Foundation of Science of Animal groups

2015 Fiscal Year Final Research Report

• Project/Area Number: 26610114
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Mathematical physics/Fundamental condensed matter physics
• Research Institution: Kyoto University
• Principal Investigator: Sakagami Masaaki 京都大学, 人間・環境学研究科(研究院), 教授 (70202083)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 群 / 動画解析 / Optical flow / agitation / クラスター形成

Outline of Final Research Achievements

For the foundation of science of animal groups, we investigate mechanism of swift response in fish schools by analyzing the moving images filmed from the bottom of a tank of an aquarium. Through using velocity vector data measured by a method with optical flow, we review reliability of the analysis based on averaging over``cakecut'' regions around a torus center.
We show that agitation and burst, both of which have the significant role for swift reaction of fish schools,can be quantitatively detected by observing propagations of wave over neighboring cakecuts regions.Existence and importance of weak agitation, which is modest type of agitation, are suggested.

Free Research Field

物理学，群の科学