BPCPPDYSOE21 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 25: Nonlinear Dynamics 2 - organized by Azam Gholami (Göttingen)
DY 25.6: Vortrag
Dienstag, 23. März 2021, 12:40–13:00, DYc
Information spread enhanced by criticality in high-responsive groups of fish — •Luis Gómez Nava1,3, Robert T. Lange2,3, Pascal P. Klamser1,2, Henning Sprekeler2,3, and Pawel Romanczuk1,3 — 1Institute for Theoretical Biology, Philippstrasse 13, Humboldt University of Berlin, 10115 Berlin, Germany — 2Bernstein Center for Computational Neuroscience, 10115 Berlin, Germany — 3Science of Intelligence (SCIoI), Marchstrasse 23, Technical University of Berlin, 10587 Berlin, Germany
Collective dynamics in animal groups has been studied in recent years intensively. Recent works have suggested that such multi-agent systems should operate in a special parameter region, close to critical points. This is relevant because critical systems exhibit unique properties like maximal responsiveness to external stimuli and optimal propagation of information within the group. In our work, we study a high-density system of sulphur mollies in their natural habitat. We measure the surface activity of the fish and characterize their response to external fluctuations. This surface activity results to be similar to the one observed in critical systems (we observe power law-distributed observables, as well as separation of time scales of the activity). We model the system dynamics using cellular automata and we conclude that this natural system operates indeed in a special parameter region. We provide as well a biological interpretation of the characteristic features of such a critical system.