A <i>Chattonella</i> bloom in the Yatsushiro Sea, Japan in summer 2016: environmental characteristics during the bloom and mortality of cultured yellowtail <i>Seriola quinqueradiata</i>

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  • NAKASHIMA HIROKI
    Kagoshima Prefecture Fisheries Technology and Development Center
  • MURATA KEISUKE
    Kagoshima Prefecture Fisheries Technology and Development Center
  • YANO KOUICHI
    Kagoshima Prefecture Fisheries Technology and Development Center
  • NISHI HIROMI
    Kagoshima Prefecture Fisheries Technology and Development Center
  • YOSHIMURA NAOAKI
    Kumamoto Prefecture Fisheries Research Center
  • KUROKI YOSHIYUKI
    Kumamoto Prefecture Fisheries Research Center
  • KAWASAKI SHINJI
    Kumamoto Prefecture Fisheries Research Center
  • FURUKAWA SHINPEI
    Azuma-cho Fishery Cooperative Association
  • URA KEISUKE
    Azuma-cho Fishery Cooperative Association
  • MATSUO HITOSHI
    Azuma-cho Fishery Cooperative Association
  • KITATSUJI SAHO
    National Research Institute of Fisheries Environment of Inland Sea, Japan Fisheries Research and Education Agency
  • SHIKATA TOMOYUKI
    National Research Institute of Fisheries Environment of Inland Sea, Japan Fisheries Research and Education Agency
  • ABE KAZUO
    National Research Institute of Fisheries Environment of Inland Sea, Japan Fisheries Research and Education Agency
  • TOKUNAGA TAKAHISA
    Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency
  • OKAMURA KAZUMARO
    Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency
  • AOKI KAZUHIRO
    National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency
  • ONITSUKA GOH
    National Research Institute of Fisheries Environment of Inland Sea, Japan Fisheries Research and Education Agency

Bibliographic Information

Other Title
  • 2016年夏季に八代海で発生した<i>Chattonella</i>赤潮：発生環境と養殖ブリの斃死
  • 2016年夏季に八代海で発生したChattonella赤潮 : 発生環境と養殖ブリの斃死
  • 2016ネン カキ ニ ヤツシロカイ デ ハッセイ シタ Chattonella アカシオ : ハッセイ カンキョウ ト ヨウショク ブリ ノ ヘイシ
  • A Chattonella bloom in the Yatsushiro Sea, Japan, in summer 2016: environmental characteristics during the bloom and mortality of cultured yellowtail Seriola quinqueradiata

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Abstract

<p>　A harmful bloom of the raphidophycean flagellate Chattonella spp. occurred in the Yatsushiro Sea, Japan in summer 2016. The mechanism of occurrence of the bloom and the relationship to mass mortality of cultured yellowtail Seriola quinqueradiata were examined by analyzing field monitoring data. After nutrient concentration increased in the surface layer due to vertical mixing and intrusion of upwelled offshore water induced by meteorological disturbance, the population of Chattonella rapidly developed from the central to the southern area during early to mid-September when stratification formed again. The rate and timing of mortality of cultured yellowtail corresponded to cell density and the timing of increase of Chattonella spp., which were influenced by the strength of stratification in each fish farm. The present study suggests that real-time monitoring of oceanographic conditions is important for predicting short-term dynamics of Chattonella and for conducting countermeasures such as stopping feeding at appropriate times.</p>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 85 (2), 162-172, 2019-03-15

    The Japanese Society of Fisheries Science

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