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

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

Illinois Natural History Survey

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Pages (from-to)	341-346
Number of pages	6
Journal	Mammal Study
Volume	46
Issue number	4
DOIs	https://doi.org/10.3106/ms2020-0101
State	Published - Oct 1 2021

Keywords

Ursus thibetanus
activity change
den entry
denning chronology
hibernation

ASJC Scopus subject areas

Animal Science and Zoology

Online availability

10.3106/ms2020-0101

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title = "Factors Affecting Pre-Denning Activity in Asian Black Bears",

abstract = "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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AU - Baek, Seungyun

AU - Iwasaki, Tadashi

AU - Yamazaki, Koji

AU - Naganuma, Tomoko

AU - Inagaki, Akino

AU - Tochigi, Kahoko

AU - Allen, Maximilian L.

AU - Kozakai, Chinatsu

AU - Koike, Shinsuke

N1 - Publisher Copyright: ©

PY - 2021/10/1

Y1 - 2021/10/1

N2 - 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.

AB - 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.

KW - Ursus thibetanus

KW - activity change

KW - den entry

KW - denning chronology

KW - hibernation

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JF - Mammal Study

IS - 4

ER -

Factors Affecting Pre-Denning Activity in Asian Black Bears

Abstract

Keywords

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