両側回遊型甲殻類の生態に着目した生息空間連続性評価手法の開発

抄録

Conservation of habitat networks is important to conserve and restore aquatic systems. Especially for migrating species, habitat fragmentation may cause extinction of local populations. In this study, we made a field investigation of the distribution of the amphidromous freshwater shrimp Caridina leucosticta in Aida River, Aichi, Japan, to clarify the effects of river weirs on the migration of this shrimp. Also we developed a method of habitat network assessment for this shrimp by applying graph theory. The distribution pattern of this shrimp simulated by our method was very similar to this shrimp distribution observed in the field investigation. Thus, we conclude that our assessment method can simulate habitat networks with high accuracy. We discuss the development potential of this assessment method for habitat networks by applying graph theory and the application of this method for conservation and restoration of habitat networks.