ビデオ4 2頭のオスの仔と母親が一緒に掻き出し。1頭は巣内から土や巣材を掻き出し、2頭は巣外へ土や巣材を運ぶ
(75.5MB, 00:00:24)撮影日：2014/11/12
撮影場所：山口県山口市宮野龍花
田中 浩
(Hiroshi Tanaka )
2021/08/04登録
種類:ニホンアナグマ, Meles anakuma
キーワード: 巣穴維持管理 同時に掻き出し 兄弟 オス仔 分散遅延個体
動物界 >脊索動物門 >哺乳綱 >食肉目 >イタチ科 >アナグマ属 >
Below is the abstract from the article containing this video:
In some vertebrates, sexually mature individuals delay dispersal from their natal sites. Delayed dispersers are known to help their parents in many species; however, few studies have investigated the behavior of delayed dispersers in carnivores. Male offspring of the Japanese badger, Meles anakuma, remain in their natal sites and share setts with their mothers well after reaching sexual maturation. In this study, we investigated the contribution of male delayed dispersers in den maintenance activities of digging and bedding at their setts from September to February between 2010 and 2018. We found that delayed dispersers contributed approximately 60 and 30% of digging and bedding tasks, respectively. Specifically, while digging was constantly performed throughout the surveyed period, efforts in bedding gradually increased from September to February. We also found that delayed dispersers occasionally performed digging and bedding simultaneously with their mothers and siblings. Mothers may allow the male offspring to remain in the natal sites because of their help with den maintenance. It is probably advantageous for the males to remain in a familiar environment and have access to resources until they become large and competitive enough to establish and defend their mates and their own territories. Digital video images related to the article are available at http://www.momo-p.com/showdetail-e.php?movieid=momo210707ma01a, http://www.momo-p. com/showdetail-e.php?movieid=momo210707ma02a, http://www.momo-p.com/showdetail-e.php?movieid=momo210707 ma03a, http://www.momo-p.com/showdetail-e.php?movieid=momo210707ma04a, http://www.momo-p.com/showdetail-e. php?movieid=momo210707ma05a, http://www.momo-p.com/showdetail-e.php?movieid=momo210707ma06a and http:// www.momo-p.com/showdetail-e.php?movieid=momo210707ma07a.
Hiroshi Tanaka, Yukihiro Fukuda, Etsuko Yuki, Yukihiro Ota, Eiji Hosoi, and Wataru Kojima (2022).
Cooperative den maintenance between male Japanese badgers that are delayed dispersers and their mothers. J. Ethol. 10.1007/s10164-021-00718-x