Aspects of cold hardiness in Steganacarus magnus (Acari: Cryptostigmata) |
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Authors: | N. R. Webb W. Block |
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Affiliation: | (1) Furzebrook Research Station, NERC Institute of Terrestrial Ecology, BH20 5AS Wareham, Dorset, UK;(2) British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, CB3 0ET Cambridge, UK |
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Abstract: | Supercooling points and the presence of antifreeze compounds were measured for both nymphs and adults of Steganacarus magnus (Nicolet) collected from a coniferous forest soil in southern England in March, June and November. The mean supercooling point of nymphs was –14.4°C and of adults, –11.7°C. Acclimation to low temperatures (1–2°C) did not alter these values significantly. The total concentration of antifreeze compounds in the nymphs was 4.46 g mg-1 and in the adults 0.91 g mg-1. These results are compared with similar data for other species of cryptostigmatic mites. |
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