We present a minimal model to describe the onset of collective motion seen when a population of locusts are placed in an annular arena. At low densities motion is disordered, while at high densities locusts march in a common direction, which may reverse during the experiment. The data is well-captured by an individual-based model, in which demographic noise leads to the observed density-dependent effects. By fitting the model parameters to equation-free coefficients, we give a quantitative comparison, showing time series, stationary distributions and the mean switching times between states.
- Locusts, inherent, noise, coherence, swarm, motion, collective, switching
Dyson, L., Yates, C., McKane, A., & Buhl, J. (2015). Onset of collective motion in locusts is captured by a minimal model. Physical Review E, 92(5), . https://doi.org/10.1103/PhysRevE.92.052708