Abstract
HSI model of Periophthalmus modestus was produced on the data of intensive survey of the habitat in the river mouth mudflat of Arakawa river. The adaptability of the model was tested through the application to other mudflats in Tokyo Bay. The significant factor of habitat was selected as coverage of reed, ground elevation, oxidation-reduction potential, and silt-clay content of mud through recursive partitioning. The importance of the dissolved oxygen content of tidewater and the strength of wave was recognized after the application of the model to other mudflats. HSI model plays its own role through the habitat and temporal comparison. Modeling should need the reference data of some habitats for improving different problem.
