マスダ ヨシキ   Yoshiki Masuda
  益田 芳樹
   所属   川崎医療福祉大学  医療福祉学部 臨床心理学科
   職種   特任教授
論文種別 原著
言語種別 日本語
査読の有無 査読なし
表題 秋田県初記録2種(シナカイメンとマツモトカイメン)含む八郎潟の淡水海綿について
掲載誌名 正式名:秋田大学教育学部研究紀要,自然科学
ISSNコード:03651649
巻・号・頁 56,25-34頁
著者・共著者 石井照久, 益田芳樹
発行年月 2001/03
概要 Sasaki collected six species of freshwater sponges consisiting of five genera in Akita Prefecture in 1934 and 1939(personal communication). However, he did not try to collect freshwater sponges from Lake Hachiro at that time because the lake was a lagoon and contained sea water. From 1957, most of Lake Hachiro was reclaimed by drainage and by 1966 its water had changed throughly from brackish water to freshwater. After this change in water quality, only one freshwater sponge, Ephydatia fluviatilis (Linnaeus, 1758), from Lake Hachiro in Akita Prefecture had been reported by Toriumi(1976).
In the present report, eight species of freshwater sponges consisting of six genera from Lake Hachiro have been described, including the first reported occurence of Eunapius sinensis (Annandale, 1910) and Heterorotula multidentata (Weltner, 1895) in Akita Prefecture. The former species has been previously recorded at only three other locations in Japan. Therefore, to date, nine species consisting of six genera have been collected in Akita Prefecture.
Investigations such as this one will contribute to a clearer understanding of chage in the limnological environment.