COMPARATIVE STUDIES ON THE DESTRIBUTION AND BIOLOGY OF CLADOCERA OCCURRING ON THE LITTORAL ZONE OF LAKES IN JAPAN

对日本天然湖泊中分布的滨海枝角类(甲壳纲、枝角纲)进行了调查。样品来自(1)位于长野县的三个湖泊，即木崎湖、中田湖和青木湖，以及(2)广泛分布于日本、日本、日本等岛屿，从北海道到九州的天然湖泊。在此基础上，分析了滨岸带枝角类物种的季节消长规律，以及滨岸带和湖滨带枝角类区系的差异。到目前为止，在日本群岛的湖泊、池塘、沼泽和河流中检测到85种枝角类。研究表明，仅在湖泊、池塘和临时池塘的滨海地带发现了85种55种。由于目前只有一部分标本在显微镜下观察并被鉴定为该种，因此将利用后者的标本来研究日本枝角类物种的分布和生物学。从现在开始，我要在显微镜下观察样品。已确定的物种信息被输入个人计算机，作为沿海枝角类的数据库。

Littoral cladoceran species (Crustacea, Cladocera) distributed in the natural lakes of Japan were investigated. Samples were collected from (1) three lakes located on Nagano Prefecture, Lake Kizaki, Lake Nakatuna and Lake Aoki, and (2) the natural lakes widely distributed in the Japanese, Islands, from Hokkaido to Kyushu. The seasonal fluctuation of cladoceran species occurred in the littoral zone and the differences of cladoceran fauna between littoral zone and limnetic zone are analyzed using the former samples. Until now 85 species of Cladocera were detected from the lakes, ponds, swamps and rivers in the Japanese Islands. It was shown in this study that 55 species of 85 were found only in the littoral zone of lakes, ponds and temporary pools. And the distribution and biology of Japanese cladoceran species will be studied using the latter samples, because at the present time only a part of samples were observed under the microscope and identified to the species. I am going to observe the samples under the microscope from now on. The information on the species already identified was inputted into the personal computer as the database of littoral Cladocera.