Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Scientiarum. Animal Sciences (Online) |
Texto Completo: | https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/59307 |
Resumo: | The objective was to assess the physiological and behavioral variables of pasture-raised Holstein heifers on the basis of their coat color. Eight heifers were used, four with black coat, and four with white coat. In the morning and afternoon periods, their physiological variables were measured, namely respiratory rate (RR, mov min. -1), rectal temperature (TR, ºC), and coat surface temperature (TS, ºC). The behavior analysis considered the site (sun or shade), position (standing or lying down), and activities (idleness, rumination, grazing, and others). The data of the physiological variables were assessed through analysis of variance, and significance, through Tukey’s test at 5%, while behavioral data were assessed using the Chi-squared test (SAS Software). There was a difference for all of the heifers’ physiological variables as a function of coat color (p < 0.0001) and period (p < 0.0001), with black ones showing greater results than white ones as to all physiological variables in the afternoon period (p < 0.0001). Grazing behavior is reduced during the hottest hours of the day. We conclude that solar radiation changes the physiological variables and grazing behavior of pasture-raised Holstein heifers. |
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Effect of solar radiation on Holstein heifers’ physiological variables and grazing behaviorEffect of solar radiation on Holstein heifers’ physiological variables and grazing behaviorbiometeorology; heat load; coat color; surface temperature.biometeorology; heat load; coat color; surface temperature.The objective was to assess the physiological and behavioral variables of pasture-raised Holstein heifers on the basis of their coat color. Eight heifers were used, four with black coat, and four with white coat. In the morning and afternoon periods, their physiological variables were measured, namely respiratory rate (RR, mov min. -1), rectal temperature (TR, ºC), and coat surface temperature (TS, ºC). The behavior analysis considered the site (sun or shade), position (standing or lying down), and activities (idleness, rumination, grazing, and others). The data of the physiological variables were assessed through analysis of variance, and significance, through Tukey’s test at 5%, while behavioral data were assessed using the Chi-squared test (SAS Software). There was a difference for all of the heifers’ physiological variables as a function of coat color (p < 0.0001) and period (p < 0.0001), with black ones showing greater results than white ones as to all physiological variables in the afternoon period (p < 0.0001). Grazing behavior is reduced during the hottest hours of the day. We conclude that solar radiation changes the physiological variables and grazing behavior of pasture-raised Holstein heifers.The objective was to assess the physiological and behavioral variables of pasture-raised Holstein heifers on the basis of their coat color. Eight heifers were used, four with black coat, and four with white coat. In the morning and afternoon periods, their physiological variables were measured, namely respiratory rate (RR, mov min. -1), rectal temperature (TR, ºC), and coat surface temperature (TS, ºC). The behavior analysis considered the site (sun or shade), position (standing or lying down), and activities (idleness, rumination, grazing, and others). The data of the physiological variables were assessed through analysis of variance, and significance, through Tukey’s test at 5%, while behavioral data were assessed using the Chi-squared test (SAS Software). There was a difference for all of the heifers’ physiological variables as a function of coat color (p < 0.0001) and period (p < 0.0001), with black ones showing greater results than white ones as to all physiological variables in the afternoon period (p < 0.0001). Grazing behavior is reduced during the hottest hours of the day. We conclude that solar radiation changes the physiological variables and grazing behavior of pasture-raised Holstein heifers.Editora da Universidade Estadual de Maringá2023-03-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/5930710.4025/actascianimsci.v45i1.59307Acta Scientiarum. Animal Sciences; Vol 45 (2023): Publicação contínua; e59307Acta Scientiarum. Animal Sciences; v. 45 (2023): Publicação contínua; e593071807-86721806-2636reponame:Acta Scientiarum. Animal Sciences (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMenghttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/59307/751375155665Copyright (c) 2023 Acta Scientiarum. Animal Scienceshttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessPereira, Ana Flávia Brunheira Silva, Mariana Letícia Gil Oliveira, Evandro Menezes deNascimento, Sheila Tavares Toledo, Juliana Beatriz2023-05-16T12:08:47Zoai:periodicos.uem.br/ojs:article/59307Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/oaiactaanim@uem.br||actaanim@uem.br|| rev.acta@gmail.com1807-86721806-2636opendoar:2023-05-16T12:08:47Acta Scientiarum. Animal Sciences (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior |
title |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior |
spellingShingle |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior Pereira, Ana Flávia Brunheira biometeorology; heat load; coat color; surface temperature. biometeorology; heat load; coat color; surface temperature. |
title_short |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior |
title_full |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior |
title_fullStr |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior |
title_full_unstemmed |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior |
title_sort |
Effect of solar radiation on Holstein heifers’ physiological variables and grazing behavior |
author |
Pereira, Ana Flávia Brunheira |
author_facet |
Pereira, Ana Flávia Brunheira Silva, Mariana Letícia Gil Oliveira, Evandro Menezes de Nascimento, Sheila Tavares Toledo, Juliana Beatriz |
author_role |
author |
author2 |
Silva, Mariana Letícia Gil Oliveira, Evandro Menezes de Nascimento, Sheila Tavares Toledo, Juliana Beatriz |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Pereira, Ana Flávia Brunheira Silva, Mariana Letícia Gil Oliveira, Evandro Menezes de Nascimento, Sheila Tavares Toledo, Juliana Beatriz |
dc.subject.por.fl_str_mv |
biometeorology; heat load; coat color; surface temperature. biometeorology; heat load; coat color; surface temperature. |
topic |
biometeorology; heat load; coat color; surface temperature. biometeorology; heat load; coat color; surface temperature. |
description |
The objective was to assess the physiological and behavioral variables of pasture-raised Holstein heifers on the basis of their coat color. Eight heifers were used, four with black coat, and four with white coat. In the morning and afternoon periods, their physiological variables were measured, namely respiratory rate (RR, mov min. -1), rectal temperature (TR, ºC), and coat surface temperature (TS, ºC). The behavior analysis considered the site (sun or shade), position (standing or lying down), and activities (idleness, rumination, grazing, and others). The data of the physiological variables were assessed through analysis of variance, and significance, through Tukey’s test at 5%, while behavioral data were assessed using the Chi-squared test (SAS Software). There was a difference for all of the heifers’ physiological variables as a function of coat color (p < 0.0001) and period (p < 0.0001), with black ones showing greater results than white ones as to all physiological variables in the afternoon period (p < 0.0001). Grazing behavior is reduced during the hottest hours of the day. We conclude that solar radiation changes the physiological variables and grazing behavior of pasture-raised Holstein heifers. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-03-27 |
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://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/59307 10.4025/actascianimsci.v45i1.59307 |
url |
https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/59307 |
identifier_str_mv |
10.4025/actascianimsci.v45i1.59307 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/59307/751375155665 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2023 Acta Scientiarum. Animal Sciences http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2023 Acta Scientiarum. Animal Sciences http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Editora da Universidade Estadual de Maringá |
publisher.none.fl_str_mv |
Editora da Universidade Estadual de Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Animal Sciences; Vol 45 (2023): Publicação contínua; e59307 Acta Scientiarum. Animal Sciences; v. 45 (2023): Publicação contínua; e59307 1807-8672 1806-2636 reponame:Acta Scientiarum. Animal Sciences (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum. Animal Sciences (Online) |
collection |
Acta Scientiarum. Animal Sciences (Online) |
repository.name.fl_str_mv |
Acta Scientiarum. Animal Sciences (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
actaanim@uem.br||actaanim@uem.br|| rev.acta@gmail.com |
_version_ |
1799315364230725632 |