烏帽子岳水系 (長野縣) の水棲昆虫並にその生産力について
1955 年 17 巻 1 号 p. 23-32
詳細
1955 年 17 巻 1 号 p. 23-32
1. This paper is a result of the survey which has been done in two torrents on Mt. Eboshi, Nagano Prefecture, in the years 1952-53, on the aquatic insect fauna and its productive potentials.
2. The productivity of the River Kakuma is greater than that of the River Kanabara when compared with each other at the same altitude.
3. The difference between two rivers under consideration seems to be caused by the qualitative structure of the rocks which constitute the substrata.
4. The productive potentials measured by dry weights of animals per unit area of the river bottom are graded as 6 : 2 : 2 : 1.5, concerning Trichoptera, Diptera, Tricladida, Ephemeroptera and Plecoptera.
