Dominance hierarchy of worker ants as directed networks Hiroyuki Shimoji (Univ. Ryukyus, Japan & Univ. Tokyo, Japan) Masato S. Abe (Univ. Tokyo) Kazuki Tsuji (Univ. Ryukyus) Naoki Masuda (University of Bristol, UK) Ref: Shimoji, Abe, Tsuji & Masuda, J. R. Soc. Interface, in press (2014); arXiv:1407.4277; data available online
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Hiroyuki Shimoji, Masato S. Abe, Kazuki Tsuji, Naoki Masuda. Global network structure of dominance hierarchy of ant workers. Journal of the Royal Society Interface, in press (2014).
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Dominance hierarchy of worker ants as directed
networks
Hiroyuki Shimoji (Univ. Ryukyus, Japan & Univ. Tokyo, Japan)Masato S. Abe (Univ. Tokyo)Kazuki Tsuji (Univ. Ryukyus) Naoki Masuda (University of Bristol, UK)
Ref: Shimoji, Abe, Tsuji & Masuda, J. R. Soc. Interface, in press (2014); arXiv:1407.4277; data available online
Dominance hierarchy• Pecking order of hens (Schjelderup-Ebbe, 1922)
• Automise the access to food/mates/space/shelter
• Reduce aggregation
• Keep workers to work for the colony’s benefit
Thorleif Schjelderup-Ebbe (1894-1976)
- ✔ ︎ ✔ ︎ ✔ ︎ ✔ ︎ ✔ ︎
- ✔ ︎ ✔ ︎ ✔ ︎ ✔ ︎
- ✔ ︎ ✔ ︎ ✔ ︎
- ✔ ︎ ✔ ︎
- ✔ ︎
-
self
peer
Icon and picture from Freepik.com and Wikipedia
Dominance hierarchy as network
• Most studies have focused on
• How close data are to “linear” hierarchy
• How to rank individuals in a group
• Small groups
• Network analysis of dominance hierarchy has been surprisingly rare.
• Some recent work as undirected networks
• Triad census (Shizuka & McDonald, 2012)
Diacamma sp.
• Monogynous
• A colony contains at most one (functional, not morphological) queen.