Oil pollution in the Izu Islands waters |
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Authors: | Masamichi Ohya Tomohiro Otsuki Moriyoshi Saito |
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Affiliation: | 1. Oshima Branch of the Tokyo Metropolitan Fishery Experiment Station, Habuko, Oshima, 100-02, Tokyo, Japan 2. 3-34-1 Department of Fisheries, Nihon University, Setagaya-ku, 154, Tokyo, Japan
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Abstract: | The oil pollution in the Izu Islands waters are observed as follows: - Globules and lumps of oil were collected 2.56 g on the average in wet weight by each taw(174 m3) of a larval net at 389 stations, up to the maximum collection of more than 500 g.
- On the investigation of the Oshima—Torishima line (J1–J10), globules and lumps of oil were collected more at the south of the Kuroshio Current than at the north.
- In the coastal region (T1–T19) of Japan, many globules and lumps of oil were collected when a cold water mass was located at the west side of the Izu Islands, from south to east side of where the Kuroshio Current took a roundabout and closed near to the Bōsō peninsula (Aug. 1971, Jun. 1972, Aug. 1972), or when the Kuroshio Current took a roundabout the cold water mass which extended as far as Oshima from the coast of the Bōsō peninsula (Sept. 1971).
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