Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por eng |
Título da fonte: | Acta Scientiarum. Animal Sciences (Online) |
Texto Completo: | https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591 |
Resumo: | This work was carried out to evaluate the physiological thermoregulation responses of Girolando-breed dairy cows kept in feedlot during summertime. A total of 15 animals were used, belonging to three genetic groups: 1/2, 5/8 and 3/4 Holstein-Gir (HG), with five cows from each genetic group, distributed in a completely randomized design, in subplots. The physiological parameters were sweat rate (SR), respiratory rate (RR), epidermis temperature (ET) and coat surface temperature (CST), and were evaluated once a week, during nine weeks, from December 2009 to February 2010, totaling 135 observations. Throughout the experimental period, climatic data were recorded using an automated weather station, and later used to calculate the different thermal comfort indexes: THI (temperature-humidity index), BGHI (black globe temperature and humidity index) and RTL (radiant thermal load). 1/2 HG animals showed the highest SR and lowest RR, ET and CST of all three genetic groups, while 3/4 HG cows had the lowest mean SR and highest ET and CST. 5/8 HG cows had intermediate values for SR, ET and CST. Mean RR values did not differ between 5/8 and 3/4 HG cows. It was concluded that animals from genetic groups 3/4 and 5/8 HG showed greater sensibility to heat stress than 1/2 HG cows. |
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Acta Scientiarum. Animal Sciences (Online) |
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Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591dairy cattle raisingheat stressphysiological parametersThis work was carried out to evaluate the physiological thermoregulation responses of Girolando-breed dairy cows kept in feedlot during summertime. A total of 15 animals were used, belonging to three genetic groups: 1/2, 5/8 and 3/4 Holstein-Gir (HG), with five cows from each genetic group, distributed in a completely randomized design, in subplots. The physiological parameters were sweat rate (SR), respiratory rate (RR), epidermis temperature (ET) and coat surface temperature (CST), and were evaluated once a week, during nine weeks, from December 2009 to February 2010, totaling 135 observations. Throughout the experimental period, climatic data were recorded using an automated weather station, and later used to calculate the different thermal comfort indexes: THI (temperature-humidity index), BGHI (black globe temperature and humidity index) and RTL (radiant thermal load). 1/2 HG animals showed the highest SR and lowest RR, ET and CST of all three genetic groups, while 3/4 HG cows had the lowest mean SR and highest ET and CST. 5/8 HG cows had intermediate values for SR, ET and CST. Mean RR values did not differ between 5/8 and 3/4 HG cows. It was concluded that animals from genetic groups 3/4 and 5/8 HG showed greater sensibility to heat stress than 1/2 HG cows. Editora da Universidade Estadual de Maringá2012-12-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionpesquisa de campoapplication/pdfapplication/pdfapplication/pdfhttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1659110.4025/actascianimsci.v35i2.16591Acta Scientiarum. Animal Sciences; Vol 35 No 2 (2013); 193-199Acta Scientiarum. Animal Sciences; v. 35 n. 2 (2013); 193-1991807-86721806-2636reponame:Acta Scientiarum. Animal Sciences (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporenghttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/pdfhttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/pdf_1https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/751375141565Lima, Ivalda de AlbuquerqueAzevedo, Marcilio deBorges, Christhiano Raphael de AlbuquerqueFerreira, Marcelo de AndradeGuim, AdrianaAlmeida, Gledson Luiz Pontes deinfo:eu-repo/semantics/openAccess2024-05-17T13:04:33Zoai:periodicos.uem.br/ojs:article/16591Revistahttp://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:2024-05-17T13:04:33Acta Scientiarum. Animal Sciences (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 |
title |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 |
spellingShingle |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 Lima, Ivalda de Albuquerque dairy cattle raising heat stress physiological parameters |
title_short |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 |
title_full |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 |
title_fullStr |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 |
title_full_unstemmed |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 |
title_sort |
Thermoregulation of Girolando cows during summertime, in Pernambuco State, Brazil - doi: 10.4025/actascianimsci.v35i2.16591 |
author |
Lima, Ivalda de Albuquerque |
author_facet |
Lima, Ivalda de Albuquerque Azevedo, Marcilio de Borges, Christhiano Raphael de Albuquerque Ferreira, Marcelo de Andrade Guim, Adriana Almeida, Gledson Luiz Pontes de |
author_role |
author |
author2 |
Azevedo, Marcilio de Borges, Christhiano Raphael de Albuquerque Ferreira, Marcelo de Andrade Guim, Adriana Almeida, Gledson Luiz Pontes de |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lima, Ivalda de Albuquerque Azevedo, Marcilio de Borges, Christhiano Raphael de Albuquerque Ferreira, Marcelo de Andrade Guim, Adriana Almeida, Gledson Luiz Pontes de |
dc.subject.por.fl_str_mv |
dairy cattle raising heat stress physiological parameters |
topic |
dairy cattle raising heat stress physiological parameters |
description |
This work was carried out to evaluate the physiological thermoregulation responses of Girolando-breed dairy cows kept in feedlot during summertime. A total of 15 animals were used, belonging to three genetic groups: 1/2, 5/8 and 3/4 Holstein-Gir (HG), with five cows from each genetic group, distributed in a completely randomized design, in subplots. The physiological parameters were sweat rate (SR), respiratory rate (RR), epidermis temperature (ET) and coat surface temperature (CST), and were evaluated once a week, during nine weeks, from December 2009 to February 2010, totaling 135 observations. Throughout the experimental period, climatic data were recorded using an automated weather station, and later used to calculate the different thermal comfort indexes: THI (temperature-humidity index), BGHI (black globe temperature and humidity index) and RTL (radiant thermal load). 1/2 HG animals showed the highest SR and lowest RR, ET and CST of all three genetic groups, while 3/4 HG cows had the lowest mean SR and highest ET and CST. 5/8 HG cows had intermediate values for SR, ET and CST. Mean RR values did not differ between 5/8 and 3/4 HG cows. It was concluded that animals from genetic groups 3/4 and 5/8 HG showed greater sensibility to heat stress than 1/2 HG cows. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-12-03 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion pesquisa de campo |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591 10.4025/actascianimsci.v35i2.16591 |
url |
https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591 |
identifier_str_mv |
10.4025/actascianimsci.v35i2.16591 |
dc.language.iso.fl_str_mv |
por eng |
language |
por eng |
dc.relation.none.fl_str_mv |
https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/pdf https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/pdf_1 https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/751375141565 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf 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 35 No 2 (2013); 193-199 Acta Scientiarum. Animal Sciences; v. 35 n. 2 (2013); 193-199 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_ |
1799315360713801728 |