Hatchling snapping turtles overwintering in natural nests are inoculated by ice in frozen soil
1. 1.Hatchling snapping turtles ( Chelydra serpentina) that were placed on platforms of dry styrofoam survived for 7 h without freezing at temperatures below −4°C. 2. 2.Turtles that were confined to artificial nests in frozen soil were unable to withstand exposure to temperatures much lower than −2°...
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Veröffentlicht in: | Journal of thermal biology 1993, Vol.18 (4), p.185-188 |
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Sprache: | eng |
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Zusammenfassung: | 1.
1.Hatchling snapping turtles (
Chelydra serpentina) that were placed on platforms of dry styrofoam survived for 7 h without freezing at temperatures below −4°C.
2.
2.Turtles that were confined to artificial nests in frozen soil were unable to withstand exposure to temperatures much lower than −2°C.
3.
3.Animals that were held in dry surroundings and then cooled to −2°C froze rapidly when they were brought into contact with crystals of ice.
4.
4.These observations indicate that turtles which die from cold exposure when they are forced to overwinter in nests in the field probably succumb to inoculative freezing caused by contact with ice in the soil and not to spontaneous nucleation caused by body fluids reaching their limit of supercooling. |
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ISSN: | 0306-4565 1879-0992 |
DOI: | 10.1016/0306-4565(93)90001-A |