Mass Mortality of Cage-cultured Orange-spotted Grouper Epinephelus coioides Associated with Renal Sphaerosporosis Caused by Sphaerospora epinepheli in South China Sea

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  • Xu Li-Wen
    Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization (Ministry of Agriculture), South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
  • Zhang Jing-Yong
    Fish Diseases Laboratory, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences
  • Feng Juan
    Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization (Ministry of Agriculture), South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
  • Wang Jian-Guo
    Fish Diseases Laboratory, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences

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  • Mass Mortality of Cage-cultured Orange-spotted Grouper <i>Epinephelus coioides</i> Associated with Renal Sphaerosporosis Caused by <i>Sphaerospora epinepheli</i> in South China Sea

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In November 2011, the renal sphaerosporosis was found in cage-cultured orange-spotted grouper Epinephelus coioides in a fish farm in Guangdong, China. The infected fish exhibited emaciation, anaemia, anorexia, renomegaly, slight splenomegaly, and occasionally skin ulcer. The cumulative mortality reached at 50% to 80% within 2 weeks, when water temperature ranged from 21°C to 27°C. The renal tubules were almost completely occluded by sporogonic pseudoplasmodia of a myxosporean, and mature spores were found in the lumen. Combined with morphological, histopathological, and molecular analyses, Sphaerospora epinepheli was suggested as the etiological agent. This is the first report of mortality case of cultured E. coioides associated with S. epinepheli.

収録刊行物

  • 魚病研究

    魚病研究 49 (4), 202-205, 2014

    日本魚病学会

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