The Alaskan stonefly (Nemoura arctica), is a freeze-tolerant aquatic insect able to survive over 2 weeks at − 15 °C. Walters et al. (2009), observed that the main metabolite produced by the stonefly was glycerol, with a three-fold increase, but they also identified the production of...
Three species, Nemoura arctica, N. sahlbergi and N. viki, are restricted to the north. Three other species occur throughout much of Fennoscandia, while in the south there are four and in the costal areas in the west only a single species. Nymphs of the seven species of Nemoura ...
Field studies of Nemoura arctica and N. viki showed that the two species preferred different biotopes and indicated differences in their life‐cycles. N. arctica seemed to have a semivoltine life‐cycle, at least in some years, this was not the case for N. viki.\nAlbert...