朝鮮海峽に於ける暖流性プランクトンの分布と海況とに就て

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At the beginning of June, 1932, a series of simultaneous oceanographical investigations in the Japan Sea were carried out by the fishery experiment stations located on the shores surrounding it, and plankton samples were collected at every observation station. I worked with the samples which were collected from the se between Kyûshû and southern Tyôsen, and divided this area according to the distributions of the temperate plankton into 4 regions: A, B, C, and D. In the material from “A, ” I found subtropical plankton such as Ceratocorys horrida STEIN, Stroptotheca indica KARSTEN, Calocalanus ?? pavo DANA, Candacia ethiopica DANA, Candacia truncata DANA, Centropages gracilis DANA, Centropages furcatus BRADY, Labidocera acnta DANA, Lab. detruncata DANA, Phaenna sp., etc., and thus I am inclined to think that this region is greatly influenced by the warm current “kuro-siwo.” The above-mentioned species could not be found in the samples from the “B” region, where a number of species of temperate oceanic plankton were seen. In the region “C, ” I saw many cosmopolitan temperate plankton, such as Oithona plumifera BAIRD, Evadne tergestina CLAUS, Penilia schmackeri RICHARD, Doliolum nationalis BORGERT, Chaetoceros spp., Rhizosolenia spp., Ceratium spp, etc., and some kinds of neritic plankton which seem to point to the conclusion that the coastal water of the southern part of the Yellow Sea or of the East China Sea influenced this area. In the region “D, ” I found none of the temperate oceanic plankton, and judging from the constituents of the plankton I consider that the water from the southern Yellow Sea or from the eastern China Sea flows into this region. The findings of the plankton material as given above coincide well with the distributions of the temperature and the salinity in these waters.

朝鮮海峽に於ける暖流性プランクトンの分布と海況とに就て

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