A new blood fluke of the genus Cardicola (Trematoda: Sanguinicolidae) from Pacific bluefin tuna Thunnus orientalis (Temminck & Schlegel, 1844) cultured in Japan |
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| Authors: | K Ogawa S Tanaka Y Sugihara I Takami |
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| Institution: | 1. Department of Molecular Medicine, University of South Florida, 3720 Spectrum Blvd, Tampa, FL 33612, USA;2. Department of Global Health, University of South Florida, 3720 Spectrum Blvd, Tampa, FL 33612, USA;3. Department of Biology, College of Charleston, 205 Ft Johnson Road, Charleston 29412, USA |
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| Abstract: | A new sanguinicolid blood fluke, Cardicola orientalis n. sp., is described from the afferent branchial artery and heart of Pacific bluefin tuna Thunnus orientalis (Temminck & Schlegel) cultured in Mie and Nagasaki Prefectures, Japan. The new species is most similar to C. ambrosioi Braicovich, Etchegoin, Timi et Sardella, 2006 from the Brazilian flathead, Percophis brasiliensis Quoy & Gaimard, but can be differentiated by the position of the female genital pore (in midline or slightly sinistral in C. orientalis vs. sinistral in C. ambrosioi) and much longer distance between male and female genital pore (101 μm vs. 27 μm). In wet mount preparations of infected fish, eggs were accumulated in great numbers in the gill lamellae and afferent filament arteries. Importance of this blood fluke infection of cultured Pacific bluefin tuna in Japan is discussed. |
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