Abstract
Environmental factors affecting the capture rate of the Japanese water shrew Chimarrogale platycephala were investigated in the Kamikoshi River, Aichi, central Japan, from June to December in 2011. The shrews were significantly more frequently captured at confluences and in narrow secondary tributaries not shown on the 1/25,000 scale topographical map published by the Geographical Survey Institute. They were also more frequently captured within three days after heavy rainfall (over 150 mm/day). Soil inflow into the tributaries caused by pavement construction projects did not affect capture rate.
