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SUMMARY:Using neuronal models to capture burst and glide motion and leader
 ship in fish - Linnéa Gyllingberg (Uppsala University)
DTSTART:20230808T133000Z
DTEND:20230808T135000Z
UID:TALK201499@talks.cam.ac.uk
DESCRIPTION:While mathematical models\, in particular self-propelled parti
 cle (SPP) models\, capture many of the observed properties of large fish s
 chools\, they do not always capture the interactions of smaller shoals. No
 r do these models tend to account for the observation that\, when swimming
  alone or in smaller groups\, many species of fish use intermittent locomo
 tion\, often referred to as burst and coast or burst and glide. Recent emp
 irical studies have suggested that burst and glide movement are indeed piv
 otal to the social interactions of individual fish. In this paper\, we pro
 pose a model of social burst and glide motion by combining a well-studied 
 model of neuronal dynamics\, the FitzHugh-Nagumo model\, with a model of f
 ish motion. We begin by showing that the model can capture the motion of a
  single fish swimming down a channel. By then extending to a two fish mode
 l\, where visual stimuli of the position of the other fish affects the int
 ernal burst or glide state of the fish\, we find that our model captures a
  rich set of swimming dynamics found in many species of fish. These includ
 e: leader-follower behaviour\; periodic changes in leadership\; apparently
  random (i.e. chaotic) leadership change\; and pendulum-like tit-for-tat t
 urn taking. Unlike SPP models\, which assume that fish move at a constant 
 speed\, the model produces realistic motion of individual fish. Moreover\,
  unlike previous studies where a random component is used for leadership s
 witching to occur\, we show that leadership switching\, both periodic and 
 chaotic\, can be the result of a deterministic interaction. We give severa
 l empirically testable predictions on how fish interact and discuss our re
 sults in light of recently established correlations between fish locomotio
 n and brain activity.
LOCATION:Seminar Room 1\, Newton Institute
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