Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes
Three species of free-living Antarctic fellfield nematodes, Eudorylaimus coniceps, E. spaulli and E. pseudocarteri exhibited differing degrees of both strategies of cold-hardiness; freeze-tolerance and freeze-avoidance. Bimodal distributions of supercooling points were obtained from monthly field sa...
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ftnerc:oai:nora.nerc.ac.uk:520740 2023-05-15T13:49:35+02:00 Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes Pickup, Jonathan 1990-06 http://nora.nerc.ac.uk/id/eprint/520740/ https://doi.org/10.1007/BF00300949 unknown Springer Pickup, Jonathan. 1990 Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes. Journal of Comparative Physiology B, 160 (2). 167-173. https://doi.org/10.1007/BF00300949 <https://doi.org/10.1007/BF00300949> Publication - Article PeerReviewed 1990 ftnerc https://doi.org/10.1007/BF00300949 2023-02-04T19:46:55Z Three species of free-living Antarctic fellfield nematodes, Eudorylaimus coniceps, E. spaulli and E. pseudocarteri exhibited differing degrees of both strategies of cold-hardiness; freeze-tolerance and freeze-avoidance. Bimodal distributions of supercooling points were obtained from monthly field samples of both E. coniceps and E. spaulli. Individuals found in the low group of this distribution (supercooling to <-15 °C) were capable of avoiding freezing by extensive supercoolint (to a mean temperature of ca-22 °C), sufficient to with-stand the environmental extremes of the maritime Antarctic. The high groups of both these species, and almost all E. pseudocarteri, were likely to have frozen at some stage during winter. Survival of freezing increased with the temperature at which nucleation occurred, and has been described by a Gompertz model. Estimates of the supercooling points at which survival fell to 50% were-10.4,-7.1 and-6.1 °C for E. coniceps, E. pseudocarteri and E. spaulli, respectively. Article in Journal/Newspaper Antarc* Antarctic Natural Environment Research Council: NERC Open Research Archive Antarctic Journal of Comparative Physiology B 160 2 167 173 |
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Natural Environment Research Council: NERC Open Research Archive |
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description |
Three species of free-living Antarctic fellfield nematodes, Eudorylaimus coniceps, E. spaulli and E. pseudocarteri exhibited differing degrees of both strategies of cold-hardiness; freeze-tolerance and freeze-avoidance. Bimodal distributions of supercooling points were obtained from monthly field samples of both E. coniceps and E. spaulli. Individuals found in the low group of this distribution (supercooling to <-15 °C) were capable of avoiding freezing by extensive supercoolint (to a mean temperature of ca-22 °C), sufficient to with-stand the environmental extremes of the maritime Antarctic. The high groups of both these species, and almost all E. pseudocarteri, were likely to have frozen at some stage during winter. Survival of freezing increased with the temperature at which nucleation occurred, and has been described by a Gompertz model. Estimates of the supercooling points at which survival fell to 50% were-10.4,-7.1 and-6.1 °C for E. coniceps, E. pseudocarteri and E. spaulli, respectively. |
format |
Article in Journal/Newspaper |
author |
Pickup, Jonathan |
spellingShingle |
Pickup, Jonathan Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes |
author_facet |
Pickup, Jonathan |
author_sort |
Pickup, Jonathan |
title |
Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes |
title_short |
Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes |
title_full |
Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes |
title_fullStr |
Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes |
title_full_unstemmed |
Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes |
title_sort |
strategies of cold-hardiness in three species of antarctic dorylaimid nematodes |
publisher |
Springer |
publishDate |
1990 |
url |
http://nora.nerc.ac.uk/id/eprint/520740/ https://doi.org/10.1007/BF00300949 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Pickup, Jonathan. 1990 Strategies of cold-hardiness in three species of Antarctic dorylaimid nematodes. Journal of Comparative Physiology B, 160 (2). 167-173. https://doi.org/10.1007/BF00300949 <https://doi.org/10.1007/BF00300949> |
op_doi |
https://doi.org/10.1007/BF00300949 |
container_title |
Journal of Comparative Physiology B |
container_volume |
160 |
container_issue |
2 |
container_start_page |
167 |
op_container_end_page |
173 |
_version_ |
1766251802405109760 |