1. 1)Suzuki, M., and Utumi, H.: Risk management of bioassay water environment, Kodansha Scientific, Tokyo (1998) (in Japanese)
2. 2)Kawabata, M., and Kakuda, F.: Water quality evaluation by Bioassay, JETI, 51(3), 171-173 (2003) (in Japanese)
3. 3)Wakabayashi, M.: Necessity of water quality monitoring and management that uses living thing, Shigen Kankyo Taisaku, 42(2), 65-72 (2005) (in Japanese)
4. 4)Japan Water Works Association: Monitoring measures of outbreak water pollution, 119-166, Japan Water Works Association, Tokyo (2002) (in Japanese)
5. 5)Harald, T. and Donat-P., H: Automated biomonitoring using real time movement analysis of Euglena gracilis, Ecotoxicology and Environmental Safety, 48(2), 161-169 (2001)