On The Distribution of the Plankton in the East China Sea and Yellow Sea-VII

Abstract

This is the third report of my observation on the plankton in the Eastern China Sea and Yellow Sea. This observation has been studied from October to December, for the years 1948-1949. The plankton samples here dealt with were obtained by vertical hauls at 11 fishing grounds. As dominant species in phytoplanktons, can be recorded as the following. Coscinodiscus sp., Corethron petsgicum at 1948, and Biddulphia sinensis, B, aurita, Ptanktoniella sol, Coscinodiscus janishii, Ditylium Brightwetli at 1949. In zooplankton Oithona similis, Palacatanus aculeatus, Salpa vrmueronata, S. democratica, Nauplii of Copepoda, Veliger tarvae and several kinds of Foraminifera can be seen. Generally the phytoplankton are very, variable but the zooplankton not so variable through the both years. Considering from the fact that the composition of the plankton consisting of only several kinds of tetnpolate oceanic planktons and on the contrary consisting of rather many littoral plankton, I imagine that the influence of the water of China regions and the West Corean Strait is very great.