Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator
Hibernating arctic ground squirrels, Spermophilus parryii , were able to adopt and spontaneously arouse from core body temperatures as low as -2.9°C without freezing. Abdominal body temperatures of ground squirrels hibernating in outdoor burrows were recorded with temperature-sensitive radiotransmit...
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American Association for the Advancement of Science (AAAS)
1989
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Online Access: | http://dx.doi.org/10.1126/science.2740905 https://www.science.org/doi/pdf/10.1126/science.2740905 |
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craaas:10.1126/science.2740905 2024-06-23T07:49:45+00:00 Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator Barnes, Brian M. 1989 http://dx.doi.org/10.1126/science.2740905 https://www.science.org/doi/pdf/10.1126/science.2740905 en eng American Association for the Advancement of Science (AAAS) Science volume 244, issue 4912, page 1593-1595 ISSN 0036-8075 1095-9203 journal-article 1989 craaas https://doi.org/10.1126/science.2740905 2024-06-06T04:01:37Z Hibernating arctic ground squirrels, Spermophilus parryii , were able to adopt and spontaneously arouse from core body temperatures as low as -2.9°C without freezing. Abdominal body temperatures of ground squirrels hibernating in outdoor burrows were recorded with temperature-sensitive radiotransmitter implants. Body temperatures and soil temperatures at hibernaculum depth reached average minima during February of -1.9° and -6°C, respectively. Laboratory-housed ground squirrels hibernating in ambient temperatures of -4.3°C maintained above 0°C thoracic temperatures but decreased colonic temperatures to as low as -1.3°C. Plasma sampled from animals with below 0°C body temperatures had normal solute concentrations and showed no evidence of containing antifreeze molecules. Article in Journal/Newspaper Arctic AAAS Resource Center (American Association for the Advancement of Science) Arctic Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Science 244 4912 1593 1595 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Hibernating arctic ground squirrels, Spermophilus parryii , were able to adopt and spontaneously arouse from core body temperatures as low as -2.9°C without freezing. Abdominal body temperatures of ground squirrels hibernating in outdoor burrows were recorded with temperature-sensitive radiotransmitter implants. Body temperatures and soil temperatures at hibernaculum depth reached average minima during February of -1.9° and -6°C, respectively. Laboratory-housed ground squirrels hibernating in ambient temperatures of -4.3°C maintained above 0°C thoracic temperatures but decreased colonic temperatures to as low as -1.3°C. Plasma sampled from animals with below 0°C body temperatures had normal solute concentrations and showed no evidence of containing antifreeze molecules. |
format |
Article in Journal/Newspaper |
author |
Barnes, Brian M. |
spellingShingle |
Barnes, Brian M. Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator |
author_facet |
Barnes, Brian M. |
author_sort |
Barnes, Brian M. |
title |
Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator |
title_short |
Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator |
title_full |
Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator |
title_fullStr |
Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator |
title_full_unstemmed |
Freeze Avoidance in a Mammal: Body Temperatures Below 0°C in an Arctic Hibernator |
title_sort |
freeze avoidance in a mammal: body temperatures below 0°c in an arctic hibernator |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1989 |
url |
http://dx.doi.org/10.1126/science.2740905 https://www.science.org/doi/pdf/10.1126/science.2740905 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) |
geographic |
Arctic Burrows |
geographic_facet |
Arctic Burrows |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Science volume 244, issue 4912, page 1593-1595 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.2740905 |
container_title |
Science |
container_volume |
244 |
container_issue |
4912 |
container_start_page |
1593 |
op_container_end_page |
1595 |
_version_ |
1802640425924689920 |