岐阜県根尾川金原発電所の発電害虫について

概要

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1. The water-tunnels, which conduct the water from the dam to the power plant, are very often inhabited by a number of the net-spinning caddis-fly larvae, the nets and cases of which resist the water flow, so that the efficiency of the power plant is reduced more or less, sometimes by 10 to 20 per cent. 2. Herein is reported the case of the Kinbara Water Power Plant, Gifu Prefecture, where we found 4 species of net-spinning caddis-larvae : Hydropsyche ulmeri, Hydropsyche nakaharai, Stenopsyche griseipennis and Parastenopsyche sauteri, the first two being the principal inhabitants. 3. Besides, in the tunnel were found such water insects as : Rhyacophila yamanakensis, Paragnetina tinctipennis, Ephemerella trispina, Ephemerella nigra, Epeorus latifolium, Epeorus curvatulus, Protohermes grandis and Antocha sp. 4. Hydropsyche-larvae are devoured by Paragnetina tinctipennis, Rhyacophila yamanakensis and Prothohermes grandis. 5. The food relations in the community are shown in fig. 4. 6. In this tunnel the Hydropsyche cases were made mostly of plant fragments (fragments of leaves, stalks, halms, tendrils etc.). It is advisable not to let these fragments flow into the tunnel. 7. The most promising way to prevent the attaching of the Hydropsyche larvae to the tunnel wall is to apply paints containing some insecticides.
日本生態学会の論文
1955-10-31