About YAGAWA SHIN'ICHIRO
About 佐賀県佐賀西高
About HAMANO DAISAKU
About NAKAHARA MASATO
About 佐賀県厳木高
About 佐賀自然史研究
About Saga prefecture
About paddy field
About irrigation canal
About habitat distribution
About freshwater fish
About fauna
About Population ecology
About 佐賀
About 地区
About 圃場整備
About 実施
About 環境
About 淡水魚類
About 調査