The Library
Whirligig beetles as corralled active Brownian particles
Tools
Tools
Tools
Devereux, Harvey L., Twomey, Colin R., Turner, Matthew S. and Thutupalli, Shashi (2021) Whirligig beetles as corralled active Brownian particles. Journal of The Royal Society Interface, 18 (177). 20210114. doi:10.1098/rsif.2021.0114
|
PDF
WRAP-Whirligig-beetles-corralled-active-Brownian-particles-Turner-2021.pdf - Accepted Version - Requires a PDF viewer. Download (16Mb) | Preview |
Official URL: http://dx.doi.org/10.1098/rsif.2021.0114
Abstract
We study the collective dynamics of groups of whirligig beetles Dineutus discolor (Coleoptera: Gyrinidae) swimming freely on the surface of water. We extract individual trajectories for each beetle, including positions and orientations, and use this to discover (i) a density-dependent speed scaling like v ∼ ρ−ν with ν ≈ 0.4 over two orders of magnitude in density (ii) an inertial delay for velocity alignment of approximately 13 ms and (iii) coexisting high and low-density phases, consistent with motility-induced phase separation (MIPS). We modify a standard active Brownian particle (ABP) model to a corralled ABP (CABP) model that functions in open space by incorporating a density-dependent reorientation of the beetles, towards the cluster. We use our new model to test our hypothesis that an motility-induced phase separation (MIPS) (or a MIPS like effect) can explain the co-occurrence of high- and low-density phases we see in our data. The fitted model then successfully recovers a MIPS-like condensed phase for N = 200 and the absence of such a phase for smaller group sizes N = 50, 100.
| Item Type: | Journal Article | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QL Zoology | |||||||||||||||||||||||||||
| Divisions: | Faculty of Science > Mathematics Faculty of Science > Physics |
|||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Gyrinidae , Biology -- Mathematical models, Brownian motion processes, Insects -- Behavior | |||||||||||||||||||||||||||
| Journal or Publication Title: | Journal of The Royal Society Interface | |||||||||||||||||||||||||||
| Publisher: | The Royal Society Publishing | |||||||||||||||||||||||||||
| ISSN: | 1742-5689 | |||||||||||||||||||||||||||
| Official Date: | 14 April 2021 | |||||||||||||||||||||||||||
| Dates: |
|
|||||||||||||||||||||||||||
| Volume: | 18 | |||||||||||||||||||||||||||
| Number: | 177 | |||||||||||||||||||||||||||
| Article Number: | 20210114 | |||||||||||||||||||||||||||
| DOI: | 10.1098/rsif.2021.0114 | |||||||||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
