Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.anireprosci.2022.107090 http://hdl.handle.net/11449/246255 |
Resumo: | The aim of this study was to investigate whether parameters obtained by computer-assisted sperm analysis (CASA), infrared thermography (IRT), and testicular B-mode and Doppler ultrasound can be used as indicators of fertility in natural service Nellore bulls. Twenty-nine Nellore bulls were evaluated on days 66 (-D66), 38 (-D38), and 10 (-D10) before the beginning of natural service mating. In all assessments, semen samples were collected and sperm kinetics were evaluated by CASA, thermographic imaging of the scrotal and ocular region, testicular B-mode ultrasound, and Doppler ultrasound of the spermatic cord. At the end of natural service, the bulls were classified based on the pregnancy rate of individual batches into low fertility (pregnancy rate 66.57 ± 0.62 %), medium fertility (76.47 ± 0.51 %), and high fertility (84.80 ± 0.60 %) groups. No difference in the IRT parameters was observed between groups. High fertility animals exhibited higher average path velocity (VAP = 110.98 µm/s), straight line velocity (VSL = 87.05 µm/s), curvilinear velocity (VCL = 190.78 µm/s), pulsatility index (PI = 0.93), and resistive index (RI = 0.57) than low fertility animals (VAP = 100.02 µm/s; VSL = 79.84 µm/s; VCL = 173.22 µm/s; PI = 0.69; RI = 0.48). Positive correlations were observed between pregnancy rate and VSL (0.21), PI (0.28) and RI (0.32). In conclusion, IRT does not provide fertility indicators in Nellore bulls. The VAP, VSL and VCL obtained by CASA and PI and RI obtained by Doppler ultrasound can be used as indicators of fertility in Nellore bulls. |
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Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bullsCASAFertilityInfrared thermographySemenUltrasoundThe aim of this study was to investigate whether parameters obtained by computer-assisted sperm analysis (CASA), infrared thermography (IRT), and testicular B-mode and Doppler ultrasound can be used as indicators of fertility in natural service Nellore bulls. Twenty-nine Nellore bulls were evaluated on days 66 (-D66), 38 (-D38), and 10 (-D10) before the beginning of natural service mating. In all assessments, semen samples were collected and sperm kinetics were evaluated by CASA, thermographic imaging of the scrotal and ocular region, testicular B-mode ultrasound, and Doppler ultrasound of the spermatic cord. At the end of natural service, the bulls were classified based on the pregnancy rate of individual batches into low fertility (pregnancy rate 66.57 ± 0.62 %), medium fertility (76.47 ± 0.51 %), and high fertility (84.80 ± 0.60 %) groups. No difference in the IRT parameters was observed between groups. High fertility animals exhibited higher average path velocity (VAP = 110.98 µm/s), straight line velocity (VSL = 87.05 µm/s), curvilinear velocity (VCL = 190.78 µm/s), pulsatility index (PI = 0.93), and resistive index (RI = 0.57) than low fertility animals (VAP = 100.02 µm/s; VSL = 79.84 µm/s; VCL = 173.22 µm/s; PI = 0.69; RI = 0.48). Positive correlations were observed between pregnancy rate and VSL (0.21), PI (0.28) and RI (0.32). In conclusion, IRT does not provide fertility indicators in Nellore bulls. The VAP, VSL and VCL obtained by CASA and PI and RI obtained by Doppler ultrasound can be used as indicators of fertility in Nellore bulls.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual do Estado de São Paulo (UNESP) Faculdade de Ciências Agrárias e Veterinária (FCAV), SPUniversidade Federal de Juiz de Fora (UFJF), MGUniversidade Santo Amaro (UNISA), SPInstituto de Zootecnia (IZ) Centro de Pesquisa e Desenvolvimento de Bovinos de Corte, SPUniversidade Estadual do Estado de São Paulo (UNESP) Faculdade de Ciências Agrárias e Veterinária (FCAV), SPCAPES: 001FAPESP: 2017/50339-5Universidade Estadual Paulista (UNESP)Universidade Federal de Juiz de Fora (UFJF)Universidade Santo Amaro (UNISA)Centro de Pesquisa e Desenvolvimento de Bovinos de CorteFernandes, Luana Gomes [UNESP]Borges, Marcelo Sant'Ana [UNESP]de Oliveira Silva, Marina [UNESP]Rodrigues, Naiara Nantes [UNESP]Vicentini, Rogério RibeiroCrespilho, André MacielMercadante, Maria Eugênia ZerlottiMonteiro, Fabio Morato [UNESP]2023-07-29T12:35:55Z2023-07-29T12:35:55Z2022-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.anireprosci.2022.107090Animal Reproduction Science, v. 247.0378-4320http://hdl.handle.net/11449/24625510.1016/j.anireprosci.2022.1070902-s2.0-85141512700Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnimal Reproduction Scienceinfo:eu-repo/semantics/openAccess2023-07-29T12:35:55Zoai:repositorio.unesp.br:11449/246255Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-07-29T12:35:55Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls |
title |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls |
spellingShingle |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls Fernandes, Luana Gomes [UNESP] CASA Fertility Infrared thermography Semen Ultrasound |
title_short |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls |
title_full |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls |
title_fullStr |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls |
title_full_unstemmed |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls |
title_sort |
Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls |
author |
Fernandes, Luana Gomes [UNESP] |
author_facet |
Fernandes, Luana Gomes [UNESP] Borges, Marcelo Sant'Ana [UNESP] de Oliveira Silva, Marina [UNESP] Rodrigues, Naiara Nantes [UNESP] Vicentini, Rogério Ribeiro Crespilho, André Maciel Mercadante, Maria Eugênia Zerlotti Monteiro, Fabio Morato [UNESP] |
author_role |
author |
author2 |
Borges, Marcelo Sant'Ana [UNESP] de Oliveira Silva, Marina [UNESP] Rodrigues, Naiara Nantes [UNESP] Vicentini, Rogério Ribeiro Crespilho, André Maciel Mercadante, Maria Eugênia Zerlotti Monteiro, Fabio Morato [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Federal de Juiz de Fora (UFJF) Universidade Santo Amaro (UNISA) Centro de Pesquisa e Desenvolvimento de Bovinos de Corte |
dc.contributor.author.fl_str_mv |
Fernandes, Luana Gomes [UNESP] Borges, Marcelo Sant'Ana [UNESP] de Oliveira Silva, Marina [UNESP] Rodrigues, Naiara Nantes [UNESP] Vicentini, Rogério Ribeiro Crespilho, André Maciel Mercadante, Maria Eugênia Zerlotti Monteiro, Fabio Morato [UNESP] |
dc.subject.por.fl_str_mv |
CASA Fertility Infrared thermography Semen Ultrasound |
topic |
CASA Fertility Infrared thermography Semen Ultrasound |
description |
The aim of this study was to investigate whether parameters obtained by computer-assisted sperm analysis (CASA), infrared thermography (IRT), and testicular B-mode and Doppler ultrasound can be used as indicators of fertility in natural service Nellore bulls. Twenty-nine Nellore bulls were evaluated on days 66 (-D66), 38 (-D38), and 10 (-D10) before the beginning of natural service mating. In all assessments, semen samples were collected and sperm kinetics were evaluated by CASA, thermographic imaging of the scrotal and ocular region, testicular B-mode ultrasound, and Doppler ultrasound of the spermatic cord. At the end of natural service, the bulls were classified based on the pregnancy rate of individual batches into low fertility (pregnancy rate 66.57 ± 0.62 %), medium fertility (76.47 ± 0.51 %), and high fertility (84.80 ± 0.60 %) groups. No difference in the IRT parameters was observed between groups. High fertility animals exhibited higher average path velocity (VAP = 110.98 µm/s), straight line velocity (VSL = 87.05 µm/s), curvilinear velocity (VCL = 190.78 µm/s), pulsatility index (PI = 0.93), and resistive index (RI = 0.57) than low fertility animals (VAP = 100.02 µm/s; VSL = 79.84 µm/s; VCL = 173.22 µm/s; PI = 0.69; RI = 0.48). Positive correlations were observed between pregnancy rate and VSL (0.21), PI (0.28) and RI (0.32). In conclusion, IRT does not provide fertility indicators in Nellore bulls. The VAP, VSL and VCL obtained by CASA and PI and RI obtained by Doppler ultrasound can be used as indicators of fertility in Nellore bulls. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-12-01 2023-07-29T12:35:55Z 2023-07-29T12:35:55Z |
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/10.1016/j.anireprosci.2022.107090 Animal Reproduction Science, v. 247. 0378-4320 http://hdl.handle.net/11449/246255 10.1016/j.anireprosci.2022.107090 2-s2.0-85141512700 |
url |
http://dx.doi.org/10.1016/j.anireprosci.2022.107090 http://hdl.handle.net/11449/246255 |
identifier_str_mv |
Animal Reproduction Science, v. 247. 0378-4320 10.1016/j.anireprosci.2022.107090 2-s2.0-85141512700 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Animal Reproduction Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
|
_version_ |
1803046402293497856 |