Abstract
1Department of Ecological Engineering, Toyohashi University of Technology, Toyohashi 441, Japan
2Department of Biology, Tokyo Metropolitan University, Hachioji 192–03, Japan
3Biological Laboratory, Nippon Medical School, Kawasaki 211, Japan
4Department of Bioscience and Technology, Iwate University, Morioka 020, Japan
5Department of Environmental and Natural Resources Science, Tokyo University of Agriculture and Technology, Fuchu 183, Japan