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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: |
12/02/1996 |
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Data da última atualização: |
08/11/2023 |
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Autoria: |
MACFARLANE, W. V.; MORRIS, R. J. H.; HOWARD, B.; McDONALD, J.; BUDTZ-OLSENT, O.E. |
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Título: |
Water and electrolyte changes in tropical Merino sheep exposed to dehydration during summer. |
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Ano de publicação: |
1961 |
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Fonte/Imprenta: |
Australian Journal Agricultural Research, v. 12, n. 5, p. 889-912, 1961. |
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DOI: |
10.1071/AR9610889 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: During three summers field studies were made of Merino wethers deprived of water while exposed to sun and to maximum air temperatures ranging from 84°F (29°C) to 10S°F (42°C) at Julia Creek, lat. 21° S. Evaporative cooling determined the rate and extent of water and electrolyte changes and produced a different pattern each year. Control of body temperature failed when 31% of body weight was lost by the end of 10 days without water. In hotter weather 5 days without water caused a 25% loss of body weight and in some sheep irreversible circulatory failure. In the course of dehydration, after an initial increase, the plasma and extracellular volume decreased up to 45% while concentrations of haemoglobin and plasma protein increased by 60%. In the plasma, potassium and sodium concentration increased less than that of haemoglobin. When 25% or more of weight was lost, plasma urea concentration rose to 136 mg/100 ml. Plasma osmolarity in some sheep reached 490 m-osmoles/l after 10 days. Urine volume fell after 2 days without water, and in a hot season less than 100 ml/24 hr was passed on the fourth or subsequent days. Concentrations increased over the first 4 or 5 days, reaching a maximum of 3.8 osmoles/l, then declined. Between half and two-thirds of the osmolarity was accountable to sodium and potassium salts. In rapid dehydration, more sodium was excreted than potassium. There was reduced sodium excretion when water was ingested after dehydration. Renal function studies in ewes indicated that filtration, renal plasma flow, and glucose reabsorption were reduced to half after 5 days without water in the heat. The chance of survival in dehydration appears to be increased by low rates of water loss in the first 3 days, together with high sodium and low potassium excretion. A full rumen, containing water up to 13% of body weight, could provide all the extracellular fluid loss. More than half of the weight loss appears, however, to come from intracellular sources. Extracellular fluid was drawn upon to a greater extent when the rate of dehydration was rapid, than in the cooler periods of slow weight loss. Survival in the sun without water depends upon insulation, water conservation, water reserves in rumen and extracellular fluid, the ability to adjust electrolyte concentrations, and the ability to maintain circulation with lowered plasma volume. MenosAbstract: During three summers field studies were made of Merino wethers deprived of water while exposed to sun and to maximum air temperatures ranging from 84°F (29°C) to 10S°F (42°C) at Julia Creek, lat. 21° S. Evaporative cooling determined the rate and extent of water and electrolyte changes and produced a different pattern each year. Control of body temperature failed when 31% of body weight was lost by the end of 10 days without water. In hotter weather 5 days without water caused a 25% loss of body weight and in some sheep irreversible circulatory failure. In the course of dehydration, after an initial increase, the plasma and extracellular volume decreased up to 45% while concentrations of haemoglobin and plasma protein increased by 60%. In the plasma, potassium and sodium concentration increased less than that of haemoglobin. When 25% or more of weight was lost, plasma urea concentration rose to 136 mg/100 ml. Plasma osmolarity in some sheep reached 490 m-osmoles/l after 10 days. Urine volume fell after 2 days without water, and in a hot season less than 100 ml/24 hr was passed on the fourth or subsequent days. Concentrations increased over the first 4 or 5 days, reaching a maximum of 3.8 osmoles/l, then declined. Between half and two-thirds of the osmolarity was accountable to sodium and potassium salts. In rapid dehydration, more sodium was excreted than potassium. There was reduced sodium excretion when water was ingested after dehydration. Renal function studies... Mostrar Tudo |
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Palavras-Chave: |
Laboratorio quimico. |
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Thesagro: |
Água; Desidratação; Eletrólito; Hematologia; Ovino. |
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Thesaurus Nal: |
Dehydration (animal physiology); Electrolytes; Hematology; Sheep; Water deprivation. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03296naa a2200313 a 4500
001 1519840
005 2023-11-08
008 1961 bl uuuu u00u1 u #d
024 7 $a10.1071/AR9610889$2DOI
100 1 $aMACFARLANE, W. V.
245 $aWater and electrolyte changes in tropical Merino sheep exposed to dehydration during summer.$h[electronic resource]
260 $c1961
520 $aAbstract: During three summers field studies were made of Merino wethers deprived of water while exposed to sun and to maximum air temperatures ranging from 84°F (29°C) to 10S°F (42°C) at Julia Creek, lat. 21° S. Evaporative cooling determined the rate and extent of water and electrolyte changes and produced a different pattern each year. Control of body temperature failed when 31% of body weight was lost by the end of 10 days without water. In hotter weather 5 days without water caused a 25% loss of body weight and in some sheep irreversible circulatory failure. In the course of dehydration, after an initial increase, the plasma and extracellular volume decreased up to 45% while concentrations of haemoglobin and plasma protein increased by 60%. In the plasma, potassium and sodium concentration increased less than that of haemoglobin. When 25% or more of weight was lost, plasma urea concentration rose to 136 mg/100 ml. Plasma osmolarity in some sheep reached 490 m-osmoles/l after 10 days. Urine volume fell after 2 days without water, and in a hot season less than 100 ml/24 hr was passed on the fourth or subsequent days. Concentrations increased over the first 4 or 5 days, reaching a maximum of 3.8 osmoles/l, then declined. Between half and two-thirds of the osmolarity was accountable to sodium and potassium salts. In rapid dehydration, more sodium was excreted than potassium. There was reduced sodium excretion when water was ingested after dehydration. Renal function studies in ewes indicated that filtration, renal plasma flow, and glucose reabsorption were reduced to half after 5 days without water in the heat. The chance of survival in dehydration appears to be increased by low rates of water loss in the first 3 days, together with high sodium and low potassium excretion. A full rumen, containing water up to 13% of body weight, could provide all the extracellular fluid loss. More than half of the weight loss appears, however, to come from intracellular sources. Extracellular fluid was drawn upon to a greater extent when the rate of dehydration was rapid, than in the cooler periods of slow weight loss. Survival in the sun without water depends upon insulation, water conservation, water reserves in rumen and extracellular fluid, the ability to adjust electrolyte concentrations, and the ability to maintain circulation with lowered plasma volume.
650 $aDehydration (animal physiology)
650 $aElectrolytes
650 $aHematology
650 $aSheep
650 $aWater deprivation
650 $aÁgua
650 $aDesidratação
650 $aEletrólito
650 $aHematologia
650 $aOvino
653 $aLaboratorio quimico
700 1 $aMORRIS, R. J. H.
700 1 $aHOWARD, B.
700 1 $aMcDONALD, J.
700 1 $aBUDTZ-OLSENT, O.E.
773 $tAustralian Journal Agricultural Research$gv. 12, n. 5, p. 889-912, 1961.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 24 | |
| 1. |  | AGOSTINI COSTA, T. S.; SILVA, D. B. da. Jambolão: a cor da saúde. In: DINIZ, M. F.; OLIVEIRA, L G. de (Org). Artigos técnicos divulgados na mídia: coletânea 2008. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. 1 CD-ROM. (Embrapa Recursos Genéticos e Biotecnologia. Documentos, 278). Publicado em 04/01/2008. Disponível em: Toda Fruta, todafruta0401; Natural Rural, naturalrural1801; Infobibos, infobibos1801; Boletim Pecuário, boletimpecuario0401; Clicnews, clicnews1801; Hotel Virtual, hotelvirtual1801; Agrosoft,...| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 4. | | FARIA, J. P.; VIEIRA, R. F.; LIMA, L. H. C.; AGOSTINI-COSTA, T. S. Determinação de carotenóides em coquinho (Butia capitata). In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 11., 2006, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2006. p. 181.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 5. | | WONDRACEK, D. C.; FALEIRO, F. G.; VIEIRA, R. F.; AGOSTINI COSTA, T. S. Diversidade genética de maracujás-do-cerrado com base no perfil de carotenóides. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. Resumo 134. p. 183.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 6. | | LOPES, R. M.; FALEIRO, F. G.; VIEIRA, R. F.; AGOSTINI COSTA, T. S. Diversidade genética de acessos de maracujás do cerrado com base no perfil de ácidos graxos presentes no óleo das sementes. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. Resumo 133. p.183.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 9. | | WONDRACEK, D. C.; SEVILHA, A. C.; VIEIRA, R. F.; FALEIRO, F. G.; AGOSTINI-COSTA, T. S. Identificação de carotenóides em maracujá-do-cerrado (Passiflora setacea). In : ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 12., 2007, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2007. p. 178.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 13. | | BRAGA, M. F.; JUNQUEIRA, N. T. V.; FALEIRO, F. G.; AGOSTINI-COSTA, T. S.; BERNACCI, L. C. Maracujá-do-Cerrado. In: VIEIRA, R. F.; AGOSTINI-COSTA, T. da S.; SILVA, D. B. da; FERREIRA, F. R.; SANO, S. M. (Ed.). Frutas nativas da região centro-oeste do Brasil. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2006. cap. 13, p. 216-233.| Tipo: Capítulo em Livro Técnico-Científico | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Cerrados. |
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| 15. | | FARIA, J. P.; SIQUEIRA, E. M. A.; GRIMALDI, R.; BARRERA-ARELLANO, D.; VIEIRA, R. F.; AGOSTINI-COSTA, T. S. Caracterização do óleo do coquinho (Butia capitata). In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 11., 2006, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2006. p. 175.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 16. | | LOPES, R. M.; VIEIRA, R. F.; SILVA, D. B.; SEVILHA, A.; FALEIRO, F. G.; AGOSTINI COSTA, T. S. Caracterização do óleo da semente de espécies nativas do cerrado brasileiro: Passiflora cincinnata Mast, Passiflora setacea D.C, Passiflora mitida HBK e Hancornia speciosa Gomes. In: SIMPÓSIO DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA Y EL CARIBE, SIRGEALC, 6., 2007, Chapingo, México. Por la valoración de los recursos genéticos para el desarrollo sustentable en América Latina y el Caribe: memoria. Chapingo: Universidad Autónoma Chapingo, 2007. p. 77.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 17. | | LOPES, R. M.; SEVILHA, A. C.; SILVA, D. B.; VIEIRA, R. F.; FALEIRO, F. G.; AGOSTINI-COSTA, T. S. Caracterização do óleo da semente de espécies nativas do cerrado brasileiro: Passiflora cincinnata Mast, Passiflora setacea D.C, Passiflora nitida HBK e Hancornia speciosa Gomes. In : ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 12., 2007, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2007. p. 163.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 18. | | LOPES, R. M.; VIEIRA, R. F.; SILVA, D. B.; SEVILHA, A.; FALEIRO, F. G.; AGOSTINI-COSTA, T. S. Caracterização do óleo da semente de espécies nativas do cerrado brasileiro: Passiflora cincinnata Mast, Passiflora setacea D. C., Passiflora nitida HBK e Hancornia speciosa Gomes. In: SIMPOSIO DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA Y EL CARIBE, SIRGEALC, 6., 2007, Chapingo, Mexico. Por la valoracion de los recursos genéticos para el desarrollo sustentable en América Latina y el Caribe: memoria. Chapingo: Universidad Autónoma Chapingo, 2007. p. 69.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Cerrados. |
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| 19. | | FARIA, J. P.; SIQUEIRA, E. M. A.; ALMEIDA, F.; SILVA, L. C. R.; VIEIRA, R. F.; AGOSTINI-COSTA, T. S. Determinação de minerais e teor de fibra da polpa e da semente do coquinho (Butia capitata). In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 11., 2006, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2006. p. 182.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| Registros recuperados : 24 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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