섹션 개요

    • Red tide outbreak was confirmed in Akkeshi Bay on September 13, 2021
      • Discovered by associate professor ISADA of Akkeshi Marin Station, Hokkaido University
    • Confirmation that the dominant species is Karenia selliformis（Iwataki et al., 2021）
      • This is the first report of red tide in Karenia selliformis in Japan

    • Extensive damage to fisheries

      • As of December 10, 2021, Hokkaido reported a total of 8.1 billion yen in damage, including 2,800 tons of sea urchins and 28,000 salmon
      • The Kushiro Fisheries Research Institute, Hokkaido Research Organization, Fisheries Research Department discovered the mass death of a benthic organism, “sipunculids” on the seafloor 24 km off the coast of Tokachi at a depth of 130 m (Hokkaido Shimbun Press, December 10, 2021)
    • According to the announcement by the Hokkaido Research Organization, Fisheries Research Department, the red tide is likely to have almost ended as of November 22 (Central Fisheries Research Institute, Hokkaido Research Organization, Fisheries Research Department)