FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL

Detalhes bibliográficos
Autor(a) principal: McManus, Concepta Margaret
Data de Publicação: 2014
Outros Autores: Louvandini, Helder, do Paim, Tiago Prado, Paula e Silva, Flávia Cristina, Bernal, Francisco Ernesto Moreno
Tipo de documento: Artigo
Idioma: por
Título da fonte: Ciência animal brasileira (Online)
Texto Completo: https://revistas.ufg.br/vet/article/view/8726
Resumo: This study compared the adaptation traits in common crosses of crossbred dairy cattle in central Brazil. Twenty animals of each of three genetic groups were used: zebu (Bos indicus), Simmental x Zebu (SZ) and Holstein x Zebu (HZ). The test measured variations in rectal temperature (RT), respiration rate (RR) and heart rate (HR) of animals in the shade and after exposure to the sun, as well as mean daily milk production throughout the lactation period. The procedure was repeated three times. There were significant interactions between test group and genetic group for the traits investigated and the correlations among traits were low. The RR of the crossbred groups may be controlling body temperature in such a way as not to cause an increase in RT. Milk production influenced RR in crossbred cows exposed to the sun, confirming their poorer adaptation in comparison with zebu cows. We observed that the adaptation can be measured in terms of production within the same genetic group. In conclusion, the crosses with European breeds produced more milk than zebu, although they were influenced by heat/solar radiation.KEYWORDS: dairy cattle, heart rate, milk production, rectal temperature, respiration rate. 
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spelling FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZILFATORES QUE AFETAM A TOLERÂNCIA AO CALOR EM GADO MESTIÇO NO BRASIL CENTRALenvironmentfreqüência cardíacafreqüência respiratóriotemperatura retalproductção leiteThis study compared the adaptation traits in common crosses of crossbred dairy cattle in central Brazil. Twenty animals of each of three genetic groups were used: zebu (Bos indicus), Simmental x Zebu (SZ) and Holstein x Zebu (HZ). The test measured variations in rectal temperature (RT), respiration rate (RR) and heart rate (HR) of animals in the shade and after exposure to the sun, as well as mean daily milk production throughout the lactation period. The procedure was repeated three times. There were significant interactions between test group and genetic group for the traits investigated and the correlations among traits were low. The RR of the crossbred groups may be controlling body temperature in such a way as not to cause an increase in RT. Milk production influenced RR in crossbred cows exposed to the sun, confirming their poorer adaptation in comparison with zebu cows. We observed that the adaptation can be measured in terms of production within the same genetic group. In conclusion, the crosses with European breeds produced more milk than zebu, although they were influenced by heat/solar radiation.KEYWORDS: dairy cattle, heart rate, milk production, rectal temperature, respiration rate. Este estudo comparou as características de adaptação em cruzamentos comuns de gado leiteiro mestiços no Brasil central. Foram utilizados vinte animais de cada um dos três grupos genéticos: Zebu (Bos indicus), Simental x Zebu (SZ) e Holandês x Zebu (HZ). Foi medida a variação da temperatura retal (RT), frequência respiratória (RR) e frequência cardíaca (HR) dos animais à sombra e depois da exposição ao sol, bem como a produção média diária de leite durante todo o período de lactação. O procedimento foi repetido três vezes. Houve interações significativas entre o grupo teste e grupo genético para as características investigadas e as correlações entre as características foram baixas. A RR dos grupos mestiços parece controlar a temperatura corporal de maneira que não cause um aumento na RT. A produção de leite influenciou RR em vacas mestiças expostas ao sol, o que confirma a adaptação mais pobre em comparação com vacas zebuínas. Observou-se que a adaptação pode ser medida em termos de produção dentro do mesmo grupo genético. Em conclusão, os cruzamentos com raças europeias produziram mais leite do que o zebu, apesar de terem sido influenciados pelo calor da radiação / solar.PALAVRAS-CHAVE: frequência cardíaca, frequência respiratória, gado leiteiro, temperatura retal, produção de leite.  Universidade Federal de Goiás2014-06-29info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionResearchAvaliado por paresPesquisa Científicaapplication/pdftext/htmlhttps://revistas.ufg.br/vet/article/view/872610.5216/cab.v15i2.8726Brazilian Animal Science/ Ciência Animal Brasileira; Vol. 15 No. 2 (2014); 152-158Ciência Animal Brasileira / Brazilian Animal Science; v. 15 n. 2 (2014); 152-1581809-68911518-2797reponame:Ciência animal brasileira (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGporhttps://revistas.ufg.br/vet/article/view/8726/16709https://revistas.ufg.br/vet/article/view/8726/16710McManus, Concepta MargaretLouvandini, Helderdo Paim, Tiago PradoPaula e Silva, Flávia CristinaBernal, Francisco Ernesto Morenoinfo:eu-repo/semantics/openAccess2014-06-30T13:37:48Zoai:ojs.revistas.ufg.br:article/8726Revistahttps://revistas.ufg.br/vetPUBhttps://revistas.ufg.br/vet/oai||revistacab@gmail.com1809-68911518-2797opendoar:2024-05-21T19:55:41.098641Ciência animal brasileira (Online) - Universidade Federal de Goiás (UFG)true
dc.title.none.fl_str_mv FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
FATORES QUE AFETAM A TOLERÂNCIA AO CALOR EM GADO MESTIÇO NO BRASIL CENTRAL
title FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
spellingShingle FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
McManus, Concepta Margaret
environment
freqüência cardíaca
freqüência respiratório
temperatura retal
productção leite
title_short FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
title_full FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
title_fullStr FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
title_full_unstemmed FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
title_sort FACTORS AFFECTING HEAT TOLERANCE IN CROSSBRED CATTLE IN CENTRAL BRAZIL
author McManus, Concepta Margaret
author_facet McManus, Concepta Margaret
Louvandini, Helder
do Paim, Tiago Prado
Paula e Silva, Flávia Cristina
Bernal, Francisco Ernesto Moreno
author_role author
author2 Louvandini, Helder
do Paim, Tiago Prado
Paula e Silva, Flávia Cristina
Bernal, Francisco Ernesto Moreno
author2_role author
author
author
author
dc.contributor.author.fl_str_mv McManus, Concepta Margaret
Louvandini, Helder
do Paim, Tiago Prado
Paula e Silva, Flávia Cristina
Bernal, Francisco Ernesto Moreno
dc.subject.por.fl_str_mv environment
freqüência cardíaca
freqüência respiratório
temperatura retal
productção leite
topic environment
freqüência cardíaca
freqüência respiratório
temperatura retal
productção leite
description This study compared the adaptation traits in common crosses of crossbred dairy cattle in central Brazil. Twenty animals of each of three genetic groups were used: zebu (Bos indicus), Simmental x Zebu (SZ) and Holstein x Zebu (HZ). The test measured variations in rectal temperature (RT), respiration rate (RR) and heart rate (HR) of animals in the shade and after exposure to the sun, as well as mean daily milk production throughout the lactation period. The procedure was repeated three times. There were significant interactions between test group and genetic group for the traits investigated and the correlations among traits were low. The RR of the crossbred groups may be controlling body temperature in such a way as not to cause an increase in RT. Milk production influenced RR in crossbred cows exposed to the sun, confirming their poorer adaptation in comparison with zebu cows. We observed that the adaptation can be measured in terms of production within the same genetic group. In conclusion, the crosses with European breeds produced more milk than zebu, although they were influenced by heat/solar radiation.KEYWORDS: dairy cattle, heart rate, milk production, rectal temperature, respiration rate. 
publishDate 2014
dc.date.none.fl_str_mv 2014-06-29
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Research
Avaliado por pares
Pesquisa Científica
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://revistas.ufg.br/vet/article/view/8726
10.5216/cab.v15i2.8726
url https://revistas.ufg.br/vet/article/view/8726
identifier_str_mv 10.5216/cab.v15i2.8726
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://revistas.ufg.br/vet/article/view/8726/16709
https://revistas.ufg.br/vet/article/view/8726/16710
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
text/html
dc.publisher.none.fl_str_mv Universidade Federal de Goiás
publisher.none.fl_str_mv Universidade Federal de Goiás
dc.source.none.fl_str_mv Brazilian Animal Science/ Ciência Animal Brasileira; Vol. 15 No. 2 (2014); 152-158
Ciência Animal Brasileira / Brazilian Animal Science; v. 15 n. 2 (2014); 152-158
1809-6891
1518-2797
reponame:Ciência animal brasileira (Online)
instname:Universidade Federal de Goiás (UFG)
instacron:UFG
instname_str Universidade Federal de Goiás (UFG)
instacron_str UFG
institution UFG
reponame_str Ciência animal brasileira (Online)
collection Ciência animal brasileira (Online)
repository.name.fl_str_mv Ciência animal brasileira (Online) - Universidade Federal de Goiás (UFG)
repository.mail.fl_str_mv ||revistacab@gmail.com
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