Abstract
Summary Cold hardiness of the prostigmatid mite Stereotydeus mollis from Ross Island, Antarctica was investigated, and two years of microclimate temperatures recorded. There was no correlation between supercooling points and several microclimate parameters. Supercooling points changed significantly during the course of two summers, with highest median SCPs near the end of both summers. Osmolality was similar to what has been found in other Antarctic mites, however no thermal hysteresis activity was detectable in haemolymph samples. Preliminary investigations revealed that the main carbohydrates in the mite were glucose, trehalose and myo-inositol, with trace amounts of glycerol.
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