Infrared thermography as a method for evaluating the heat tolerance in dairy cows
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Publication Date: | 2017 |
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Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UnB |
Download full: | http://repositorio.unb.br/handle/10482/30824 http://dx.doi.org/10.1590/s1806-92902017000500002 |
Summary: | The objective of this study was to determine whether infrared thermography is a useful tool for the recognition of dairy cows in a state of thermal heat stress, as well as to identify the best region of the animal to be evaluated for this recognition. Physiological variables, including rectal temperature, respiratory frequency, cardiac frequency, and panting score were recorded in 38 lactating cows. For the assessment of environmental parameters, a digital black globe thermometer (TGD-200 model) was used. Thermographic photographs of different regions of the body of cows were taken using an infrared camera (FLIR® System T300) and indicated respective superficial temperature. Physiological variables and superficial body temperature in different regions varied between genetic groups (Girolando: ½ Holstein × ½ Gir and ¾ Holstein × ¼ Gir; purebred Holstein). The environmental temperature ranged from 20.7 to 37.9 °C with a relative humidity reaching 95%. The mean rectal temperature (40.84 °C), respiratory frequency (111.36 breaths/min), and cardiac frequency (99.22 beats/min) were higher for pure Holstein than for Girolando cows. Positive correlations were found between the physiological parameters and thermographic measures. The highest positive correlation (0.74) was found between the temperature in the lateral region of the udder and rectal temperature. Thermography is a good indicator of thermal comfort. The best region to identify heat stress in cows using thermography is the lateral region of the udder. |
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Daltro, Darlene dos SantosFischer, VivianAlfonzo, Evelyn Priscila MünchenDalcin, Vanessa CalderaroStumpf, Marcelo TempelKolling, Giovani JacobSilva, Marcos Vinícius Gualberto Barbosa daPimentel, Concepta Margaret McManus2018-01-04T19:15:07Z2018-01-04T19:15:07Z2017-05DALTRO, Darlene dos Santos et al. Infrared thermography as a method for evaluating the heat tolerance in dairy cows. Revista Brasileira de Zootecnia, Viçosa, v. 46, n. 5, p. 374-383, maio 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500374&lng=en&nrm=iso>. Acesso em: 17 jan. 2018. doi: http://dx.doi.org/10.1590/s1806-92902017000500002.http://repositorio.unb.br/handle/10482/30824http://dx.doi.org/10.1590/s1806-92902017000500002Sociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia - This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500374&lng=en&nrm=iso. Acesso em: 17 jan. 2018.info:eu-repo/semantics/openAccessInfrared thermography as a method for evaluating the heat tolerance in dairy cowsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleAnimais - proteçãoBovino de leiteConforto térmicoThe objective of this study was to determine whether infrared thermography is a useful tool for the recognition of dairy cows in a state of thermal heat stress, as well as to identify the best region of the animal to be evaluated for this recognition. Physiological variables, including rectal temperature, respiratory frequency, cardiac frequency, and panting score were recorded in 38 lactating cows. For the assessment of environmental parameters, a digital black globe thermometer (TGD-200 model) was used. Thermographic photographs of different regions of the body of cows were taken using an infrared camera (FLIR® System T300) and indicated respective superficial temperature. Physiological variables and superficial body temperature in different regions varied between genetic groups (Girolando: ½ Holstein × ½ Gir and ¾ Holstein × ¼ Gir; purebred Holstein). The environmental temperature ranged from 20.7 to 37.9 °C with a relative humidity reaching 95%. The mean rectal temperature (40.84 °C), respiratory frequency (111.36 breaths/min), and cardiac frequency (99.22 beats/min) were higher for pure Holstein than for Girolando cows. Positive correlations were found between the physiological parameters and thermographic measures. The highest positive correlation (0.74) was found between the temperature in the lateral region of the udder and rectal temperature. Thermography is a good indicator of thermal comfort. The best region to identify heat stress in cows using thermography is the lateral region of the udder.engreponame:Repositório Institucional da UnBinstname:Universidade de Brasília (UnB)instacron:UNBORIGINALARTIGO_InfraredThermographyMethod.pdfapplication/pdf1742584http://repositorio2.unb.br/jspui/bitstream/10482/30824/1/ARTIGO_InfraredThermographyMethod.pdf140e37615fe7436aac110ed6a92a7b29MD51open access10482/308242023-05-24 20:39:10.994open accessoai:repositorio2.unb.br:10482/30824Biblioteca Digital de Teses e DissertaçõesPUBhttps://repositorio.unb.br/oai/requestopendoar:2023-05-24T23:39:10Repositório Institucional da UnB - Universidade de Brasília (UnB)false |
dc.title.pt_BR.fl_str_mv |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows |
title |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows |
spellingShingle |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows Daltro, Darlene dos Santos Animais - proteção Bovino de leite Conforto térmico |
title_short |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows |
title_full |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows |
title_fullStr |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows |
title_full_unstemmed |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows |
title_sort |
Infrared thermography as a method for evaluating the heat tolerance in dairy cows |
author |
Daltro, Darlene dos Santos |
author_facet |
Daltro, Darlene dos Santos Fischer, Vivian Alfonzo, Evelyn Priscila München Dalcin, Vanessa Calderaro Stumpf, Marcelo Tempel Kolling, Giovani Jacob Silva, Marcos Vinícius Gualberto Barbosa da Pimentel, Concepta Margaret McManus |
author_role |
author |
author2 |
Fischer, Vivian Alfonzo, Evelyn Priscila München Dalcin, Vanessa Calderaro Stumpf, Marcelo Tempel Kolling, Giovani Jacob Silva, Marcos Vinícius Gualberto Barbosa da Pimentel, Concepta Margaret McManus |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Daltro, Darlene dos Santos Fischer, Vivian Alfonzo, Evelyn Priscila München Dalcin, Vanessa Calderaro Stumpf, Marcelo Tempel Kolling, Giovani Jacob Silva, Marcos Vinícius Gualberto Barbosa da Pimentel, Concepta Margaret McManus |
dc.subject.keyword.pt_BR.fl_str_mv |
Animais - proteção Bovino de leite Conforto térmico |
topic |
Animais - proteção Bovino de leite Conforto térmico |
description |
The objective of this study was to determine whether infrared thermography is a useful tool for the recognition of dairy cows in a state of thermal heat stress, as well as to identify the best region of the animal to be evaluated for this recognition. Physiological variables, including rectal temperature, respiratory frequency, cardiac frequency, and panting score were recorded in 38 lactating cows. For the assessment of environmental parameters, a digital black globe thermometer (TGD-200 model) was used. Thermographic photographs of different regions of the body of cows were taken using an infrared camera (FLIR® System T300) and indicated respective superficial temperature. Physiological variables and superficial body temperature in different regions varied between genetic groups (Girolando: ½ Holstein × ½ Gir and ¾ Holstein × ¼ Gir; purebred Holstein). The environmental temperature ranged from 20.7 to 37.9 °C with a relative humidity reaching 95%. The mean rectal temperature (40.84 °C), respiratory frequency (111.36 breaths/min), and cardiac frequency (99.22 beats/min) were higher for pure Holstein than for Girolando cows. Positive correlations were found between the physiological parameters and thermographic measures. The highest positive correlation (0.74) was found between the temperature in the lateral region of the udder and rectal temperature. Thermography is a good indicator of thermal comfort. The best region to identify heat stress in cows using thermography is the lateral region of the udder. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-05 |
dc.date.accessioned.fl_str_mv |
2018-01-04T19:15:07Z |
dc.date.available.fl_str_mv |
2018-01-04T19:15:07Z |
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info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
DALTRO, Darlene dos Santos et al. Infrared thermography as a method for evaluating the heat tolerance in dairy cows. Revista Brasileira de Zootecnia, Viçosa, v. 46, n. 5, p. 374-383, maio 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500374&lng=en&nrm=iso>. Acesso em: 17 jan. 2018. doi: http://dx.doi.org/10.1590/s1806-92902017000500002. |
dc.identifier.uri.fl_str_mv |
http://repositorio.unb.br/handle/10482/30824 |
dc.identifier.doi.pt_BR.fl_str_mv |
http://dx.doi.org/10.1590/s1806-92902017000500002 |
identifier_str_mv |
DALTRO, Darlene dos Santos et al. Infrared thermography as a method for evaluating the heat tolerance in dairy cows. Revista Brasileira de Zootecnia, Viçosa, v. 46, n. 5, p. 374-383, maio 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500374&lng=en&nrm=iso>. Acesso em: 17 jan. 2018. doi: http://dx.doi.org/10.1590/s1806-92902017000500002. |
url |
http://repositorio.unb.br/handle/10482/30824 http://dx.doi.org/10.1590/s1806-92902017000500002 |
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eng |
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Sociedade Brasileira de Zootecnia |
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Sociedade Brasileira de Zootecnia |
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