Synchronisation and collective swimming patterns in Hemigrammus bleheri

I. Ashraf, R. Godoy-Diana, J. Halloy, B. Collignon, B. Thiria
Journal of the Royal Society Interface 13 20160734 (2016)

In this work, we address the case of red nose tetra fish Hemigrammus bleheri swimming in groups in a uniform flow, giving special attention to the basic interactions and cooperative swimming of a single pair of fish. We first bring evidence of synchronization of the two fish, where the swimming modes are dominated by ‘out-phase’ and ‘in-phase’ configurations. We show that the transition to this synchronization state is correlated with the swimming speed (i.e. the flow rate), and thus with the magnitude of the hydro- dynamic pressure generated by the fish body during each swimming cycle. From a careful spatio-temporal analysis corresponding to those synchronized modes, we
characterize the distances between the two individuals in a pair in the basic schooling pattern. We test the conclusions of the analysis of fish pairs with a second set of experiments using groups of three fish. By identifying the typical spatial configurations, we explain how the nearest neighbour interactions constitute the building blocks of collective fish swimming.

Haut de page

À lire aussi...

A non-local rheology for granular flows across yield conditions

M. Bouzid, M. Trulsson, P. Claudin, E. Clément and B. Andreotti, Phys. Rev. Lett. 111, 238301 (2013). The rheology of dense granular flows is (...) 

> Lire la suite...

Droplets move over viscoelastic substrates by surfing a ridge

Karpitschka S., Das S., van Gorcum M., Perrin H., Andreotti B. & Snoeijer J.H., Nature Comm., 6, 7891, (2015) Liquid drops on soft solids (...) 

> Lire la suite...


Informations Pratiques

Laboratoire : 01 40 79 45 22
Directeur : Philippe Petitjeans
Administratrice : Frédérique Auger (01 40 79 45 22)
Gestionnaire : Claudette Barez (01 40 79 58 53)
Courriel : dir (arobase)

Nous rendre visite