Infanticide or predation? Cannibalism by a brown bear in Hokkaido, Japan

Taiki Ito; Hinako Katsushima; Kanji M. Tomita; Tomoka Matsumoto

doi:10.2192/URSUS-D-22-00006.1

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14 December 2022 Infanticide or predation? Cannibalism by a brown bear in Hokkaido, Japan

Taiki Ito, Hinako Katsushima, Kanji M. Tomita, Tomoka Matsumoto

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Ursus, 2022(33e13):1-5 (2022). https://doi.org/10.2192/URSUS-D-22-00006.1

Abstract

Cannibalism in brown bears (Ursus arctos) is infrequently reported worldwide. This study reports evidence of brown bear cannibalism in northern Hokkaido, Japan. In April 2017, we found a bear scat containing the body parts of a bear cub. We also found a series of tracks (width of the front track: 16 cm) of an adult male bear near the scat, which were likely associated with the excrement. The scat was found at the end of a long hibernation season and the beginning of mating season of brown bears in Hokkaido. The timing suggests that the cannibalism event was a consequence of infanticide by a male bear as part of mating strategy, namely, sexually selected infanticide.

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Taiki Ito, Hinako Katsushima, Kanji M. Tomita, and Tomoka Matsumoto "Infanticide or predation? Cannibalism by a brown bear in Hokkaido, Japan," Ursus 2022(33e13), 1-5, (14 December 2022). https://doi.org/10.2192/URSUS-D-22-00006.1

Received: 18 March 2022; Accepted: 25 July 2022; Published: 14 December 2022

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