Journal of Aero Aqua Bio-mechanisms
Online ISSN : 2185-1522
ISSN-L : 2185-1522
Original Papers
Analysis of the velocity correlation in the collective motion of bacteria
Tonau NakaiYoshihiro MouriTomonobu Goto
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2015 Volume 4 Issue 1 Pages 32-36


To elucidate the characteristics of flow in the collective motion of bacteria, we performed microscopic observation of the cells cultured on a semi-fluid medium. The collective motion occurs when the average cell-cell distance decreases to 5 μm, almost the same as the size of the cell. The standard deviation of the angle between velocity vectors represents the degree of collective motion well. The characteristic size of the swarming group is deduced by the analysis of the correlation with respect to the direction parallel and perpendicular to the swimming direction; 30 μm in length and 10 μm in width.

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© 2015 Society of Aero Aqua Bio-mechanisms
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