Golubkov S.M., Tiunova T.M., Kocharina S.L.
В журнале Aquatic Insects
Год: 1992 Том: 14 Номер: 3 Страницы: 137-144
The relationships between respiration rate (RR) of rheophilous larvae of Cinygmula grandifolia Tshern. (Ephemeroptera), Stenopsyche marmorata Navas (Trichoptera) and Skwala pusilla (Klapalek) (Plecoptera) and oxygen concentration was examined in still and fast-flowing water. The flow did not imfluence these relationship for C. grandifolia, but did so for S. marmorata and S. pusilla. The Sensitivity of the species to oxygen depletion in still water was negatively correlated with the development of tracheal gills. The reduction of sensitivity to oxygen deficit caused by the stream flow was about 17% jf oxygen saturation (OS) for S. pusilla which has very small gills and about 20% for S. marmorata which have no tracheal gills. The distribution patterns of the species can be explained in terms of their RR-OS relationships to water flow. The larvae of S. marmorata and S. pusilla are usually observed only in sections of river with rapid current. The distribution patterns of some rheophilous insects attributed to different lines of adaptation for life in flowing water are discussed.
