Supplementary material 2 (Video). マーキングされたワーカーが糸で吊るされたワーカーから逃げる行動
(5.5MB, 00:00:03)撮影日：2019/06/18
撮影場所：末吉公園, 沖縄, 日本
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植松潤平
(Jumpei Uematsu)
2019/07/09登録
種類:トゲオオハリアリ, Diacamma sp.
キーワード: アリ 攻撃 巣仲間識別 社会性昆虫
動物界 >不明 >不明 >不明 >不明 >不明 >
もしくは 動物界 >節足動物門 >昆虫綱 >膜翅目 >アリ科 >トゲオオハリアリ属 >
トゲオオハリアリのワーカーは、巣から遠く離れたところで同種非巣仲間アリ（マーキング無し、糸で吊るされている）と遭遇したとき、しばしば非巣仲間アリから逃げだした。
Below is the abstract from the article containing this video:
Aggression toward competitors is a useful measure of resource ownership and defense in animals, but aggressive behavior is costly. Therefore, it is predicted that animals will display aggression only when the expected benefit to individual fitness exceeds the expected cost. In ants, when conspecific individuals belonging to different colonies encounter each other, fighting occurs, seemingly facultatively. However, the context that influences the expression of ants' aggressive behavior, especially in the field, is still largely unknown. We investigated the plasticity of aggressiveness toward non-nestmates in Diacamma sp. from Japan. Our field experiment clearly showed that the same foragers that were aggressive toward non-nestmates in the vicinity of their nest changed to be non-aggressive at greater distances from the nest. Furthermore, the size of the colony to which the foragers belonged weakly but significantly affected their aggressiveness: foragers belonging to larger colonies behaved more aggressively toward non-nestmates. We discuss the possible adaptive significance of the observed facultative aggression between conspecific non-nestmates. Digital video images related to the article are available at http:// www.momo-p.com/showdetail-e.php?movieid=momo190618ds01a and http://www.momo-p.com/showdetail-e.php?movie id=momo190618ds02a.
Jumpei Uematsu, Masayuki Hayashi, Hiroyuki Shimoji, Michel-Olivier Laurent Salazar, and Kazuki Tsuji (2019).
Context‐dependent aggression toward non‐nestmates in the ant Diacamma sp. from Japan. J. Ethol. 10.1007/s10164-019-00611-8