¨ Daily activity patterns of brown bear (Ursus arctos) of the Sikhote-Alin mountain range (Primorskiy Krai, Russia)
I. V. Seryodkin, A. V. Kostyria, J. M. Goodrich, D. G. Miquelle
Daily activity patterns of brown bears were monitored using radiotelemetry from 1993 to 2006, in the Sikhote-Alin Biosphere Reserve and adjacent areas. Outside of the denning period, bears were active for approximately 52% of the 24-hour period. Males were more active (64% of total time) than females (51%). Brown bears in the Sikhote-Alin are diurnal and crepuscular, but switch to a nocturnal pattern in areas of high anthropogenic influence. During the summer months, daily activity patterns were influenced by precipitation, cloud cover, and air temperature.