 days postpartum are able to IATF, regardless of the use of eCG or RTB and race influence of mothers on pregnancy rate.A técnica da inseminação artificial em tempo fixo (IATF) pode ser utilizada como ferramenta para otimização da eficiência reprodutiva. Entre as alternativas de protocolos hormonais, a prostaglandina F2α (PGF2α), seus análogos e o benzoato de estradiol (BE) têm sido utilizados com freqüência, combinados à progesterona (P4) ou análogos e GnRH ou análogos. Neste trabalho objetivou-se avaliar a influência do diâmetro folicular sobre a taxa de prenhez, utilizando BE ou GnRH no dia da colocação do implante de progesterona (D0) em vacas de corte divididas em dois grupos: G-BE (n=32) e G-GnRH (n=29). No D0 foi colocado um dispositivo intravaginal de P4 (CIDR®) e aplicado 2mL de BE (G-BE) ou 2,5 mL de GnRH (G-GnRH). No D9 foi retirado o implante, concomitante à administração de 2,5 mL de PGF2α e 0,25 mL de cipionato de estradiol (E.C.P.®) seguido de remoção dos bezerros. Após 48h todas as vacas foram inseminadas e os bezerros retornados. No D0 e D9 foi realizada ultrassonografia para medir o folículo dominante (FD) presente no ovário. Não houve diferença (p>0,05) na taxa de prenhez entre os tratamentos, BE (55%) e GnRH (41%). O diâmetro folicular foi significativamente maior (p<0,05) nas vacas prenhes tratadas com BE (10,7mm vs 8,5mm) e nas vacas tratadas com GnRH não houve diferença (p>0,05) entre as prenhes e vazias (11,6mm vs 10,2mm). Em outro experimento, avaliou-se o período pós-parto (> ou <45 dias), a aplicação de eCG ou remoção temporária dos bezerros (RTB) e influência do grupo genético na IATF. Utilizou-se 678 vacas sendo: Nelore (n=234), ½ Nelore-Brahman (n=159) e ¾ Nelore-Red Angus (n=285) divididas em G-Precoce (G-P, n=151) e G-Tardio (G-T, n=527). Novamente divididas em G-P-RTB (n=93) e G-T-RTB (n=299); G-P-eCG (n=58) e G-T-eCG (n=228). Os animais receberam CIDR® + 2 mL de BE (D0). No D8, o dispositivo foi retirado e todos os grupos receberam 2,5 mL PGF2α, e 1,5 mL eCG (G-P-eCG e G-T-eCG) ou remoção dos bezerros (G-P-RTB e G-T-RTB). No D9 os animais receberam 1 mL BE e 24h após realizou-se IATF. A taxa de prenhez não variou (p>0,05), sendo 40% (G-P) e 48% (G-T). Também não variou (p>0,05) nos grupos: G-P-eCG (37,9%), G-P-RTB (41,9%), G-T-eCG (51,7%) e G-T-RTB (45,1%). A taxa de prenhez nas vacas ½ Nelore Brahman (37%) foi inferior (p<0,05) que os da raça Nelore (52%) e ¾ Nelore Red Angus (45%). Foi concluído que o uso de GnRH no D0 não melhorou a taxa de prenhez em vacas no pós-parto, mesmo aumentando o diâmetro folicular, que fêmeas com menos de 45 dias pós-parto estão aptas para IATF, independente do uso de eCG ou RTB e a raça das matrizes influencia nas taxas de prenhez, sendo a raça Nelore a que apresentou a maior taxa.Made available in DSpace on 2016-01-26T18:55:29Z (GMT). No. of bitstreams: 1 Dissertacao.pdf: 349806 bytes, checksum: 1fd0f5db382ba931252ba16e3de9a860 (MD5) Previous issue date: 2010-03-03application/pdfhttp://bdtd.unoeste.br:8080/tede/retrieve/615/Dissertacao.pdf.jpgporUniversidade do Oeste PaulistaMestrado em Ciência AnimalUNOESTEBRCiências AgráriasVacas de corte - Pós-partoBenzoato de estradiolGnRHeCGTaxa de prenhezPostpartumEstradiol benzoateGnRHeCGPregnancy rateCNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIAUso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corteUse of TAI protocols to enhance reproductive efficiency of beef cattleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis1886725639743614135500info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UNOESTEinstname:Universidade do Oeste Paulista (UNOESTE)instacron:UNOESTEORIGINALDissertacao.pdfapplication/pdf349806http://bdtd.unoeste.br:8080/tede/bitstream/tede/235/1/Dissertacao.pdf1fd0f5db382ba931252ba16e3de9a860MD51THUMBNAILDissertacao.pdf.jpgDissertacao.pdf.jpgimage/jpeg3610http://bdtd.unoeste.br:8080/tede/bitstream/tede/235/2/Dissertacao.pdf.jpgf412c4ff96198cc8d92fb421088267bfMD52tede/2352016-01-27 01:01:41.412oai:bdtd.unoeste.br:tede/235Biblioteca Digital de Teses e Dissertaçõeshttp://bdtd.unoeste.br:8080/jspui/PUBhttp://bdtd.unoeste.br:8080/oai/requestbdtd@unoeste.bropendoar:2016-01-27T03:01:41Biblioteca Digital de Teses e Dissertações da UNOESTE - Universidade do Oeste Paulista (UNOESTE)false |
dc.title.por.fl_str_mv |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte |
dc.title.alternative.eng.fl_str_mv |
Use of TAI protocols to enhance reproductive efficiency of beef cattle |
title |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte |
spellingShingle |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte Silveira, Ana Paula da Vacas de corte - Pós-parto Benzoato de estradiol GnRH eCG Taxa de prenhez Postpartum Estradiol benzoate GnRH eCG Pregnancy rate CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
title_short |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte |
title_full |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte |
title_fullStr |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte |
title_full_unstemmed |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte |
title_sort |
Uso de protocolos de IATF para aumentar a eficiência reprodutiva de gado de corte |
author |
Silveira, Ana Paula da |
author_facet |
Silveira, Ana Paula da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Castilho, Caliê |
dc.contributor.advisor1ID.fl_str_mv |
CPF:13689203813 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4860674666647521 |
dc.contributor.referee1.fl_str_mv |
Giometti, Ines Cristina |
dc.contributor.referee1ID.fl_str_mv |
CPF:21870245806 |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/5461216137094368 |
dc.contributor.referee2.fl_str_mv |
Nogueira, Marcelo Fabio Gouveia |
dc.contributor.referee2ID.fl_str_mv |
CPF:07271078878 |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/3734933152414412 |
dc.contributor.authorID.fl_str_mv |
CPF:31852731842 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/9438215652033883 |
dc.contributor.author.fl_str_mv |
Silveira, Ana Paula da |
contributor_str_mv |
Castilho, Caliê Giometti, Ines Cristina Nogueira, Marcelo Fabio Gouveia |
dc.subject.por.fl_str_mv |
Vacas de corte - Pós-parto Benzoato de estradiol GnRH eCG Taxa de prenhez |
topic |
Vacas de corte - Pós-parto Benzoato de estradiol GnRH eCG Taxa de prenhez Postpartum Estradiol benzoate GnRH eCG Pregnancy rate CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
dc.subject.eng.fl_str_mv |
Postpartum Estradiol benzoate GnRH eCG Pregnancy rate |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
description |
The technique of timed artificial insemination (TAI) can be used as a tool to optimize reproductive efficiency. Among the alternative protocols hormone, prostaglandin (PGF2α) and estradiol benzoate (EB) have been used frequently, or combined with progesterone and GnRH analogues. This work aimed to evaluate the influence of follicular diameter on the pregnancy rate using BE or GnRH on the placement of the implant of progesterone (D0) in beef cows divided into two groups: G-BE (n = 32) and G-GnRH (n = 29). The D0 was placed implant P4 (CIDR ®) and applied 2 ml of BE (G-BE) or 2.5 mL of GnRH (GnRH-G). In D9 the implant was removed, concomitant administration of 2.5 mL of 0.25 mL PGF2α and estradiol cypionate (ECP ®) followed by removal of calves. After 48 h all the cows were inseminated and the calves returned. At D0 and D9 was held ultrasound to measure the dominant follicle (DF) present in the ovary. There was no difference (p> 0.05) in pregnancy rate between treatments, BE (55%) and GnRH (41%), but the follicular diameter was significantly higher (p <0.05) in pregnant cows treated with EB (10.7 mm vs. 8.5 mm) and in cows treated with GnRH there was no difference (p> 0.05) between pregnant and empty (11.6 mm vs. 10.2 mm). We also evaluate the postpartum period (> or <45 days), the application of eCG or temporary removal of the calves (RTB) and the influence of genetic group on TAI. We used the 678 cows being: Nelore (n = 234), Nelore, Brahman (n = 159) and ¾ Nellore-Red Angus (n = 285) divided into G-Early (GP, n = 151) and G-Late (GT, n = 527). Again divided into GP-RTB (n = 93) and GT-RTB (n = 299), GP-eCG (n = 58) and GT-eCG (n = 228). The animals received CIDR ® + 2 mL of BE (D0). In D8, the device was removed and all groups received 2.5 mL PGF2α , and 1.5 mL eCG (GP-GT-eCG and eCG) or removal of calves (GP-GT-RTB and RTB). In D9 the animals received 1 mL BE and 24 hours after held IATF. The pregnancy rate did not change (p> 0.05), and 40% (GP) and 48% (GT). Also did not change (p> 0.05) in groups: GP-eCG (37.9%), GP-RTB (41.9%), GT-eCG (51.7%) and GT-RTB (45.1 %). The pregnancy rate in Nelore cows - Brahman (37%) was lower (p <0.05) than the Nellore (52%) and ¾ Nellore Red - Angus (45%). It was concluded that the use of GnRH in D0 does not improve pregnancy rate in cows in the postpartum period, even increasing follicular diameter, which females with less than 45 days postpartum are able to IATF, regardless of the use of eCG or RTB and race influence of mothers on pregnancy rate. |
publishDate |
2010 |
dc.date.available.fl_str_mv |
2010-10-04 |
dc.date.issued.fl_str_mv |
2010-03-03 |
dc.date.accessioned.fl_str_mv |
2016-01-26T18:55:29Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SILVEIRA, Ana Paula da. Use of TAI protocols to enhance reproductive efficiency of beef cattle. 2010. 59 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade do Oeste Paulista, Presidente Prudente, 2010. |
dc.identifier.uri.fl_str_mv |
http://bdtd.unoeste.br:8080/tede/handle/tede/235 |
identifier_str_mv |
SILVEIRA, Ana Paula da. Use of TAI protocols to enhance reproductive efficiency of beef cattle. 2010. 59 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade do Oeste Paulista, Presidente Prudente, 2010. |
url |
http://bdtd.unoeste.br:8080/tede/handle/tede/235 |
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por |
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1886725639743614135 |
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500 |
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Universidade do Oeste Paulista |
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Mestrado em Ciência Animal |
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UNOESTE |
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BR |
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Ciências Agrárias |
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Universidade do Oeste Paulista |
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