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Polar Biology

, Volume 15, Issue 3, pp 221–224 | Cite as

Cold tolerance in Tardigrada from Dronning Maud Land, Antarctica

  • Lauritz Sømme
  • Terje Meier
Original Paper

Abstract

Survival at low temperatures was studied in three species of Tardigrada from Müihlig-Hofmannfjella, Dronning Maud Land, Antarctica. Both hydrated and dehydrated specimens of Echiniscus jenningsi, Macrobiotus furciger and Diphascon chilenense had high survival rates following exposure to -22°C for ca. 600 days, and dehydrated specimens following 3040 days at this temperature. In hydrated E. jenningsi, mortality increased with the duration of exposure from 7 to 150 days at -80°C, while mortalities of the two other species did not change. Hydrated specimens of all species were rapidly killed at -180°C, but all species exhibited good survivorship in the dehydrated state after 14 days at -180°C. In conclusion, hydrated tardigrades are able to survive extended periods at low temperatures, and dehydrated specimens are even better adapted to survive overwintering on Antarctic nunataks.

Keywords

Hydrated Survival Rate Extended Period Good Survivorship High Survival 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • Lauritz Sømme
    • 1
  • Terje Meier
    • 1
  1. 1.Department of BiologyUniversity of OsloOsloNorway

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