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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第62巻 第1号 >


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Title: 和歌山県下芳養湾における海水中およびアオサに付着する赤潮藻殺藻細菌の分布
Other Titles: Distribution of algicidal bacteria against red tide phytoplankton in seawater and on the surface of the green alga Ulva pertusa in Shimo-Haya Bay, Wakayama Prefecture
Authors: 今井, 一郎1 Browse this author →KAKEN DB
岡本, 悟2 Browse this author
西垣, 友和3 Browse this author
吉永, 郁生4 Browse this author
竹内, 照文5 Browse this author
Authors(alt): Imai, Ichiro1
Okamoto, Satoru2
Nishigaki, Tomokazu3
Yoshinaga, Ikuo4
Takeuchi, Terufumi5
Keywords: Red tide
Killer bacteria
Algicidal bacteria
Ulva pertusa
Issue Date: 28-Mar-2012
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
Journal Title(alt): Bulletin of Fisheries Sciences, Hokkaido University
Volume: 62
Issue: 1
Start Page: 21
End Page: 28
Abstract: Seasonal fluctuations of algicidal bacteria were investigated with the microplate MPN method in surface seawater and on the surface of the green alga Ulva pertusa in cage culture for poly-culture at the stations in Shimo-Haya Bay, Wakayama Prefecture. Target red tide species were three raphidophytes of Chattonella antiqua, Heterosigma akashiwo and Fibrocapsa japonica, and two dinoflagellates of Karenia mikimotoi and Heterocapsa circularisquama. In seawater, most part of killer microorganisms was substantially algicidal bacteria, and the most abundant killer bacteria were killers for Karenia mikimotoi and followed by killers for Fibrocapsa japonica. The maximum value was 2.2×10^4 MPN ml^-1 for K. mikimotoi killers. On the surface of U. pertusa, K. mikimotoi killers were also most abundantly detected with a maximum value of 1.1×10^6 MPN g^-1 (wet weight) and F. japonica killers also showed a high value of 1.9×10^5 MPN g^-1 (wet weight). Isolation of killer bacteria after colony formation and co-culture experiments, K. mikimotoi killers and F. japonica killers also displayed high abundances, and other killers such as C. antiqua killers were detected with rather high values of 10^4~10^5 cells g^-1 (wet weight). Poly-culture of seaweeds and fishes is not only environment friendly in aquaculture but also useful sources for preventing harmful red tides 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62巻 第1号

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