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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
08/05/2023 |
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Autoria: |
OLSSON, K.; DAHLBORN, K. |
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Título: |
Fluid balance during heat stress in lactating goats. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Quarterly Journal Experimental Physiology, v. 74, n. 5, p. 645-659, Sep. 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Fluid balance and thermoregulation were studied during an acute heat load (maximal daily temperature, 38 +/- 1 degrees C; night temperature 27 +/- 1 degrees C) in six goats during lactation and non-lactation. The goats had free access to water for 1 day, followed by 29.5 h of water deprivation and then water was returned. With water available the goats increased water intake and urinary and milk water losses, while plasma and milk osmolality decreased. Water deprivation caused plasma osmolality and vasopressin concentration to increase most in lactating goats. Milk osmolality rose to values similar to plasma osmolality. Plasma cortisol increased in lactating goats at the end of dehydration. Renal Na+ excretion increased during dehydration in lactating goats. Evaporative heat loss was larger in lactating goats when hydrated, but became less than in non-lactating goats during dehydration. Lactating goats exhibited higher respiratory frequency and rectal temperature than non-lactating goats. In conclusion, our results show that goats increase the water turnover during heat stress if allowed to drink ad libitum, but when they are deprived of water lactating goats reduce water loss in urine, milk and by evaporation, and rectal temperature reaches higher levels than in non-lactating animals. This saving of water could allow milk production to be maintained for a longer time during heat stress. |
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Palavras-Chave: |
Bioquimica serica. |
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Thesagro: |
Bioclimatologia; Calor; Caprino; Stress. |
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Thesaurus Nal: |
Bioclimatology; Goats; Heat stress; Thermoregulation. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02072naa a2200241 a 4500
001 1521648
005 2023-05-08
008 1989 bl uuuu u00u1 u #d
100 1 $aOLSSON, K.
245 $aFluid balance during heat stress in lactating goats.$h[electronic resource]
260 $c1989
520 $aAbstract: Fluid balance and thermoregulation were studied during an acute heat load (maximal daily temperature, 38 +/- 1 degrees C; night temperature 27 +/- 1 degrees C) in six goats during lactation and non-lactation. The goats had free access to water for 1 day, followed by 29.5 h of water deprivation and then water was returned. With water available the goats increased water intake and urinary and milk water losses, while plasma and milk osmolality decreased. Water deprivation caused plasma osmolality and vasopressin concentration to increase most in lactating goats. Milk osmolality rose to values similar to plasma osmolality. Plasma cortisol increased in lactating goats at the end of dehydration. Renal Na+ excretion increased during dehydration in lactating goats. Evaporative heat loss was larger in lactating goats when hydrated, but became less than in non-lactating goats during dehydration. Lactating goats exhibited higher respiratory frequency and rectal temperature than non-lactating goats. In conclusion, our results show that goats increase the water turnover during heat stress if allowed to drink ad libitum, but when they are deprived of water lactating goats reduce water loss in urine, milk and by evaporation, and rectal temperature reaches higher levels than in non-lactating animals. This saving of water could allow milk production to be maintained for a longer time during heat stress.
650 $aBioclimatology
650 $aGoats
650 $aHeat stress
650 $aThermoregulation
650 $aBioclimatologia
650 $aCalor
650 $aCaprino
650 $aStress
653 $aBioquimica serica
700 1 $aDAHLBORN, K.
773 $tQuarterly Journal Experimental Physiology$gv. 74, n. 5, p. 645-659, Sep. 1989.
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| Registros recuperados : 3 | |
| 1. |  | ZART, M.; DENARDI, D.; SANTOS, H. P. dos; SOUZA, D. A.; SOUSA, P. V. D. de; BOTTON, M.; NONDILLO, A. Teores nutricionais em folhas de videira infestadas e não infestadas por pérola-da-terra em condições controladas de cultivo. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 9.; ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 5., 2011, Bento Gonçalves. Resumos... Bento Gonçalves: Embrapa Uva e Vinho, 2011. p. 16. Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 2. | | ZART, M.; DENARDI, D.; SANTOS, H. P. dos; SOUZA, D. A.; SOUSA, P. V. D.; BOTTON, M.; NONDILLO, A. Influência da pérola-da-terra sobre os sintomas de clorose e acúmulo de amido em folhas de videira em cultivo controlado. Brazilian Journal of Plant Physiology, Londrina, v. 23, p. 270, set. 2011. 270 Suplemento. Resumo apresentado no XIII CONGRESSO BRASILEIRO DE FISIOLOGIA VEGETAL e XIV REUNIÃO LATINO-AMERICANA DE FISIOLOGIA VEGETAL, de 19 a 22 de setembro 2011, Búzios, RJ.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 3. | | DENARDI, D.; ZART, M.; SANTOS, H. P. dos; SOUZA, D. A.; SOUSA, P. V. D. de; BOTTON, M. Avaliação de estacas para produção de mudas a partir de videiras infestadas e não infestadas por pérola-da-terra. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 9.; ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 5., 2011, Bento Gonçalves. Resumos... Bento Gonçalves: Embrapa Uva e Vinho, 2011. p. 28. Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| Registros recuperados : 3 | |
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