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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第63巻 第3号 >


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Title: 和歌山県田辺湾と大阪湾における赤潮藻殺藻微生物の分布
Other Titles: Distributions of the Algicidal Microorganisms against the Harmful Phytoflagellates in Tanabe Bay (Wakayama Prefecture) and Osaka Bay, Japan
Authors: 今井, 一郎1 Browse this author →KAKEN DB
西垣, 友和2 Browse this author
岡本, 悟3 Browse this author
山本, 圭吾4 Browse this author
竹内, 照文5 Browse this author
吉永, 郁生6 Browse this author
平田, 八郎7 Browse this author
Authors(alt): Imai, Ichiro1
Nishigaki, Tomokazu2
Okamoto, Satoru3
Yamamoto, Keigo4
Takeuchi, Terufumi5
Yoshinaga, Ikuo6
Hirata, Hachiro7
Keywords: Red tide
Killer microorganisms
Algicidal bacteria
Ulva pertusa
Seaweed beds
Karenia mikimotoi
Issue Date: 10-Dec-2013
Publisher: 北海道大学大学院水産科学研究院
Journal Title: 北海道大学水産科学研究彙報
Volume: 63
Issue: 3
Start Page: 23
End Page: 31
Abstract: Seasonal fluctuations of killer microorganisms (substantially algicidal bacteria) were investigated with the microplate MPN method in surface seawater and on the surface of the green alga Ulva pertusa in Osaka Bay and Tanabe Bay of Wakayama Prefecture.  Main species of target red tide oganisms were the raphidophyte Chattonella antiqua and the dinoflagellate Karenia mikimotoi. On the surface of U. pertusa, K. mikimotoi killers (Km-killers) were most abundantly detected with a maximum value of 1.38×106 MPN g-1 (wet weight) and C. antiqua killers (Ca-killers) also showed a high value of 3.60×105 MPN g-1 (wet weight). In seawater, most part of killer microorganisms was substantially algicidal bacteria, and Km-killers showed the maximum values of 103-104 MPN ml-1 at intertidal seaweed bed and aquaculture pond with abundant U. pertusa. Km-killers were less abundant in offshore seawater (< 101 MPN mL-1 in Osaka Bay and < 102 MPN mL-1 in Tanabe Bay). Ca-killers also tended to be a little bit more abundant in seawaters of the coastal seaweed bed. It is suggested that seaweed beds composed of such as Ulva pertusa play an important role for harboring and supplying killer microorganisms to adjacent coastal environments, and contribute to prevent massive developments of harmful algal blooms in the coastal sea.
Type: bulletin (article)
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第63巻 第3号

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