About TSUBOI JUN'ICHI
About (国研)水産総合研究センター増養殖研究所
About TAKAGI YUYA
About 栃木県水産試験場
About 日本水産学会誌
About Plecoglossus altivelis
About habitat
About survey on actual situation
About aquatic resource
About pumice
About river environment
About habitat environment
About Microhabitat
About environmental research
About environmental agent
About Population monitoring
About stock assessment
About seed release
About river system
About Biological research
About pumice
About stocking efficiency
About Fishes
About Fishing grounds and fishing conditions
About Population ecology
About アユ
About 生息
About 環境要因