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| Provedor de dados: |
Animal Sciences
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| País: |
Brazil
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| Título: |
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
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| Autores: |
Lima, Ivalda de Albuquerque; Universidade Federal Rural de Pernambuco
Azevedo, Marcilio de; Universidade Federal Rural de Pernambuco
Borges, Christhiano Raphael de Albuquerque; Universidade Federal Rural de Pernambuco
Ferreira, Marcelo de Andrade; Universidade Federal Rural de Pernambuco
Guim, Adriana; Universidade Federal Rural de Pernambuco
Almeida, Gledson Luiz Pontes de; Universidade Federal Rural de Pernambuco
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| Data: |
2012-12-03
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| Ano: |
2012
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| Palavras-chave: |
Dairy cattle raising
Heat stress
Physiological parameters
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| 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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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Português
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591
10.4025/actascianimsci.v35i2.16591
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| Editor: |
Editora da Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/pdf
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591/pdf_1
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/downloadSuppFile/16591/3927
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| Formato: |
application/pdf
application/pdf
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| Fonte: |
Acta Scientiarum. Animal Sciences; v. 35, n. 2 (2013); 193-199
Acta Scientiarum. Animal Sciences; v. 35, n. 2 (2013); 193-199
1807-8672
1806-2636
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| Direitos: |
DECLARATION OF ORIGINALITY AND CESSATION OF COPYRIGHTI Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal. I also declare that once published in the Acta Scientiarum. Animal Sciences, a publication of the Universidade Estadual de Maringá, it will not be submitted by me or by any co-author to any scientific communication mean. In my name and in the name of co-authors, I shall cede the copyright of the above mentioned article to the Universidade Estadual de Maringá and I declare that I know that the non-observance of this norm may make me liable for the penalties contemplated in the Law for the Protection of Authors’ Rights (Act 9609 of the 19th February 1998).
DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAIS Declaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Animal Sciences, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).
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