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伊万里湾福島北東部の真珠養殖漁場の汚染について


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Title: 伊万里湾福島北東部の真珠養殖漁場の汚染について
Other Titles: Contamination of Pearl Farm in Imari Bay
Authors: 飯塚, 昭二 / 藤田, 雄二 / 銭谷, 武平 / 入江, 春彦
Authors (alternative): Iizuka, Shoji / Fujita, Yuji / Zenitani, Buhei / Irie, Haruhiko
Issue Date: Aug-1968
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.25, pp.67-78; 1968
Abstract: The present paper deals with the contamination caused by the pigsty sewage in the northeastern waters of Fukushima I. in Imari Bay in northwestern Kyushu. The sewage consists of excrements, remainder of pig-foods and a large amount of water used for washing of the pigsties. The solid matters in the sewage are deposited soon after being brought to the sea and directly and strongly contaminate the bottom of the surrounding sea. In the area that extends 20 to 25 meters in distance from the drainage, anaerobic decomposition proceeds vigorously with nasty smell and there exist no benthos. The particles left over from deposition and the dissolved matters in the sewage run off along with the movements of the surface water and contaminate a larger area indirectly. It was shown from the results of the current surveys by current-drags and "sea-markers" that the surface water in the area concerned moves counterclockwise and run off mostly along the coast II (cf. Fig. 1). Therefore, it is anticipated that the sewage also take the same course as the "sea-markers" shown in Fig. 6 and attain to the area B passing the area A. The propriety of such anticipation was confirmed by the microbial surveys which showed a tendency that the coliform bacteria accumulate temporarily at station 4 (cf. Table 2). The area C where many pearl rafts are set up, is not contaminated yet and it is considered that this is due to the zostera-zone which has flourished on the boundary between the areas A and C and which probably plays the role of barrier to keep the area from contamination.
URI: http://hdl.handle.net/10069/31350
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第25号

Citable URI : http://hdl.handle.net/10069/31350

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