An assessment of traffic volume impacts on brown bear movements near roads in Shiretoko National Park, Hokkaido, Japan

概要

論文の詳細を見る
Detectable movement rates and road crossing rates of seven radio-collared brown bears Ursus arctos yesoensis were compared with traffic volume indices (TVI) in Shiretoko National Park during 1994, 1995 and 1996 in order to evaluate the impacts of vehicle traffic on bear road crossings. All bears in our study moved most often during daytime, although they showed some individual variation. Road crossing rates of bears were highest in the morning, daytime and evening periods. Brown bears crossed roads during the daytime, when TVI was the highest, as well as during the morning and evening when TVI was low. Furthermore, when vehicle traffic volumes peaked, the mean pooled TVI values during the time periods when road crossings were detected did not differ from the values when no road crossings were detected. Road crossings by brown bears were not inhibited by vehicle traffic in Shiretoko National Park.
野生生物保護学会の論文