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

doi:10.3106/ms2020-0101

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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

Author Affiliations +

Seungyun Baek,^1,* Tadashi Iwasaki,¹ Koji Yamazaki,² Tomoko Naganuma,³ Akino Inagaki,¹ Kahoko Tochigi,¹ Maximilian L. Allen,⁴ Chinatsu Kozakai,⁵ Shinsuke Koike^3,6

¹Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
²Department of Forest Science, Faculty of Regional Environmental Science, Tokyo University of Agriculture, Setagaya,Tokyo 156-8502, Japan
³Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
⁴Illinois Natural History Survey, University of Illinois, 1816 S. Oak Street, Champaign, IL 61820, U.S.A.
⁵Central Region Agricultural Research Center, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
⁶Institute of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan

^*To whom correspondence should be addressed. E-mail: altaica09@gmail.com

Mammal Study, 46(4):341-346 (2021). https://doi.org/10.3106/ms2020-0101

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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.

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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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Mammal Study
Vol. 46 • No. 4
October 2021

KEYWORDS

activity change

den entry

denning chronology

hibernation

Ursus thibetanus

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Seungyun Baek, Tadashi Iwasaki, Koji Yamazaki, Tomoko Naganuma, Akino Inagaki, Kahoko Tochigi, Maximilian L. Allen, Chinatsu Kozakai, Shinsuke Koike "Factors Affecting Pre-Denning Activity in Asian Black Bears," Mammal Study, 46(4), 341-346, (26 August 2021)

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