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《Journal of Tea Science》 1992-01
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Study on the Ichthyism Activity of Tea Saponin and Its Application Ⅳ.Effects of Water Salinity and Water Temperature on the Ichthyism Activity of Tea Saponin

~1Zhu Quanfen;~1Xia Chunhua;~2Liang Yaquan;~2Sun Xiutao;~1Fan Xingtu;~1Tang Liping(1 Tea Research Institute,Chinese Academy of Agricultural Sciences,Hangzhou)(2 Yellow Sea Fisheries Research Institute,Chinese Academy of Fisheries Science,Qingdao)  
Effects of water salinity and water temperature on the ichthyismactivity of tea saponin to Tridentigic trigbnbcephalus GLL and Carassius auratuswere tested.Results showed that the ichthyism activity of tea saponinincreased with the increasing of the water salinity.The LC_(100)of teasaponin to Tridentigic trigonocephalus GLL were 1.0,0.9,0.9,0.7 and 0.3ppm respectively at the salinities of 6.5%,14.4%,20.9%,27.5% and32.7%,indicating stronger ichthyism activity of tea saponin in sea waterwith higher salinity.A quadratic equation relation existed between thelethal speed of Carassius auratus and the water salinity when the salinityranged from 0 to 12%.The fish died slowly under the salinities from4% to 10%(the most slowly under the salinity of 6%).The higherthe water temperature was,the faster the two experimented fishes died.Reasons of the effects of water salinity and water temperature on theichthyism activity of tea saponin were also discussed in this paper.
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