Efficient survival strategy for zooplankton in turbulence
arXiv:2309.09641 · doi:10.1103/PhysRevResearch.6.L022034
Abstract
Zooplankton in a quiescent environment can detect predators by hydrodynamic sensing, triggering powerful escape responses. Since turbulent strain tends to mask the hydrodynamic signal, the organisms should avoid such regions, but it is not known how they accomplish this. We found a simple, robust, and highly efficient strategy, that relies on measuring the sign of gradients of squared strain. Plankton following this strategy show very strong spatial clustering, and align against the local flow velocity, facilitating mate finding and feeding. The strategy has the potential to reconcile competing fitness pressures.
References in corpus (17)
- A public turbulence database cluster and applications to study Lagrangian evolution of velocity increments in turbulence
- Flow Navigation by Smart Microswimmers via Reinforcement Learning
- Statistical models for spatial patterns of heavy particles in turbulence
- Zermelo's problem: Optimal point-to-point navigation in 2D turbulent flows using Reinforcement Learning
- Machine learning strategies for path-planning microswimmers in turbulent flows
- Optimal steering of a smart active particle
- Preferential sampling and small-scale clustering of gyrotactic microswimmers in turbulence
- Hydrodynamics can Determine the Optimal Route for Microswimmer Navigation
- Statistical models for the dynamics of heavy particles in turbulence
- Navigation of micro-swimmers in steady flow: the importance of symmetries
- Alignment of non-spherical active particles in chaotic flows
- Surfing on turbulence: a strategy for planktonic navigation
- Long-distance migration with minimal energy consumption in a thermal turbulent environment
- Microplankton life histories revealed by holographic microscopy and deep learning
- A Lagrangian model of copepod dynamics: Clustering by escape jumps in turbulence
- Energetic cost of microswimmer navigation: the role of body shape
- Alignment of elongated swimmers in a laminar and turbulent Kolmogorov flow