Collective memory and spatial sorting in animal groups.

@article{Couzin2002CollectiveMA,
  title={Collective memory and spatial sorting in animal groups.},
  author={Iain D. Couzin and Jens Krause and Richard James and Graeme D. Ruxton and Nigel R. Franks},
  journal={Journal of theoretical biology},
  year={2002},
  volume={218 1},
  pages={
          1-11
        }
}
We present a self-organizing model of group formation in three-dimensional space, and use it to investigate the spatial dynamics of animal groups such as fish schools and bird flocks. We reveal the existence of major group-level behavioural transitions related to minor changes in individual-level interactions. Further, we present the first evidence for collective memory in such animal groups (where the previous history of group structure influences the collective behaviour exhibited as… 

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References

SHOWING 1-10 OF 45 REFERENCES
The Dynamics of Herds: From Individuals to Aggregations
Abstract The dynamic behavior of small herds is investigated by means of simulations of two-dimensional discrete-stochastic models. An individual-based approach is used to relate collective behavior
Complexity, pattern, and evolutionary trade-offs in animal aggregation.
One of the most striking patterns in biology is the formation of animal aggregations. Classically, aggregation has been viewed as an evolutionarily advantageous state, in which members derive the
DIFFERENTIAL FITNESS RETURNS IN RELATION TO SPATIAL POSITION IN GROUPS
  • Jens Krause
  • Environmental Science
    Biological reviews of the Cambridge Philosophical Society
  • 1994
TLDR
A general overview of position-related fitness differences in group-living animals is given for the first time and it is suggested that edge positions achieve a higher net-energy pay-off and should therefore be preferred by individuals with low energy reserves.
Mortality risk of spatial positions in animal groups: The danger of being in the front
We modified Hamilton's (1971) selfish herd model by introducing directional movement to the prey groups and the predators. The consequences of this modification with regards to differential predation
Flocks, herds and schools: A distributed behavioral model
TLDR
This paper explores an approach based on simulation as an alternative to scripting the paths of each bird individually, an elaboration of a particle systems, with the simulated birds being the particles.
The simulation of the movement of fish schools
A simulation study on the schooling mechanism in fish.
TLDR
It was found that group movements in unity could occur despite each indicidual lacking knowledge of movement of the entire school, and in the absence of a consistent leader.
Animal Groups in Three Dimensions: Analysis
TLDR
This book presents a meta-analyses of social forces in animal congregations in four developmental stages of Coullana canadensis and discusses the role of sensory integration systems in the modeling of biological aggregations.
The three-dimensional structure of airborne bird flocks
TLDR
The three-dimensional structure of flocks of dunlin, Calidris alpina, and starlings, Sturnus vulgaris, was studied while birds were in transit between feeding, loafing and roosting sites and it is indicated that dunlin have a tighter, more compact flock structure than do starlings.
...
...