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김무찬(Mu Chan Kim),유홍식(Hong Sik Yu),옥미선(Mi Sun Ok),김창훈(Chang Hoon Kim),장동석(Dong Suck Chang) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.3
For investigating the activities of algicidal bacteria, the variations of algicidal bacterial population and chlorophyll-a were checked weekly in Chindong Bay, Korea, from May to July, 1998. For identifying their killing characteristics, three strains were selected from the isolated algicidal bacteria. The density of algicidal bacteria kept changing in the range of 6.0×10¹ to 6.4×0^5 cells ℓ^(-1). The density flux of algiadal bacteria coincided with that of chlorophyll-a by a week of lag time. Three algicidal bacteria isolated from held strains, H519S5-4, H605S5-15 and H605S5-22, were investigated in nine microalgal species, Heterosigma akashiwo, Chattonella sp. (Raphidophyceae), Gymnodinium catenatum, Gyrodinium impudicum, Cochlodinium polykrikoides(Dinophyceae), Chaetoceos sp., Coscinodiscus granii, Ditylum brightwellii, Thalassiosira rotula (Bacillariophyceae). Shain HbO5S5-22 showed a wide algicidal activities over nine microigae, strain H605S5-15 over H. akashiwo, G. catenatum, T. rotula, Chattonella sp. and strain H519S54 over H. skashiwo, Chattonella sp., Chaetoceros sp., G, catenatum. The activities of the three strains were detected by the secretion of algicidal substances. Therefore, it is suggested that the activities of algicidal bacteria have a significant influence over the population dynamics of phytoplankton and get involved with the sharp decrease in red tides in the coastal area.