Study on the plankton from Lake Utonai-numa, Hokkaido

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  • TANAKA Masaaki
    Faculty of Environmental and Information Sciences, Yokkaichi University
  • FUJITA Satoko
    Aichi University of Education, Graduate School of Education

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Other Title
  • ウトナイ湖のプランクトン相について
  • ウトナイコ ノ プランクトンソウ ニ ツイテ

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Description

Plankton collected from Lake Utonai-numa, Hokkaido, in August, 2000 was studied. 77 taxa of zooplankton and 171 taxa of phytoplankton were found in this lake, the abundant species being Arcella discoides, Centropyxis aculeata, Centropyxis hirsuta, Bosminopsis deitersi, Tabellaria fenestrata, Spirogyra sp., Pediastrum araneosum, and Pediastrum boryanum var. longicorne. Some species such as Phryganella nidulus (Protozoa), Cyphoderia trochus (Protozoa) are found for the first time in Japan. llyocryptus ezoensis and Eurycercus nipponica are neu species.

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