Studies on Multiple Functions of Collective Behavior Under Uncertain Information

• Project/Area Number: 15K16060
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Soft computing
• Research Institution: University of Tsukuba
• Principal Investigator: NIIZATO Takayuki 筑波大学, システム情報系, 助教 (00700163)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 群れ / 集団現象 / 自己組織化 / 頑健性と収束速度 / 身体イメージと群れ / 時間の非同期性 / 創発

Outline of Final Research Achievements

Our analysis of fish schools (Ayu) showed the possibility of inherent multiple functions for collective behavior. First, we showed that Ayu groups use the optimal strategy, known as Levy walk, for exploring behavior. Interestingly, although this strategy was used in both cases, that is, a single fish and a group fish, their trajectories were completely different. On the other hand, we defined the global and local perspective for the fish position in groups and found the degree of discrepancy between them resulted in different collective motions. Our results suggests inherent discrepancy inside the group enables them to have many options to behave. Finally, we found the asynchronic timing behaviors inside the flocks which would connect multiple functions in the group.

Research Products

• [Journal Article] 少数個体の鮎(Plecoglossus altivelis)が形成する群れとその個体数による振る舞いの変化 (2016)
  • Author(s): 新里高行, 村上久, 三具和希, 都丸武宣, 西山 雄大, 園田耕平, 郡司ペギオ幸夫
  • Journal Title: 計測自動制御学会論文集 Volume: 52(5) Pages: 257-263
  • NAID: 130005160630
  • Peer Reviewed
• [Journal Article] Information transfer in a swarm of soldier crabs (2016)
  • Author(s): Takenori Tomaru, Hisashi Murakami, Takayuki Niizato, Yuta Nishiyama, Kohei Sonoda, Toru Moriyama, Yukio-Pegio Gunji
  • Journal Title: Artificial Life and Robotics Volume: 21(2) Pages: 177-180
  • Peer Reviewed
• [Journal Article] Field of safe travel in swarm (2016)
  • Author(s): Kohei Sonoda, Hisashi Murakami, Takayuki Niizato, Yukio-Pegio Gunji
  • Journal Title: Artificial Life and Robotics Volume: 21(4) Pages: 379-383
  • Peer Reviewed
• [Journal Article] Fitness Network Model under Restricted Resources (2015)
  • Author(s): Niizato T and Gunji YP
  • Journal Title: Plos One Volume: 10(5) e0127284 Issue: 5 Pages: 1-17
  • DOI: 10.1371/journal.pone.0127284
  • Peer Reviewed / Open Access
• [Journal Article] Weak Identity from the Section-Retraction Perspective of Category Theory (2015)
  • Author(s): Takayuki Niizato
  • Journal Title: Artificial Life and Robotics Volume: 20 Pages: 166-172
  • Peer Reviewed
• [Journal Article] Following the Shadow beyond Pursuit and Escape Mechanism in the Swarm of Soldier Crabs (2015)
  • Author(s): Yukio Gunji, Hisashi Murakami, Takenori Tomaru, Takayuki Niizato
  • Journal Title: Proceedings of SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics. Volume: なし
  • Peer Reviewed
• [Journal Article] Schooling fish change internal movement strategy due to their density (2015)
  • Author(s): Hisashi Murakami, Takayuki Niizato, Takenori Tomaru, Yuta Nishiyama, and Yukio Gunji.
  • Journal Title: Proceedings of SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics. Volume: なし
  • Peer Reviewed
• [Journal Article] Field of Safe Travel in Swarm (2015)
  • Author(s): Kohei Sonoda, Hisashi Murakami, Takayuki Niizato, Yukio Gunji
  • Journal Title: Proceedings of SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics Volume: なし
  • Peer Reviewed
• [Journal Article] Difference in the searching strategy of Plecoglossus altivelis between single individuals and groups (2015)
  • Author(s): Takayuki Niizato, Hisashi Murakami, Kazuki Sangu, Takenori Tomaru, Yuta Nishiyama, Kohei Sonoda and Yukio Gunji
  • Journal Title: Proceedings of SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics Volume: なし
  • Peer Reviewed
• [Presentation] Local Perspectives of Plecoglossus altivelis Determine Searching Strategy (2016)
  • Author(s): Niizato T., Murakami H., Sangu K., Tomaru T., Sonoda K., Nishiyama Y. and Gunji Y.P
  • Organizer: The 2nd International Symposium on Artificial, Biological and Bio-Inspired Intelligence
  • Place of Presentation: Rodos Palace Hotel, Rhodes, Greece
  • Int'l Joint Research
• [Presentation] ミナミコメツキガニの群れに認められる逆ベイズ推論 (2015)
  • Author(s): 郡司ペギオ幸夫, 村上久, 都丸武宜, 新里高行
  • Organizer: 第16回計測自動制御学会システムインテグレーション部門講演会
  • Place of Presentation: 名古屋国際会議場(愛知県名古屋市)
  • Year and Date: 2015-12-15
• [Presentation] 非対称な接触による群れの行動 (2015)
  • Author(s): 園田耕平, 村上久, 新里高行, 飯塚浩二郎, 郡司ペギオ幸夫
  • Organizer: 第16回計測自動制御学会システムインテグレーション部門講演会
  • Place of Presentation: 名古屋国際会議場(愛知県名古屋市)
  • Year and Date: 2015-12-15
• [Presentation] 内的ゆらぎの群れ内情報伝達への貢献 (2015)
  • Author(s): 村上久, 新里高行, ，都丸武宜, 西山雄大, 郡司ペギオ幸夫
  • Organizer: 第16回計測自動制御学会システムインテグレーション部門講演会
  • Place of Presentation: 名古屋国際会議場(愛知県名古屋市)
  • Year and Date: 2015-12-15
• [Presentation] 群れが形成するネットワークからみる図地構造 (2015)
  • Author(s): 新里高行, 村上久, 三具和希, 都丸武典, 西山雄大, 園田耕平, 郡司ペギオ幸夫
  • Organizer: 第16回計測自動制御学会システムインテグレーション部門講演会
  • Place of Presentation: 名古屋国際会議場(愛知県名古屋市)
  • Year and Date: 2015-12-15
• [Presentation] Following the Shadow beyond Pursuit and Escape Mechanism in the Swarm of Soldier Crabs. (2015)
  • Author(s): Yukio Gunji, Hisashi Murakami, Takenori Tomaru, Takayuki Niizato
  • Organizer: SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics.
  • Place of Presentation: Kyoto University(Kyoto, Kyoto)
  • Year and Date: 2015-10-28
  • Int'l Joint Research
• [Presentation] Schooling fish change internal movement strategy due to their density (2015)
  • Author(s): Hisashi Murakami, Takayuki Niizato, Takenori Tomaru, Yuta Nishiyama, and Yukio Gunji
  • Organizer: SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics.
  • Place of Presentation: Kyoto University(Kyoto, Kyoto)
  • Year and Date: 2015-10-28
  • Int'l Joint Research
• [Presentation] Field of Safe Travel in Swarm (2015)
  • Author(s): Kohei Sonoda, Hisashi Murakami, Takayuki Niizato, Yukio Gunji.
  • Organizer: SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics.
  • Place of Presentation: Kyoto University(Kyoto, Kyoto)
  • Year and Date: 2015-10-28
  • Int'l Joint Research
• [Presentation] Difference in the searching strategy of Plecoglossus altivelis between single individuals and groups (2015)
  • Author(s): Takayuki Niizato, Hisashi Murakami, Kazuki Sangu, Takenori Tomaru, Yuta Nishiyama, Kohei Sonoda and Yukio Gunji
  • Organizer: SWARM 2015: The First International Symposium on Swarm Behavior and Bio-Inspired Robotics.
  • Place of Presentation: Kyoto University(Kyoto, Kyoto)
  • Year and Date: 2015-10-25
  • Int'l Joint Research
• [Presentation] 少数個体がつくるアユの群れに内在する相互作用構造 (2015)
  • Author(s): 新里高行, 村上久, 三具和希, 都丸武典, 西山雄大, 園田耕平, 郡司ペギオ幸夫
  • Organizer: 第53回生物物理学会
  • Place of Presentation: 金沢大学(石川県金沢市)
  • Year and Date: 2015-09-15