サケ科魚に寄生する武田微胞子虫の感染に及ぼす水温の影響

DOI Web Site 被引用文献3件 参考文献16件
  • 善家 孝介
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • 浦和 茂彦
    Research Division, National Salmon Resources Center
  • 藤山 勲
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • 横山 博
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • 小川 和夫
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo

書誌事項

タイトル別名
  • Effects of Water Temperature on Infection of the Microsporidian Kabatana takedai in Salmonids

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抄録

Effects of water temperature on infection of the microsporidian Kabatana takedai were investigated in salmonids under field and experimental conditions. “Cysts” of K. takedai appeared in the heart and the skeletal muscle of wild juvenile masu salmon Oncorhynchus masou from the Chitose River, Hokkaido, during summer in 2003 and 2004, when the river water temperature exceeded 15°C. Following the exposure of naive juvenile sockeye salmon Oncorhynchus nerka to river water (18-19°C) for 3 days, the fish were transferred to separate tanks where the temperatures were set to 11, 13, 15 and 17°C. Prevalence of infection reached more than 70% in the 13, 15 and 17°C groups, but in the 11°C group, it remained less than 30%. However, shifting a part of the 11°C group to 18°C increased the prevalence to 71 % by 23 days after the elevation of the temperature. When juveniles were exposed to 11°C river water and subsequently kept at 9°C for 42 days, no development of K. takedai occurred even after the temperature was elevated to 15°C. These results indicate that temperature manipulation is partially effective as a preventive method of K. takedai infection.

収録刊行物

  • 魚病研究

    魚病研究 40 (3), 119-123, 2005

    日本魚病学会

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