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Effects of dehydration and rehydration on body temperatures in the black Bedouin goat
Year:
1998
Authors :
Ezra, David
;
.
Volume :
436
Co-Authors:
Jessen, C., Physiologisches Institut, Justus-Liebig-Univ. Giessen, Aulweg 129, D-35435 Giessen, Germany
Dmi'el, R., Department of Zoology, G.S. Wise Faculty of Life Sciences, Tel Aviv University, IL-69978 Ramat Aviv, Israel
Choshniak, I., Department of Zoology, G.S. Wise Faculty of Life Sciences, Tel Aviv University, IL-69978 Ramat Aviv, Israel
Ezra, D., Department of Zoology, G.S. Wise Faculty of Life Sciences, Tel Aviv University, IL-69978 Ramat Aviv, Israel
Kuhnen, G., Physiologisches Institut, Justus-Liebig-Univ. Giessen, Aulweg 129, D-35435 Giessen, Germany
Facilitators :
From page:
659
To page:
666
(
Total pages:
8
)
Abstract:
The temperatures of the arterial blood and the brain in black Bedouin goats were measured continuously by miniature data loggers. The animals were either euhydrated or dehydrated to 75-80% of the initial body mass by withholding water for 3-4 days during exposure to intense solar radiation. The daily blood temperature means and maxima of were significantly higher in dehydration than in euhydration, but 40°C was rarely exceeded even during the hot hours of the day. Selective brain cooling occurred in euhydration, but its extent was small when blood temperature was below 39.5°C. In dehydration, however, selective brain cooling was frequent and the standard response when blood temperature exceeded 39°C. We believe that selective brain cooling contributes to the inhibition of evaporative heat loss, which is the primary cause of the higher blood temperature in dehydration. Rapid rehydration with cold water induced long-lasting depression of blood temperature. No evidence was found for mechanisms attenuating the subsequent decrease of brain temperature which occurred a few minutes after the uptake of cold water.
Note:
Related Files :
animal experiment
Animals
body temperature
drinking
Goat
goats
sweating
water
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More details
DOI :
10.1007/s004240050686
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
27195
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:28
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Scientific Publication
Effects of dehydration and rehydration on body temperatures in the black Bedouin goat
436
Jessen, C., Physiologisches Institut, Justus-Liebig-Univ. Giessen, Aulweg 129, D-35435 Giessen, Germany
Dmi'el, R., Department of Zoology, G.S. Wise Faculty of Life Sciences, Tel Aviv University, IL-69978 Ramat Aviv, Israel
Choshniak, I., Department of Zoology, G.S. Wise Faculty of Life Sciences, Tel Aviv University, IL-69978 Ramat Aviv, Israel
Ezra, D., Department of Zoology, G.S. Wise Faculty of Life Sciences, Tel Aviv University, IL-69978 Ramat Aviv, Israel
Kuhnen, G., Physiologisches Institut, Justus-Liebig-Univ. Giessen, Aulweg 129, D-35435 Giessen, Germany
Effects of dehydration and rehydration on body temperatures in the black Bedouin goat
The temperatures of the arterial blood and the brain in black Bedouin goats were measured continuously by miniature data loggers. The animals were either euhydrated or dehydrated to 75-80% of the initial body mass by withholding water for 3-4 days during exposure to intense solar radiation. The daily blood temperature means and maxima of were significantly higher in dehydration than in euhydration, but 40°C was rarely exceeded even during the hot hours of the day. Selective brain cooling occurred in euhydration, but its extent was small when blood temperature was below 39.5°C. In dehydration, however, selective brain cooling was frequent and the standard response when blood temperature exceeded 39°C. We believe that selective brain cooling contributes to the inhibition of evaporative heat loss, which is the primary cause of the higher blood temperature in dehydration. Rapid rehydration with cold water induced long-lasting depression of blood temperature. No evidence was found for mechanisms attenuating the subsequent decrease of brain temperature which occurred a few minutes after the uptake of cold water.
Scientific Publication
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