Bioconvection is a form of collective motion that occurs spontaneously in the suspension of swimming microorganisms. In a previous study, we quantitatively described the "pattern transition," a phase transition phenomenon that so far has exclusive...
Azusa Kage   Chiharu Hosoya   Shoji A. Baba   Yoshihiro Mogami   
Journal of Experimental Biology 216(24) 4557-4566 2013年12月 [査読有り]
Motile aquatic microorganisms are known to self-organize into bioconvection patterns. The swimming activity of a population of microorganisms leads to the emergence of macroscopic patterns of density under the influence of gravity. Although long-t...
Bioconvection emerges in a dense suspension of swimming protists as a consequence of their negative-gravitactic upward migration and later settling as a blob of density greater than that of water. Thus, gravity is an important parameter governing ...
Chiharu Hosoya   Asuka Akiyama   Azusa Kage   Shoji A. Baba   Yoshihiro Mogami   
Biological Sciences in Space 24(3/4) 145-151 2010年12月 [査読有り]
Chlamydomonas is known to form bioconvection as the result of its gravitactic swimming behavior. Several mechanisms have been discussed as the main cause of the preferential reorientation of the microorganisms with respect to gravity vector...
Azusa Kage   Kohei Takahashi   Hisayoshi Nozaki   Tetsuya Higashiyama   Shoji A. Baba   Takayuki Nishizaka   
bioRxiv 2023年6月
Abstract
Eukaryotic flagella collectively form metachronal waves and exhibit the ability to swim or cause flow. Large volvocine genera such asEudorina, Pleodorina, andVolvoxform bundles of small male gametes (sperm) called “sperm packets” for sex...