Effectiveness of Allelomimesis of Individuals in Dynamical Response of Fish School to Emergent Affairs (数理モデル化と応用)

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概要

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• A simulation model of collective motion of a fish group was presented to investigate the role of allelomimesis of fish individual in emergence of dynamically stable schooling behaviors. The present model was formulated based on the individual decision-making approach. Allelomimesis, doing what your neighbors do, was considered as the essential tactic of decision-making by which coherent collective behaviors such as schooling are generated. Besides the allelomimetic actions of individuals, the collision avoidance actions are also another essential tactic. As a measure of the tactic of decision-making, the ratio of contributions of allelomimetic and avoidance actions is adopted. It was investigated changing systematically value of the contribution ratio how and to what extent fish individuals mimic their neighbors so that the fish group shows the schooling behaviors. It was shown that the schooling behaviors generated using the optimal values of the ratio correspond to a self-organized critical state. The main purpose of the present modeling is to investigate whether the tactic of individual decision-making suited to generate good schooling behaviors works well also in maintaining dynamical stability of the fish school under emergent affairs. Emergent splitting of a school into two groups and flash expansion of a school were used as the emergent affairs. The extent of dynamical stability of a school was evaluated using two kinds of measures, the recovery time period and the critical distance of splitting or expansion. It was found that the tactic suitable for schooling generates the dynamically stable response of the school to emergent affairs.

• 一般社団法人情報処理学会の論文
• 2001-12-15

著者

• Hoshino Osamu

  Department Of Human Welfare Engineering Oita University

• Kambara T

  Graduate School Of Information Systems University Of Electro-communications:department Of Applied Ph

• Kambara Takeshi

  Graduate School Of Pharmaceutical Sciences Kyoto University

• ZHENG MEIHONG

  Graduate School of Information Systems, University of Electro-Communications

• NARITA YOSHIMASA

  Department of Applied Physics and Chemistry, University of Electro-Communications

• KASHIMORI YOSHIKI

  Department of Applied Physics and Chemistry, University of Electro-Communications

• Narita Yoshimasa

  Department Of Applied Physics And Chemistry University Of Electro-communications:(present Address)de

• Kashimori Y

  Univ. Electro‐communications Tokyo Jpn

• Kashimori Yoshiki

  Department Of Applied Physics And Chemistry University Of Electro-communications

• Zheng Meihong

  Graduate School Of Information Systems University Of Electro-communications

• Kambara Takeshi

  Graduate School of Information Systems, University of Electro-Communications:Department of Applied Physics and Chemistry, University of Electro-Communications

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