Abstract
To aid the decision-making process in habitat restoration of anadromous fish, a GIS-based prioritizing method for site selection was developed. We studied the usefulness of this method in the masu salmon (Oncorhynhus masou) spawning habitat in the Shiribetsu river watershed located in the southwest part of Hokkaido. First, the area available for upstream migration was defined; dams were considered as a barrier while defining this area. Second, extraction of a habitat suitable for spawning by parameterization of channel morphology and riparian vegetation was examined. Finally, gap analysis between suitable habitats and area available for migration was carried out. Those result enabled priority setting for restoration of anadromous fish habitat as improvement of migration corridor.
