Selective social interactions and speed-induced leadership in schooling fish

• 成果类型: Article
• 署名作者: Puy, Andreu; Gimeno, Elisabet; Torrents, Jordi; Bartashevich, Palina; Miguel, M. Carmen; Pastor-Satorras, Romualdo; Romanczuk, Pawel
• 署名单位: Universitat Politecnica de Catalunya; University of Barcelona; Humboldt University of Berlin; Technical University of Berlin; University of Barcelona
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-12601
• DOI: 10.1073/pnas.2309733121
• 发表日期: 2024-04-30
• 关键词: collective behavior; DYNAMICS; networks; motion; rules

摘要

Animals moving together in groups are believed to interact among each other with effective social forces, such as attraction, repulsion, and alignment. Such forces can be inferred using force maps, i.e., by analyzing the dependency of the acceleration of a focal individual on relevant variables. Here, we introduce a force map technique suitable for the analysis of the alignment forces experienced by individuals. After validating it using an agent -based model, we apply the force map to experimental data of schooling fish. We observe signatures of an effective alignment force with faster neighbors and an unexpected antialignment with slower neighbors. Instead of an explicit antialignment behavior, we suggest that the observed pattern is the result of a selective attention mechanism, where fish pay less attention to slower neighbors. This mechanism implies the existence of temporal leadership interactions based on relative speeds between neighbors. We present support for this hypothesis both from agent -based modeling as well as from exploring leader-follower relationships in the experimental data.