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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 3099

Okada Yaichiro and Uyemura Mitsuo; [Biological Studies of the Thermal Waters of Japan (XVII) The Fauna of "Simogamo", a Salt Spring]. Jap.J.Limnol. 8(3/4):483-488, 1938

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The "Simogamo" hot spring which is in Minami-naka-mura, Kamo-gun, Sizuoka Prefecture, issues from tertiary strata along the banks of the river Aono. The thermal water is colorless, transparent, and has salty taste. Salt crystals may be seen on the rocks around the spring. An analysis made by the Experimental Hygienic Laboratory of the Home Department, in 1912, shows that the spring may be classified as "salt spring". A biological survey was made at a number of sources of the hot spring during the period from January to April, 1934, and eighteen species of thermophilous animals, were found. As shown in the following table, although the Protozoa flourish in the hot spring, the Metazoa do not. Nuclearia sp. and Vaginicola were discovered for the first time in a thermal water in Japan. All the other species are common to the various hot springs of Japan, as previously reported.