琵琶湖の音環境および工事音の魚類に対する影響

概要

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In order to clarify the effects of construction sound to fish populations, the change of acoustic environments of Lake Biwa by dredging was observed. Also, the response of fish to dredging sound and swimming direction of fish near the worksite was studied by the use of acustic biotelemetry. Results obtained are sumarized as follows: 1) The spectrum level of the back ground noise of lake Biwa was within the limits of prevailing noise of the sea. 2) Pressure level of the underwater sound of a dredging boat at a distance of 150m was about 38dB, and that of a submerged pipe at a distance of 2m was 75dB. 3) The fish showed negative responses and was considered to avoid the avoustic field of worksite.
公益社団法人日本水産学会の論文