October 28 at 10:00 - 11:00, 2021 (JST)
Prof. Ikkyu Aihara (Associate Professor, Faculty of Engineering, Information and Systems, University of Tsukuba)
via Zoom

Male frogs produce sounds to attract conspecific females as well as advertise their own territories to other males. Subsequently male frogs acoustically interact with each other, which induces various types of synchronized behavior. In this seminar, I will introduce the synchronized calling behavior of actual male frogs as well as theoretical studies using a phase oscillator model [1, 2]. Next, I will introduce our recent projects on the identification of the phase oscillator model from empirical data [3] and the extension of the model to a hybrid dynamical system in which male frogs intermittently switch their behavioral mode based on internal condition and also the interaction with other males [4].


  1. Ikkyu Aihara, Ryu Takeda, Takeshi Mizumoto, Takuma Otsuka, Toru Takahashi, Hiroshi G. Okuno, and Kazuyuki Aihara, "Complex and transitive synchronization in a frustrated system of calling frogs", Phys. Rev. E 83.031913 (2011), doi: 10.1103/PhysRevE.83.031913
  2. Ikkyu Aihara, Takeshi Mizumoto, Takuma Otsuka, Hiromitsu Awano, Kohei Nagira, Hiroshi G. Okuno and Kazuyuki Aihara, "Spatio-Temporal Dynamics in Collective Frog Choruses Examined by Mathematical Modeling and Field Observations" ,Scientific Reports (2014), doi: 10.1038/srep03891
  3. Kaiichiro Ota, Ikkyu Aihara and Toshio Aoyagi, "Interaction mechanisms quantified from dynamical features of frog choruses", Royal Society Open Science Volume 7(2020), doi: 10.1098/rsos.191693
  4. Ikkyu Aihara, Daichi Kominami, Yasuharu Hirano and Masayuki Murata, "Mathematical modelling and application of frog choruses as an autonomous distributed communication system", Royal Society Open Science Volume 6 (2019), doi: 10.1098/rsos.181117

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