http://www.cnr.it/ontology/cnr/individuo/prodotto/ID57525

Scale-free correlations in starling flocks (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Scale-free correlations in starling flocks (Articolo in rivista) (literal)

Anno

2010-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1073/pnas.1005766107 (literal)

Alternative label

Andrea Cavagna (a,b); Alessio Cimarelli (b); Irene Giardina (a,b); Giorgio Parisi (b,c,d); Raffaele Santagati (b); Fabio Stefanini (b); Massimiliano Viale (a,b) (2010)
Scale-free correlations in starling flocks
in Proceedings of the National Academy of Sciences of the United States of America; National Academy of Sciences, Washington (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Andrea Cavagna (a,b); Alessio Cimarelli (b); Irene Giardina (a,b); Giorgio Parisi (b,c,d); Raffaele Santagati (b); Fabio Stefanini (b); Massimiliano Viale (a,b) (literal)

Pagina inizio

11865 (literal)

Pagina fine

11870 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.pnas.org/content/109/13/4786 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

107 (literal)

Rivista

Proceedings of the National Academy of Sciences of the United States of America (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

fasc.(26).National Academy of Sciences. Include 4 pagine di Supporting Information. PNAS. (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

26 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

(a) Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, 00185 Rome, Italy (b) Dipartimento di Fisica, Università di Roma \"La Sapienza\", 00185 Rome, Italy (c) Sezione Istituto Nazionale di Fisica Nucleare, Università di Roma \"La Sapienza\", 00185 Rome, Italy (d) Unità Organizzativa di Supporto di Roma, Istituto per i Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche, 00185 Rome, Italy (literal)

Titolo

Scale-free correlations in starling flocks (literal)

Abstract

From bird flocks to fish schools, animal groups often seem to react to environmental perturbations as if of one mind. Most studies in collective animal behavior have aimed to understand how a globally ordered state may emerge from simple behavioral rules. Less effort has been devoted to understanding the origin of collective response, namely the way the group as a whole reacts to its environment. Yet, in the presence of strong predatory pressure on the group, collective response may yield a significant adaptive advantage. Here we suggest that collective response in animal groups may be achieved through scale-free behavioral correlations. By reconstructing the 3D position and velocity of individual birds in large flocks of starlings, we measured to what extent the velocity fluctuations of different birds are correlated to each other. We found that the range of such spatial correlation does not have a constant value, but it scales with the linear size of the flock. This result indicates that behavioral correlations are scale free: The change in the behavioral state of one animal affects and is affected by that of all other animals in the group, no matter how large the group is. Scale-free correlations provide each animal with an effective perception range much larger than the direct interindividual interaction range, thus enhancing global response to perturbations. Our results suggest that flocks behave as critical systems, poised to respond maximally to environmental perturbations. (literal)

Editore