Adaptation-induced collective dynamics of a single-cell protozoan

Ogata, M., Hondou, T., Hayakawa, Y., Hayashi, Y. ORCID: https://orcid.org/0000-0002-9207-6322 and Sugawara, K. (2008) Adaptation-induced collective dynamics of a single-cell protozoan. Physical Review E, 77. 011917. ISSN 1550-2376 doi: 10.1103/PhysRevE.77.011917

Abstract/Summary

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
URI	https://reading-clone.eprints-hosting.org/id/eprint/30816
Identification Number/DOI	10.1103/PhysRevE.77.011917
Refereed	Yes
Divisions	Life Sciences > School of Biological Sciences > Department of Bio-Engineering
Publisher	American Physical Society
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