Abstract
Animals use stereo sampling of odor concentration to localize sources and follow odor trails. We analyze the dynamics of a bilateral model that depends on the simultaneous comparison between odor concentrations detected by left and right sensors. The general model consists of three differential equations for the positions in the plane and the heading. When the odor landscape is an infinite trail, we reduce the dynamics to a planar system whose dynamics has just two fixed points. Using an integrable approximation (for short sensors) we estimate the basin of attraction. In the case of a radially symmetric landscape, we again can reduce the dynamics to a planar system, but the behavior is considerably richer with multistability, isolas, and limit cycles. As in the linear trail case, there is also an underlying integrable system when the sensors are short. In odor landscapes that consist of multiple spots and trail segments, we find periodic and chaotic dynamics and characterize the behavior on trails with gaps and trails that turn corners.
Original language | English |
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Pages (from-to) | 100-120 |
Number of pages | 21 |
Journal | SIAM Review |
Volume | 63 |
Issue number | 1 |
DOIs | |
State | Published - 2021 |
Externally published | Yes |
Keywords
- Nonlinear dynamics
- Olfactory navigation
- Stereo sampling
- Tropotaxis