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Registros recuperados : 12 | |
1. | | KERN, E. L.; COBUCI, J. A.; COSTA, C. N.; ALFONZO, E. P. M.; DALTRO, D. S. Factor analysis to evaluate the relationship between longevity, milk production and linear type traits in Holstein cows. In: ANNUAL MEETING BRAZILIAN SOCIETY OF ANIMAL SCIENCE, 50., 2013, Campinas. Proceedings... Campinas: Sociedade Brasileira de Zootecnia, 2013. Biblioteca(s): Embrapa Gado de Leite. |
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2. | | KERN, E. L.; COBUCI, J. A.; COSTA, C. N.; DALTRO, D. S.; ALFONZO, E. P. M.; SILVA, I. C. M. DA. Analysis of phenotypic factors for linear type in Holstein cows. In: ANNUAL MEETING BRAZILIAN SOCIETY OF ANIMAL SCIENCE, 50., 2013, Campinas. Proceedings... Campinas: Sociedade Brasileira de Zootecnia, 2013. Biblioteca(s): Embrapa Gado de Leite. |
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3. | | DALTRO, D. dos S.; FISCHER, V.; ALFONZO, E. P. M.; DALCIN, V. C.; STUMPF, M. T.; KOLLING, G.; SILVA, M. V. G. B.; McMANUS, C. M. Infrared thermography as a method for evaluating the heat tolerance in dairy cows. Revista Brasileira de Zootecnia, v. 46, n. 5, p. 374-383, 2017. Biblioteca(s): Embrapa Gado de Leite. |
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4. | | STUMPF, M. T.; FISCHER, V.; DALTRO, D. S.; ALFONZO, E. P. M.; KOLLING, G. J.; SILVA, M. V. G. B.; PEREIRA, L. G. R.; MCMANUS5, C. M. Mammary gland cell?s tight junction permeability from dairy cows producing stable or unstable milk in the ethanol test. International Journal of Biometeorology, v. 64, p. 1981-1983, 2020. Biblioteca(s): Embrapa Gado de Leite. |
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5. | | TORRES, H. A. L.; DALCIN, V. C.; DALTRO, D. dos S.; ALFONZO, E. P. M.; STUMPF, M. T.; SILVA, M. V. G. B.; FISCHER, V.; McMANUS, C. M. Parâmetros hematológicos relacionados com o índice de temperatura e umidade de bovinos leiteiros Holandês e Girolando sob estresse térmico. In: CONGRESSO INTERNACIONAL DO LEITE, 13., 2015, Porto Alegre. Anais... Juiz de Fora: Embrapa Gado de Leite, 2015. 4 p. Biblioteca(s): Embrapa Gado de Leite. |
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6. | | DALCIN, V. C.; FISCHER, V.; DALTRO, D. dos S.; ALFONZO, E. P. M.; STUMPF, M. T.; KOLLING, G. J.; SILVA, M. V. G. B.; McMANUS, C. Physiological parameters for thermal stress in dairy cattle. Revista Brasileira de Zootecnia, v. 45, n. 8, p. 458-465, 2016. Biblioteca(s): Embrapa Gado de Leite. |
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7. | | STUMPF, M. T.; PEREIRA, L. G. R.; PIMENTEL, C. M. M.; FISCHER, V.; KOLLING, G. J.; ALFONZO, E. P. M.; DALTRO, D. dos S.; DALCIN, V. C. Estresse térmico não altera a permeabilidade das junções firmes das células mamárias e a estabilidade do leite de vacas Holandês. In: CONGRESSO INTERNACIONAL DO LEITE, 13., 2015, Porto Alegre. Anais... Juiz de Fora: Embrapa Gado de Leite, 2015. 4 p. Biblioteca(s): Embrapa Gado de Leite. |
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8. | | ALFONZO, E. P. M.; DALTRO, D. dos S.; STUMPF, M. T.; DALCIN, V. C.; KOLLING, G.; SILVA, M. V. G. B.; FISCHER, V.; McMANUS, C. M. Correlações entre os parâmetros físicos, fisiológicos e a termografia em bovinos leiteiros submetidos ao estresse por calor. In: CONGRESSO INTERNACIONAL DO LEITE, 13., 2015, Porto Alegre. Anais... Juiz de Fora: Embrapa Gado de Leite, 2015. 4 p. Biblioteca(s): Embrapa Gado de Leite. |
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9. | | ALFONZO, E. P. M.; DALTRO, D. dos S.; STUMPF, M. T.; DALCIN, V. C.; SILVA, M. V. G. B.; TORRES, H. A. L.; FISCHER, V.; McMANUS, C. M. Relações entre atributos físicos e fisiológicos e estresse térmico em vacas leiteiras de diferentes grupos genéticos. In: CONGRESSO INTERNACIONAL DO LEITE, 13., 2015, Porto Alegre. Anais... Juiz de Fora: Embrapa Gado de Leite, 2015. 4 p. Biblioteca(s): Embrapa Gado de Leite. |
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10. | | LOPES, H. A. T.; DALTO, D. dos S.; ALFONZO, E. P. M.; STUMPF, M. T.; DALCIN, V. C.; SILVA, M. V. G. B.; FISCHER, V.; McMANUS, C. M. Uso da termografia infravermelha para avaliar a tolerância ao calor em bovinos de leite submetidos ao estresse térmico. In: CONGRESSO INTERNACIONAL DO LEITE, 13., 2015, Porto Alegre. Anais... Juiz de Fora: Embrapa Gado de Leite, 2015. Biblioteca(s): Embrapa Gado de Leite. |
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11. | | STUMPF, M. T.; KOLLING, G. J.; FISCHER, V.; DALTRO, D. dos S.; ALFONZO, E. P. M.; DALCIN, V. C.; DIAS, L. T.; SILVA, M. V. G. B.; PERIPOLLI, V.; MCMANUS, C. M. Elevated temperature-humidity index induces physiological, blood and milk alterations in Holstein cows in a more pronounced manner than in ½ and ¾ Holstein × Gir. Journal of Animal Behaviour and Biometeorology, v. 9, n. 4, p. 2140, 2021. Biblioteca(s): Embrapa Gado de Leite. |
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12. | | STUMPF, M. T.; MCMANUS, C. M.; DALTRO, D. S.; ALFONZO, E. P. M.; DALCIN, V.; KOLLING, G. J.; VIEIRA, R. A.; LOUVANDINI, H.; FISCHER, V.; SILVA, M. V. G. B. Different methods of assessing udder temperature through thermography and their relation with rectal temperature. Tropical Animal Health and Production, v. 53, article 44, 2021. Biblioteca(s): Embrapa Gado de Leite. |
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Registros recuperados : 12 | |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
12/12/2016 |
Data da última atualização: |
23/01/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
DALCIN, V. C.; FISCHER, V.; DALTRO, D. dos S.; ALFONZO, E. P. M.; STUMPF, M. T.; KOLLING, G. J.; SILVA, M. V. G. B.; McMANUS, C. |
Afiliação: |
Vanessa Calderaro Dalcin, UFRGS; Vivian Fischer, UFRGS; Darlene dos Santos Daltro, UFRGS; Evelyn Priscila München Alfonzo, UFRGS; Marcelo Tempel Stumpf, Universidade Federal do Rio Grande, São Lourenço do Sul, RS; Giovani Jacob Kolling, UFRGS; MARCOS VINICIUS GUALBERTO B SILVA, CNPGL; Concepta McManus, UNB. |
Título: |
Physiological parameters for thermal stress in dairy cattle. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 45, n. 8, p. 458-465, 2016. |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to investigate changes in physiological parameters of dairy cows and understand which physiological parameters show greater reliability for verification of heat stress. Blood samples were collected for analysis and included hematocrit (Ht), erythrocyte count (ERY), and hemoglobin count (HEMO). In addition, physiological variables, including rectal temperature (RT), heart rate (HR), respiratory rate (RR), and panting score (PS) were recorded in 38 lactating cows. These varied according to genetic group (½, ¾, and pure bred Holstein (HO)). Analysis of variance considering the effects of genetic group, days, and their interaction as well as linear and quadratic effect of the black globe humidity index (BGHI) was performed, as well as broken-line regression. These values were higher in pure HO than in ¾ and ½ groups. The average BGHI during the morning was 74, when 70, 43, and 13% of pure HO, ¾, and ½, respectively, presented RR above reference value. The RR was the best indicator of heat stress and its critical value was 116 breaths/min for ½, 140 for ¾, and 168 breaths/min for pure HO cows. In the HO group, physiological variables increased linearly with BGHI, without presenting inflection in the regression. The inflection point occurred at a higher BGHI for the ½ group compared with the other groups. Hematocrit and HEMO were different among genetic groups and did not vary with BGHI, showing that stress was not sufficient to alter these hematological parameters. The ½ HO group was capable of maintaining normal physiological parameters for at least 3 BGHI units above that of HO and 1 to 3 units higher than ¾ HO for RR and RT, respectively. Respiratory rate is the physiological parameter that best predicts heat stress in dairy cattle, and the 1/2 Holstein group is the best adapted to heat stress. MenosThe objective of this study was to investigate changes in physiological parameters of dairy cows and understand which physiological parameters show greater reliability for verification of heat stress. Blood samples were collected for analysis and included hematocrit (Ht), erythrocyte count (ERY), and hemoglobin count (HEMO). In addition, physiological variables, including rectal temperature (RT), heart rate (HR), respiratory rate (RR), and panting score (PS) were recorded in 38 lactating cows. These varied according to genetic group (½, ¾, and pure bred Holstein (HO)). Analysis of variance considering the effects of genetic group, days, and their interaction as well as linear and quadratic effect of the black globe humidity index (BGHI) was performed, as well as broken-line regression. These values were higher in pure HO than in ¾ and ½ groups. The average BGHI during the morning was 74, when 70, 43, and 13% of pure HO, ¾, and ½, respectively, presented RR above reference value. The RR was the best indicator of heat stress and its critical value was 116 breaths/min for ½, 140 for ¾, and 168 breaths/min for pure HO cows. In the HO group, physiological variables increased linearly with BGHI, without presenting inflection in the regression. The inflection point occurred at a higher BGHI for the ½ group compared with the other groups. Hematocrit and HEMO were different among genetic groups and did not vary with BGHI, showing that stress was not sufficient to alter these hematolo... Mostrar Tudo |
Palavras-Chave: |
Broken line; Critical values; Thermal comfort. |
Thesaurus NAL: |
Animal comfort; thermoregulation. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/151585/1/Cnpgl-2016-RevBrasZoot-Physiological.pdf
|
Marc: |
LEADER 02612naa a2200265 a 4500 001 2058404 005 2023-01-23 008 2016 bl uuuu u00u1 u #d 100 1 $aDALCIN, V. C. 245 $aPhysiological parameters for thermal stress in dairy cattle.$h[electronic resource] 260 $c2016 520 $aThe objective of this study was to investigate changes in physiological parameters of dairy cows and understand which physiological parameters show greater reliability for verification of heat stress. Blood samples were collected for analysis and included hematocrit (Ht), erythrocyte count (ERY), and hemoglobin count (HEMO). In addition, physiological variables, including rectal temperature (RT), heart rate (HR), respiratory rate (RR), and panting score (PS) were recorded in 38 lactating cows. These varied according to genetic group (½, ¾, and pure bred Holstein (HO)). Analysis of variance considering the effects of genetic group, days, and their interaction as well as linear and quadratic effect of the black globe humidity index (BGHI) was performed, as well as broken-line regression. These values were higher in pure HO than in ¾ and ½ groups. The average BGHI during the morning was 74, when 70, 43, and 13% of pure HO, ¾, and ½, respectively, presented RR above reference value. The RR was the best indicator of heat stress and its critical value was 116 breaths/min for ½, 140 for ¾, and 168 breaths/min for pure HO cows. In the HO group, physiological variables increased linearly with BGHI, without presenting inflection in the regression. The inflection point occurred at a higher BGHI for the ½ group compared with the other groups. Hematocrit and HEMO were different among genetic groups and did not vary with BGHI, showing that stress was not sufficient to alter these hematological parameters. The ½ HO group was capable of maintaining normal physiological parameters for at least 3 BGHI units above that of HO and 1 to 3 units higher than ¾ HO for RR and RT, respectively. Respiratory rate is the physiological parameter that best predicts heat stress in dairy cattle, and the 1/2 Holstein group is the best adapted to heat stress. 650 $aAnimal comfort 650 $athermoregulation 653 $aBroken line 653 $aCritical values 653 $aThermal comfort 700 1 $aFISCHER, V. 700 1 $aDALTRO, D. dos S. 700 1 $aALFONZO, E. P. M. 700 1 $aSTUMPF, M. T. 700 1 $aKOLLING, G. J. 700 1 $aSILVA, M. V. G. B. 700 1 $aMcMANUS, C. 773 $tRevista Brasileira de Zootecnia$gv. 45, n. 8, p. 458-465, 2016.
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