Effects of viruses infecting harmful algae, HaV, HcV and HcRNAV on bivalves, zooplankton, seaweeds, fishes, and a mouse
2005
Tomaru, Y.(National Research Inst. of Fisheries and Environment of Inland Sea, Ohno, Hiroshima (Japan)) | Katanozaka, N. | Kotani, Y. | Yoshida, G. | Yamanaka, S. | Tanabe, H. | Yamaguchi, M. | Nagasaki, K.
Harmful bloom-forming algae, Heterosigma akashiwo (Hada) Hada (Raphidophyceae) and Heterocapsa circularisquama Horiguchi (Dinophyceae) cause a mass mortality of cultured fish and bivalves, respectively. In recent years, a double-stranded DNA (dsDNA) virus HaV infectious to H. akashiwo, and a dsDNA virus HcV and a single-stranded RNA (ssRNA) virus HcRNAV, both infectious to H. circularisquama were isolated from natural seawaters in Japan. These viruses have some important characteristics suitable as microbiological algicidal agents. However, from the viewpoint of risk management, evaluation of their effects on various organisms is essential to assess the possibility of their use for eliminating the harmful algal blooms. In the present study, we have evaluated effects of the viruses on marine organisms (bivalves, zooplankton, seaweeds and fishes) and mammals (a mouse), and revealed that there was no significant acute toxicity against the tested organisms through the experiments. These results suggest that the algal viruses are safe for other organisms.
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