The Great Basin Naturalist, 1999, Vol. 59 (Classic Reprint)

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Excerpt from The Great Basin Naturalist, 1999, Vol. 59Season OF emergence.-muscle power output of insects is severely restricted at low temperatures (josephson 1981, Marden and Kramer Stoneflies are no exception. Even winter-emerging species are sluggish and rarely fly at temperatures near or below freezing (frison 1929, Marden and Kramer In addition, during periods of extreme cold, winter stoneflies seek shelter under rocks, bark, and leaves (frison 1929) and are unlikely to be engaged in dispersal activities. Therefore, we assumed species that emerge in colder months are less likely to successfully disperse. We scored species with September to March emergence as 1, species that emerge from April to June as 2, and those that emerge from July to August as 3.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.