About ONOZEKI YUMI
About SUZUKI KYUUMA
About IZUMI SHOTARO
About KUGE TOSHIHIRO
About MIYAHARA YOSHIO
About 群馬県自然環境調査研究会
About TANAKA HIDEKI
About 群馬県水産試験場研究報告(CD-ROM)
About river
About river environment
About zoobenthos
About biomass
About dominant species
About habitat distribution
About composition(constitution)
About sewage treatment plant
About drainage arrangement
About discharge to river
About species composition
About biomass
About Tonegawa River
About Fisheries animals other than fishes
About Animal ecology in general
About Sewerage engineering and wastewater treatment in general
About 利根川
About 水系