An apparent case of infanticide in the Asiatic black bear in Japan

Despite being well-researched in several other bear species, the act of infanticide has yet to be documented in Asiatic black bears (Ursus thibetanus). We captured video footage of an apparent infanticide event in May 2016 using sensor cameras placed outside the winter den of a known female in Nagan...

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Published inUrsus (International Association for Bear Research and Management) Vol. 2021; no. 32e16; pp. 1 - 6
Main Authors Tamatani, Hiroo, Hiorns, Amelia, Yamamoto, Toshiaki
Format Journal Article
LanguageEnglish
Published International Association for Bear Research and Management 16.09.2021
Subjects
Asiatic black bear
breeding season
infanticide
Japan
Nagano Prefecture
sensor camera
Ursus thibetanus
winter den
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Abstract Despite being well-researched in several other bear species, the act of infanticide has yet to be documented in Asiatic black bears (Ursus thibetanus). We captured video footage of an apparent infanticide event in May 2016 using sensor cameras placed outside the winter den of a known female in Nagano Prefecture, Japan. We observed the presence of a known male outside the den, interacting with the female and her offspring. The female ultimately died and her body did not appear to have been consumed by the male bear. From our observations we considered both sexually selected infanticide and nutritional demand as possible motives behind the male's attack.
AbstractList Despite being well-researched in several other bear species, the act of infanticide has yet to be documented in Asiatic black bears (Ursus thibetanus). We captured video footage of an apparent infanticide event in May 2016 using sensor cameras placed outside the winter den of a known female in Nagano Prefecture, Japan. We observed the presence of a known male outside the den, interacting with the female and her offspring. The female ultimately died and her body did not appear to have been consumed by the male bear. From our observations we considered both sexually selected infanticide and nutritional demand as possible motives behind the male’s attack. 子殺し行動は数種のクマ類で研究されているものの、ツキノワグマ (Ursus thibetanus) では学術的な記載がない。 2016 年 5 月、曰本の長野県にお いて、メスのツキノワグマの冬眠穴前に設置したセンサーカメラで、子殺しと みられる事例が撮影された。オスダマは冬眠穴の前でメスグマおよび子ダマと 接触しており、最終的にメスダマも死亡したが、オスグマはメスダマの死体を 摂食しなかった。一連の観察結果から、オスグマの攻撃の背後にあった動機と して、性選択的な子殺し （SSI) と栄養要求の可能性を考察した。 キーワード：ツキノワグマ Ursus thibetanus, 子殺し、冬眠穴、交尾期、セン サーカメラ、長野県、日本
Despite being well-researched in several other bear species, the act of infanticide has yet to be documented in Asiatic black bears (Ursus thibetanus). We captured video footage of an apparent infanticide event in May 2016 using sensor cameras placed outside the winter den of a known female in Nagano Prefecture, Japan. We observed the presence of a known male outside the den, interacting with the female and her offspring. The female ultimately died and her body did not appear to have been consumed by the male bear. From our observations we considered both sexually selected infanticide and nutritional demand as possible motives behind the male's attack.
Author Yamamoto, Toshiaki
Hiorns, Amelia
Tamatani, Hiroo
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SubjectTerms Asiatic black bear
breeding season
infanticide
Japan
Nagano Prefecture
sensor camera
Ursus thibetanus
winter den
Title An apparent case of infanticide in the Asiatic black bear in Japan
URI http://www.bioone.org/doi/abs/10.2192/URSUS-D-20-00019.2
https://www.jstor.org/stable/48641541
Volume 2021
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