Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35221 |
Resumo: | Bull selection by andrological examination aims to estimate the reproductive capacity of the male. Bulls of zebu origin adapt better to high temperatures than bulls of taurine origin, which may influence scrotum temperature and seminal quality due to the imbalance of testicular thermoregulation. The objective of this study was to investigate the relationship between bioclimatic variables, the temperature of body and scrotal areas, assessed with infrared thermography, and the quality of fresh and post-thawed semen in zebu Nelore bulls (Bos taurus indicus) and Girolando bulls (Bos taurus taurus x Bos taurus indicus). Bulls were kept in pickets with access to water, mineral mix and a diet supplemented with concentrate. Infrared thermographs of the scrotum, orbital globe and muzzle were performed twice a week with a Flir E40 thermal imager. For scrotal thermograms, we analyzed the temperatures of the spermatic cord, proximal and distal portion of the testes and tail of the epididymis using the Flir Tools software. Samples were collected using an artificial vagina and the ejaculates were processed and frozen in liquid nitrogen until further analyses. Data were analyzed with the Tukey test or the Kruskall-Wallis test, depending on their normal distribution. Our results showed differences (p < 0.05) between the two breeds regarding the temperature in the ocular globe, spermatic cord and proximal portion of the scrotum. Nelore bulls presented lower temperature in the body and in certain regions of the scrotum compared to Girolando bulls. Seminal characteristics varied between breeds, with the Nelore breed presenting better semen. Positive correlations were observed between minor sperm defects and ventral regions of the testes and tails of the epididymis in Girolando bulls. Nelore bulls were less influenced by climatic variables and presented lower temperature in skin surface areas in the infrared thermography examination compared to Girolando bulls. Nelore bulls presented superior semen quality in both fresh and thawed samples than Girolando bulls. |
id |
UEL-11_5ec01316313729abfe0273b03aaf0d73 |
---|---|
oai_identifier_str |
oai:ojs.pkp.sfu.ca:article/35221 |
network_acronym_str |
UEL-11 |
network_name_str |
Semina. Ciências Agrárias (Online) |
repository_id_str |
|
spelling |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bullsTermografia escrotal e a relação com a qualidade seminal em touros Nelore e GirolandoInfrared thermographyTesticular thermoregulationSemen freezingBovine bulls.Termografia infravermelhaTermorregulação testicularCongelação de sêmenTouros bovinos.Bull selection by andrological examination aims to estimate the reproductive capacity of the male. Bulls of zebu origin adapt better to high temperatures than bulls of taurine origin, which may influence scrotum temperature and seminal quality due to the imbalance of testicular thermoregulation. The objective of this study was to investigate the relationship between bioclimatic variables, the temperature of body and scrotal areas, assessed with infrared thermography, and the quality of fresh and post-thawed semen in zebu Nelore bulls (Bos taurus indicus) and Girolando bulls (Bos taurus taurus x Bos taurus indicus). Bulls were kept in pickets with access to water, mineral mix and a diet supplemented with concentrate. Infrared thermographs of the scrotum, orbital globe and muzzle were performed twice a week with a Flir E40 thermal imager. For scrotal thermograms, we analyzed the temperatures of the spermatic cord, proximal and distal portion of the testes and tail of the epididymis using the Flir Tools software. Samples were collected using an artificial vagina and the ejaculates were processed and frozen in liquid nitrogen until further analyses. Data were analyzed with the Tukey test or the Kruskall-Wallis test, depending on their normal distribution. Our results showed differences (p < 0.05) between the two breeds regarding the temperature in the ocular globe, spermatic cord and proximal portion of the scrotum. Nelore bulls presented lower temperature in the body and in certain regions of the scrotum compared to Girolando bulls. Seminal characteristics varied between breeds, with the Nelore breed presenting better semen. Positive correlations were observed between minor sperm defects and ventral regions of the testes and tails of the epididymis in Girolando bulls. Nelore bulls were less influenced by climatic variables and presented lower temperature in skin surface areas in the infrared thermography examination compared to Girolando bulls. Nelore bulls presented superior semen quality in both fresh and thawed samples than Girolando bulls.A seleção de touros pelo exame andrológico visa estimar a capacidade reprodutiva do macho. Touros de origem zebuína apresentam melhor adaptabilidade às altas temperaturas, em relação aos touros de origem taurina, podendo influenciar na temperatura do escroto e na qualidade seminal pelo desequilíbrio da termorregulação testicular. Objetivou-se avaliar a influência das variáveis bioclimáticas e a relação de perfis de termogramas por infravermelho de áreas do corpo e escroto com a qualidade do sêmen fresco e descongelado em touros das raças Nelore e Girolando, mantidos em Central de Inseminação Artificial. Foram utilizados quatro touros Nelore e quatro Girolando, mantidos em piquetes com acesso a água e mistura mineral; e suplementação com concentrado. Termografias infravermelhas do escroto, globo ocular e mufla foram realizadas duas vezes por semana com termovisor Flir E40. Para os termogramas escrotais, as temperaturas do cordão espermático, porção proximal e distal dos testículos e cauda do epidídimo foram analisadas utilizando o software Flir Tools. Foram realizadas colheitas de sêmen com vagina artificial e os ejaculados processados e congelados em nitrogênio líquido e analisados na pós-descongelação. Os dados passaram pelo teste de normalidade e teste Tukey; e na ausência de normalidade pelo teste Kruskall- Wallis. Entre raças, foram observadas diferenças (P < 0,05) nas temperaturas do globo ocular, cordão espermático e porção proximal do escroto. Os touros Nelore apresentaram menor temperatura corpórea e de regiões do escroto, em relação aos touros Girolando. As características seminais variaram entre raças (P < 0,05), a raça Nelore apresentou sêmen de melhor qualidade. Correlações positivas (P < 0,05) foram observadas entre defeitos espermáticos menores e temperaturas da região ventral dos testículos e das caudas dos epidídimos. em touros Girolando. Os touros da raça Nelore sofreram menor influência das variáveis climáticas com menores temperaturas de áreas da superfície da pele examinada por termografia infravermelha, em relação aos touros da raça Girolando. Os touros da raça Nelore apresentaram qualidade do sêmen fresco e descongelado superiores, em relação aos touros da raça Girolando.UEL2020-01-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3522110.5433/1679-0359.2020v41n1p131Semina: Ciências Agrárias; Vol. 41 No. 1 (2020); 131-144Semina: Ciências Agrárias; v. 41 n. 1 (2020); 131-1441679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35221/26397Copyright (c) 2019 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessRedivo Júnior, NildoSouza, Camila Dutra deMartins, Ellyn Amanda FonsecaUherara, Tatiana IssaCattini, Milton MendesCreste, Daniel OliveiraRuediger, Felipe Rydygier deChacur, Marcelo George Mungai2022-10-10T14:30:10Zoai:ojs.pkp.sfu.ca:article/35221Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-10T14:30:10Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls Termografia escrotal e a relação com a qualidade seminal em touros Nelore e Girolando |
title |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls |
spellingShingle |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls Redivo Júnior, Nildo Infrared thermography Testicular thermoregulation Semen freezing Bovine bulls. Termografia infravermelha Termorregulação testicular Congelação de sêmen Touros bovinos. |
title_short |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls |
title_full |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls |
title_fullStr |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls |
title_full_unstemmed |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls |
title_sort |
Scrotal thermography to assess the seminal quality in Nelore and Girolando bulls |
author |
Redivo Júnior, Nildo |
author_facet |
Redivo Júnior, Nildo Souza, Camila Dutra de Martins, Ellyn Amanda Fonseca Uherara, Tatiana Issa Cattini, Milton Mendes Creste, Daniel Oliveira Ruediger, Felipe Rydygier de Chacur, Marcelo George Mungai |
author_role |
author |
author2 |
Souza, Camila Dutra de Martins, Ellyn Amanda Fonseca Uherara, Tatiana Issa Cattini, Milton Mendes Creste, Daniel Oliveira Ruediger, Felipe Rydygier de Chacur, Marcelo George Mungai |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Redivo Júnior, Nildo Souza, Camila Dutra de Martins, Ellyn Amanda Fonseca Uherara, Tatiana Issa Cattini, Milton Mendes Creste, Daniel Oliveira Ruediger, Felipe Rydygier de Chacur, Marcelo George Mungai |
dc.subject.por.fl_str_mv |
Infrared thermography Testicular thermoregulation Semen freezing Bovine bulls. Termografia infravermelha Termorregulação testicular Congelação de sêmen Touros bovinos. |
topic |
Infrared thermography Testicular thermoregulation Semen freezing Bovine bulls. Termografia infravermelha Termorregulação testicular Congelação de sêmen Touros bovinos. |
description |
Bull selection by andrological examination aims to estimate the reproductive capacity of the male. Bulls of zebu origin adapt better to high temperatures than bulls of taurine origin, which may influence scrotum temperature and seminal quality due to the imbalance of testicular thermoregulation. The objective of this study was to investigate the relationship between bioclimatic variables, the temperature of body and scrotal areas, assessed with infrared thermography, and the quality of fresh and post-thawed semen in zebu Nelore bulls (Bos taurus indicus) and Girolando bulls (Bos taurus taurus x Bos taurus indicus). Bulls were kept in pickets with access to water, mineral mix and a diet supplemented with concentrate. Infrared thermographs of the scrotum, orbital globe and muzzle were performed twice a week with a Flir E40 thermal imager. For scrotal thermograms, we analyzed the temperatures of the spermatic cord, proximal and distal portion of the testes and tail of the epididymis using the Flir Tools software. Samples were collected using an artificial vagina and the ejaculates were processed and frozen in liquid nitrogen until further analyses. Data were analyzed with the Tukey test or the Kruskall-Wallis test, depending on their normal distribution. Our results showed differences (p < 0.05) between the two breeds regarding the temperature in the ocular globe, spermatic cord and proximal portion of the scrotum. Nelore bulls presented lower temperature in the body and in certain regions of the scrotum compared to Girolando bulls. Seminal characteristics varied between breeds, with the Nelore breed presenting better semen. Positive correlations were observed between minor sperm defects and ventral regions of the testes and tails of the epididymis in Girolando bulls. Nelore bulls were less influenced by climatic variables and presented lower temperature in skin surface areas in the infrared thermography examination compared to Girolando bulls. Nelore bulls presented superior semen quality in both fresh and thawed samples than Girolando bulls. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-10 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35221 10.5433/1679-0359.2020v41n1p131 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35221 |
identifier_str_mv |
10.5433/1679-0359.2020v41n1p131 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35221/26397 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 41 No. 1 (2020); 131-144 Semina: Ciências Agrárias; v. 41 n. 1 (2020); 131-144 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1750315429425840128 |