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BP: Fachverband Biologische Physik

BP 10: Postersession II

BP 10.60: Poster

Montag, 12. März 2018, 17:30–19:30, Poster C

Neuronal model for startling coupled with a collective behavior model — •Andrej Warkentin¹ and Pawel Romanczuk^1,2 — ¹Bernstein Center for Computational Neuroscience, Humboldt Universität zu Berlin — ²Institute for Theoretical Biology, Department of Biology, Humboldt Universität zu Berlin

Many aspects of fish school behavior can be explained qualitatively by self-propelled agent models with social interaction forces that are based on either metric or topological neighborhoods. Recently, startling of fish has been analyzed in its dependence of the network structure [1] but a neurophysiological model and its influence on the collective behavior is missing. Here, we coupled a model for collective behavior with a neuronal model that receives looming visual stimulus input to initiate a startle response, inspired by the neurobiologically well-studied Mauthner cell system. First, we analyzed the basic properties of the startle behavior of a single fish as a reaction to one or multiple looming stimuli. On the group level, we looked at startling frequency and cascades as well as group cohesion, polarization and mobility depending on neuronal and collective behavior parameters via simulations of the combined model. Our results indicate that the startling frequency strongly depends on the dynamics of the group structure, e.g. when the group approaches a boundary of the arena. In summary, we took first steps towards a biologically plausible model for startle response initiation in the context of collective motion.

[1] Rosenthal, S. B., Twomey, C. R., Hartnett, A. T., Wu, H. S., and Couzin, I. D. (2015). PNAS, 112:4690-4695