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26 August 2021 Factors Affecting Pre-Denning Activity in Asian Black Bears
Seungyun Baek, Tadashi Iwasaki, Koji Yamazaki, Tomoko Naganuma, Akino Inagaki, Kahoko Tochigi, Maximilian L. Allen, Chinatsu Kozakai, Shinsuke Koike
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Abstract

Hibernation (denning) is an important aspect of the life history of Asian black bears (Ursus thibetanus), and denning chronology can be influenced by biotic and abiotic factors. We investigated activity patterns during the pre-denning period of Asian black bears using statistical process control in combination with activity sensors to quantitatively identify a marked reduction in activity from 2006 to 2017 in the Ashio–Nikko Mountains, Japan. Pre-denning activities were detected in 29 of 35 cases (83%), with an average duration of 2.7 ± 1.7 days, which is one to three days shorter than the duration for brown bears (U. arctos). The effect of bear's age, sex, and the abundance of hard mast on the duration of pre-denning were not significant.

© The Mammal Society of Japan
Seungyun Baek, Tadashi Iwasaki, Koji Yamazaki, Tomoko Naganuma, Akino Inagaki, Kahoko Tochigi, Maximilian L. Allen, Chinatsu Kozakai, and Shinsuke Koike "Factors Affecting Pre-Denning Activity in Asian Black Bears," Mammal Study 46(4), 341-346, (26 August 2021). https://doi.org/10.3106/ms2020-0101
Received: 15 October 2020; Accepted: 6 June 2021; Published: 26 August 2021
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KEYWORDS
activity change
den entry
denning chronology
hibernation
Ursus thibetanus
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