人造湖糠平湖の湖沼学的予察調査
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概要
- 論文の詳細を見る
A limnological survey of Lake Nukabira in Hokkaido, a newly formed body of fresh water impounded as a reservoir about one year previously, was carried out in November, 1956. The character of a bog lake in respect to physical and chemical properties of lake water was not found in the present lake. On the other hand, the plankton communities of the new reservoir did present a positive feature; the number of plankton species was very small, counting only 8 species in total. Of these, a diatom of Asterionella formosa occurred in abundance. As was to be expected from this fact, such necessary nutrient substances for the growth of phytoplankton as Silicate-Si and Phosphate-P in the lake water were remarkably reduced. The lake which yielded 56.1kg/ha in dry weight of plankton ranked as a lake of eutrophic type. From the aspect of plankton communities, in this lake fish having comparatively delicate gill rakers, such as "Himemasu", Oncorhynchus nerka, are expected to be successfully cultured.
- 帯広畜産大学の論文
- 1957-03-30