THE PRESERVATION AND UTILIZATION OF WILD POPULATIONS OF THE MEDAKA ORYZIAS LATIPES THE PRESERVATION AND UTILIZATION OF WILD POPULATIONS OF THE MEDAKA ORYZIAS LATIPES

When the first paper on the allozymic variations in wild populations of the Medaka Oryzias latipes was published by Sakaizumi et al.(1980), the number of the localities from which the fish were collected was 18. Since then, a continuing effort, primarily by Sakaizumi, has been made to collect the fish from other localities in Japan and China. At present, 95 Japanese and 2 Chinese wild populations have been preserved in the Zoological Institute, Faculty of Science, University of Tokyo. The main purpose of this brief note is to present a map showing the collection sites of the fish (Fig. 1). A very short summary about the work already performed and an introduction of studies under way utilizing these stocks will also be given. The first full listing of the stocks and their origins and allozymic characteristics will appear elsewhere (Shima et al., 1986).