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Adaptation-induced collective dynamics of a single-cell protozoan

Ogata, M., Hondou, T., Hayakawa, Y., Hayashi, Y. and Sugawara, K. (2008) Adaptation-induced collective dynamics of a single-cell protozoan. Physical Review E, 77. 011917. ISSN 1550-2376

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To link to this item DOI: 10.1103/PhysRevE.77.011917


We investigate the behavior of a single-cell protozoan in a narrow tubular ring. This environment forces them to swim under a one-dimensional periodic boundary condition. Above a critical density, single-cell protozoa aggregate spontaneously without external stimulation. The high-density zone of swimming cells exhibits a characteristic collective dynamics including translation and boundary fluctuation. We analyzed the velocity distribution and turn rate of swimming cells and found that the regulation of the turing rate leads to a stable aggregation and that acceleration of velocity triggers instability of aggregation. These two opposing effects may help to explain the spontaneous dynamics of collective behavior. We also propose a stochastic model for the mechanism underlying the collective behavior of swimming cells.

Item Type:Article
Divisions:Life Sciences > School of Biological Sciences > Department of Bio-Engineering
ID Code:30816
Publisher:American Physical Society


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