Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island
Oxygen uptake of Paractora dreuxi (apterous) from Marion Island, which lies to the north of the Antarctic Polar Front, was compared to that of P. trichosterna (macropterous) and Antrops truncipennis (apterous) from South Georgia, which lies within the Antarctic Polar Front, over the range of tempera...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/508607/ https://doi.org/10.1007/s003000050108 |
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ftnerc:oai:nora.nerc.ac.uk:508607 2023-05-15T13:48:08+02:00 Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island Chown, S. L. 1997 http://nora.nerc.ac.uk/id/eprint/508607/ https://doi.org/10.1007/s003000050108 unknown Springer Chown, S. L. 1997 Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island. Polar Biology, 17 (1). 81-86. https://doi.org/10.1007/s003000050108 <https://doi.org/10.1007/s003000050108> Publication - Article PeerReviewed 1997 ftnerc https://doi.org/10.1007/s003000050108 2023-02-04T19:40:24Z Oxygen uptake of Paractora dreuxi (apterous) from Marion Island, which lies to the north of the Antarctic Polar Front, was compared to that of P. trichosterna (macropterous) and Antrops truncipennis (apterous) from South Georgia, which lies within the Antarctic Polar Front, over the range of temperatures experienced by these insects in their microhabitats. No differences in the slopes of log metabolic rate on temperature were found between the larvae of the two Paractora species, but the slope of the regression of log metabolic rate on temperature was steeper in the adults of P. trichosterna than in those of P. dreuxi. Therefore, metabolic cold adaptation was not found in P. trichosterna compared to P. dreuxi. However, some evidence for temperature compensation in A. truncipennis was found, although this could not be considered an adaptation. The difference in the thermal sensitivity of metabolic rate of the adults of the Paractora species is ascribed to differences in their life history strategies. Paractora trichosterna is a winged species in which retention of a thermal sensitivity similar to that of its larvae may facilitate resource location and so enhance fitness. On the other hand, the loss of flight in P. dreuxi may have allowed a reduction in thermal sensitivity that could mean a reduction in respiratory water loss at higher temperatures. Article in Journal/Newspaper Antarc* Antarctic Marion Island Polar Biology Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Polar Biology 17 1 81 86 |
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Natural Environment Research Council: NERC Open Research Archive |
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Oxygen uptake of Paractora dreuxi (apterous) from Marion Island, which lies to the north of the Antarctic Polar Front, was compared to that of P. trichosterna (macropterous) and Antrops truncipennis (apterous) from South Georgia, which lies within the Antarctic Polar Front, over the range of temperatures experienced by these insects in their microhabitats. No differences in the slopes of log metabolic rate on temperature were found between the larvae of the two Paractora species, but the slope of the regression of log metabolic rate on temperature was steeper in the adults of P. trichosterna than in those of P. dreuxi. Therefore, metabolic cold adaptation was not found in P. trichosterna compared to P. dreuxi. However, some evidence for temperature compensation in A. truncipennis was found, although this could not be considered an adaptation. The difference in the thermal sensitivity of metabolic rate of the adults of the Paractora species is ascribed to differences in their life history strategies. Paractora trichosterna is a winged species in which retention of a thermal sensitivity similar to that of its larvae may facilitate resource location and so enhance fitness. On the other hand, the loss of flight in P. dreuxi may have allowed a reduction in thermal sensitivity that could mean a reduction in respiratory water loss at higher temperatures. |
format |
Article in Journal/Newspaper |
author |
Chown, S. L. |
spellingShingle |
Chown, S. L. Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island |
author_facet |
Chown, S. L. |
author_sort |
Chown, S. L. |
title |
Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island |
title_short |
Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island |
title_full |
Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island |
title_fullStr |
Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island |
title_full_unstemmed |
Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island |
title_sort |
thermal sensitivity of oxygen uptake of diptera from sub-antarctic south georgia and marion island |
publisher |
Springer |
publishDate |
1997 |
url |
http://nora.nerc.ac.uk/id/eprint/508607/ https://doi.org/10.1007/s003000050108 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Marion Island Polar Biology |
genre_facet |
Antarc* Antarctic Marion Island Polar Biology |
op_relation |
Chown, S. L. 1997 Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island. Polar Biology, 17 (1). 81-86. https://doi.org/10.1007/s003000050108 <https://doi.org/10.1007/s003000050108> |
op_doi |
https://doi.org/10.1007/s003000050108 |
container_title |
Polar Biology |
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17 |
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1 |
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81 |
op_container_end_page |
86 |
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1766248779463262208 |