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Area of Science:

  • * Collective behaviour
  • * Biomechanics
  • * Sensory ecology

Background:

  • * Collective behaviour models predict group dynamics in schools, flocks, and herds.
  • * Current models often use biologically unrealistic sensory assumptions across species.
  • * The impact of these sensory assumptions on model predictions is not well understood.

Purpose of the Study:

  • * To investigate the sensitivity of collective behaviour models to sensory assumptions.
  • * To compare classic sensory parameters with realistic, physiologically derived parameters.
  • * To assess how altered perceptual ranges affect group structure and dynamics.

Main Methods:

  • * Utilized metric and topological collective behaviour models.
  • * Incorporated parameters for visual coverage and visual acuity.
  • * Compared standard sensory parameters (e.g., for birds, fish) with parameters from physiological measurements.

Main Results:

  • * Realistic sensory parameters significantly increased perceptual ranges compared to classic assumptions.
  • * This led to fewer, larger groups across all simulated species.
  • * Fish species exhibited higher polarity and slightly shorter neighbour distances with realistic parameters.

Conclusions:

  • * Classic visual sensory assumptions in collective behaviour models are often unrealistic.
  • * These assumptions unrealistically constrain perceptual ranges, impacting model predictions.
  • * Caution is advised when empirically testing model predictions due to species-specific sensory differences.