Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s11250-019-02141-4 http://hdl.handle.net/11449/199695 |
Resumo: | Considering the high temperatures that the tropical climate provides to most of Brazil and the effects of thermal stress on reproductive processes, the objective of the present study was to analyze, in the warmer months of 2016, conception rates of Nelore bovine embryos in Acre state. For this purpose, oocytes were aspirated (ultrasound-guided follicular aspiration), matured, fertilized with Nelore bull semen, cultured for 6 days, and then the embryos were transferred to crossbred recipients. Pregnancy diagnosis was performed 30 and 60 days after embryo transfer. Meteorological data were obtained at www.inmet.gov.br to generate temperature-humidity index (THI). The data from the conception rates and periods of the year were submitted to the chi-square test at 5% probability to verify independence. Regression analysis was used to verify the relationship between THI and gestation rate. There was a strong relationship between conception rates and THI values, verified by an increase in conception rates as THI values were reduced and a decrease when THI reached the highest value. Our findings demonstrated a negative effect of heat stress in conception rates of crossbred cows in northern Brazil. |
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Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern BrazilBlastocystIVPOocytePregnancy rateTHIConsidering the high temperatures that the tropical climate provides to most of Brazil and the effects of thermal stress on reproductive processes, the objective of the present study was to analyze, in the warmer months of 2016, conception rates of Nelore bovine embryos in Acre state. For this purpose, oocytes were aspirated (ultrasound-guided follicular aspiration), matured, fertilized with Nelore bull semen, cultured for 6 days, and then the embryos were transferred to crossbred recipients. Pregnancy diagnosis was performed 30 and 60 days after embryo transfer. Meteorological data were obtained at www.inmet.gov.br to generate temperature-humidity index (THI). The data from the conception rates and periods of the year were submitted to the chi-square test at 5% probability to verify independence. Regression analysis was used to verify the relationship between THI and gestation rate. There was a strong relationship between conception rates and THI values, verified by an increase in conception rates as THI values were reduced and a decrease when THI reached the highest value. Our findings demonstrated a negative effect of heat stress in conception rates of crossbred cows in northern Brazil.Center for Biological and Nature Sciences Federal University of Acre, P.O. Box 69920900In Vitro Acre, P.O. Box 69901218Department of Animal Reproduction and Veterinary Radiology School of Veterinary Medicine and Animal Science Paulista State University – UNESP, P.O. Box 18618681Department of Animal Reproduction and Veterinary Radiology School of Veterinary Medicine and Animal Science Paulista State University – UNESP, P.O. Box 18618681Federal University of AcreIn Vitro AcreUniversidade Estadual Paulista (Unesp)Cordeiro, A. L.L.Satrapa, R. A.Gregianini, H. A.G.Gregianini, J. T.F.Maia, G. F.N.Landim-Alvarenga, F. C. [UNESP]2020-12-12T01:46:49Z2020-12-12T01:46:49Z2020-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1527-1532http://dx.doi.org/10.1007/s11250-019-02141-4Tropical Animal Health and Production, v. 52, n. 3, p. 1527-1532, 2020.1573-74380049-4747http://hdl.handle.net/11449/19969510.1007/s11250-019-02141-42-s2.0-8507535808584564903008148330000-0002-2420-2550Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengTropical Animal Health and Productioninfo:eu-repo/semantics/openAccess2024-09-09T14:01:20Zoai:repositorio.unesp.br:11449/199695Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462024-09-09T14:01:20Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil |
title |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil |
spellingShingle |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil Cordeiro, A. L.L. Blastocyst IVP Oocyte Pregnancy rate THI |
title_short |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil |
title_full |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil |
title_fullStr |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil |
title_full_unstemmed |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil |
title_sort |
Influence of temperature-humidity index on conception rate of Nelore embryos produced in vitro in northern Brazil |
author |
Cordeiro, A. L.L. |
author_facet |
Cordeiro, A. L.L. Satrapa, R. A. Gregianini, H. A.G. Gregianini, J. T.F. Maia, G. F.N. Landim-Alvarenga, F. C. [UNESP] |
author_role |
author |
author2 |
Satrapa, R. A. Gregianini, H. A.G. Gregianini, J. T.F. Maia, G. F.N. Landim-Alvarenga, F. C. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Federal University of Acre In Vitro Acre Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Cordeiro, A. L.L. Satrapa, R. A. Gregianini, H. A.G. Gregianini, J. T.F. Maia, G. F.N. Landim-Alvarenga, F. C. [UNESP] |
dc.subject.por.fl_str_mv |
Blastocyst IVP Oocyte Pregnancy rate THI |
topic |
Blastocyst IVP Oocyte Pregnancy rate THI |
description |
Considering the high temperatures that the tropical climate provides to most of Brazil and the effects of thermal stress on reproductive processes, the objective of the present study was to analyze, in the warmer months of 2016, conception rates of Nelore bovine embryos in Acre state. For this purpose, oocytes were aspirated (ultrasound-guided follicular aspiration), matured, fertilized with Nelore bull semen, cultured for 6 days, and then the embryos were transferred to crossbred recipients. Pregnancy diagnosis was performed 30 and 60 days after embryo transfer. Meteorological data were obtained at www.inmet.gov.br to generate temperature-humidity index (THI). The data from the conception rates and periods of the year were submitted to the chi-square test at 5% probability to verify independence. Regression analysis was used to verify the relationship between THI and gestation rate. There was a strong relationship between conception rates and THI values, verified by an increase in conception rates as THI values were reduced and a decrease when THI reached the highest value. Our findings demonstrated a negative effect of heat stress in conception rates of crossbred cows in northern Brazil. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:46:49Z 2020-12-12T01:46:49Z 2020-05-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s11250-019-02141-4 Tropical Animal Health and Production, v. 52, n. 3, p. 1527-1532, 2020. 1573-7438 0049-4747 http://hdl.handle.net/11449/199695 10.1007/s11250-019-02141-4 2-s2.0-85075358085 8456490300814833 0000-0002-2420-2550 |
url |
http://dx.doi.org/10.1007/s11250-019-02141-4 http://hdl.handle.net/11449/199695 |
identifier_str_mv |
Tropical Animal Health and Production, v. 52, n. 3, p. 1527-1532, 2020. 1573-7438 0049-4747 10.1007/s11250-019-02141-4 2-s2.0-85075358085 8456490300814833 0000-0002-2420-2550 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Tropical Animal Health and Production |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1527-1532 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
repositoriounesp@unesp.br |
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1810021327209234432 |