矢田川水系(兵庫県)の水生動物群集II全全水系における底生昆虫の分布

概要

論文の詳細を見る
1. In this paper, the author shows the results of a faunistic survey on stream bed animals in the Yada River System of Hyogo Prefecture. The field study was made during 1956 to 1959 and more than 81 species belonging to eight orders of insects were collected. 2. Whole River System was divided into four parts viz. spring, torrential parts, mid-stream, and lower part. The numbers of species of insects found in each part were shown in the order as 51,49,36 and 8. By the quantitative survey on standing crops of each parts, the torrential part and mid-stream has the largest standing crops than the others. The two species of netspinning caddisfly larvae belonging to Stenopsychidae were dominant in these parts. 3. The size distribution of Stenopsychidlarvae was examined at several stations. In the summer season, the body size of Stenopsyche griseipennis larvae was larger than that of Parastenopsyche sauteri in mid-stream but the body sizes of both species were similar in the torrential part. These facts seems to suggest the interesting and impertant problem of population dynamics in stream bed community.
日本生態学会の論文
1960-12-01