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東支那海におけるマナガツオについてI : 男女群島南西海域における海況と漁況 On the White Pomfret of the East China Sea I : Relation between the oceanographical condition and distribution of the white pomfret in the south-west region of the Danzyo Islands 1000010041708 東川, 勢二 HIGASHIKAWA, Seiji 益満, 侃 MASUMITSU, Sunao open access During march of the three years of 1970 to 1972, hydrographical observations and experimental trawl fishing were carried out in the region of the Danzyo Islands in the East China Sea to know the relation between the hydrographical conditions and the catch of Pampus argenteus (Euphrasen). From the observations the following results were obtained. 1) The sea area extends from the continental shelf of the East China Sea to the Okinawa circular basin. The sea bottom is a very flat plain favorable for trawl fishing. 2) The bottom water conditions during the three years mentioned above was, bottom water temperature 13.0-16.5°C, salinity 34.40-34.80‰, and at the respective year there was some difference in the hydrographical conditions, and, there was a tendency of the areas of large catch being at the front of water mass, vicinity of current boundaries, and, in regions where difference in temperature existed. 3) At the time of favorable catch (weight of catch above 10 kg per hour) the temperature of the bottom layer was 13.5-16.5°C, and the best catch was at the temperature of 15°C, followed by that of 16°C. 4) The body length (Fork length) of Pampus argenteus (Euphrasen) was 20.0-26.0 cm in 80-90% of the catch. 鹿児島大学 Kagoshima University 1974-12-25 jpn departmental bulletin paper VoR http://hdl.handle.net/10232/13721 https://ir.kagoshima-u.ac.jp/records/747 0453087X AN00040498 鹿児島大学水産学部紀要 Memoirs of Faculty of Fisheries Kagoshima University 23 57 63 https://ir.kagoshima-u.ac.jp/record/747/files/AN00040498_v23_p57-63.pdf application/pdf 3.5 MB 2016-10-27 1974-12-25