アルテミア卵と共に渡来する塩水湖産アミーバについて

概要

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In culture basins of Artemia salina a small amoeba of the limax type was found as a constant habitant. We have come to the conclusion that this amoeba is not a salt-resistant species accidetly introdeced from Japanese fresh water sources, but is the species Amoeba flowersi which has come from Great Salt Lake in Utah U.S.A Actually we detected the cysts of this amoeba attached to the surface of dried eggs of Artemia salina imported from the U.S.A. We observed that this amoeba has no contractile vacuole while being subjected to the salinity of standard sea-water, but when this medium is diluted a litle a functional contractile vacuole is produced de nove. We noticed that Amoeba flowersi has a strong resemblance to Amoeba salina of Cagliari Salt Lake in Sardinia which was studied and named by Clara Hamburger. these species are similar with respect to their size, morphological structure and normal habitat.
1964-06-15