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Toxicity Evaluation of Chemicals using Tree Frog Embryos, Hyla japonica  

Ko, Sun-Kun (Deptartment of Biology, Honam University)
Publication Information
Korean Journal of Environment and Ecology / v.26, no.5, 2012 , pp. 675-681 More about this Journal
Abstract
In this experiment, I investigated toxicity evaluation of chemicals using domestic frog embryos, along FETAX (Frog Embryo Teratogenesis Assay-Xenopus) protocol. I investigated $Cu^{2+}$ and Tebuconazole effect on the tree frog, Hyla japonica, embryos by probit analysis. Mortality and malformation rates increased and larval body length decreased depending on the concentrations of $Cu^{2+}$ and Tebuconazole. The teratogenic concentration ($EC_{50}$) of $Cu^{2+}$ and Tebuconazole were 0.05, 5.0mg/${\ell}$, respectively and the embryo lethal concentration ($LC_{50}$) of $Cu^{2+}$ and Tebuconazole were 0.16, 38.5, respectively. The teratogenic index (TI) appeared 3.0 in $Cu^{2+}$ and 7.7 in Tebuconazole, which showed teratogenicity in embryonic development of Hyla japonica. These results reveal that $Cu^{2+}$ and Tebuconazole in this experiment suppressed the development of embryos at relatively low concentration. Much of Hyla japonica embryos can be secured, and easy to incubate. In addition, mortality, malformation ratios, malformation patterns and growth rates are similar to the results from the other assay systems. Therefore, the Hyla japonica embryo teratogenesis assay system could be a useful tool to evaluate toxicity of pollutants in environment.
Keywords
$Cu^{2+}$; TEBUCONAZOLE; TERATOGENICITY; Hyla japonica;
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