半水棲昆虫における表面張力による水際部移動について

概要

論文の詳細を見る
Minute semi-aquatic insects dwelling on water surface are generally not able to ascend the curved surface along the edge of water by means of walking or running. This difficult destination can only be attained if the insects raise the surface film by special pose and action and utilize the surface tension so produced. The present observations and experiments were carried out under a binocular microscope. The insects were kept in a vial of about 3 cm in diameter with water. However minute they may be, the prominences and depressions of water surface caused by the legs or any other parts of insects could be readily discriminated under spotlight illumination, as prominences projected a light spot on the shadow, while depressions a dark spot. Four types of methods in raising surface film were recognized. A. Raising surface film by adhesive organ in Collembola (Podura). B. By posing characteristic attitude in Heteroptera (Hebrus, Mesovelia, Hydrometra, Microvelia, etc.). C. Floating the body on water surface on either side and pulling up surface film by parts of the body in Hydrometra procera. D. Raising surface film at some parts of the body by swimming to water-side, in Coleoptera and others (Stenus, Bembidion, Pristomyrmex, etc.).
日本昆虫学会の論文
1955-05-20