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Critical population density triggers rapid formation of vast oceanic fish shoals
Makris, N.C.; Ratilal, P.; Jagannathan, S.; Gong, Z.; Andrews, M.; Bertsatos, I.; Godø, O.R.; Nero, R.W.; Jech, J.M. (2009). Critical population density triggers rapid formation of vast oceanic fish shoals. Science (Wash.) 323(5922): 1734-1737
In: Science (Washington). American Association for the Advancement of Science: Washington DC. ISSN 0036-8075, more
Peer reviewed article

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Keyword
    Marine

Authors  Top 
  • Makris, N.C.
  • Ratilal, P.
  • Jagannathan, S.
  • Gong, Z.
  • Andrews, M.
  • Bertsatos, I.
  • Godø, O.R., more
  • Nero, R.W.
  • Jech, J.M.

Abstract
    Similarities in the behavior of diverse animal species that form large groups have motivated attempts to establish general principles governing animal group behavior. It has been difficult, however, to make quantitative measurements of the temporal and spatial behavior of extensive animal groups in the wild, such as bird flocks, fish shoals, and locust swarms. By quantifying the formation processes of vast oceanic fish shoals during spawning, we show that (i) a rapid transition from disordered to highly synchronized behavior occurs as population density reaches a critical value; (ii) organized group migration occurs after this transition; and (iii) small sets of leaders significantly influence the actions of much larger groups. Each of these findings confirms general theoretical predictions believed to apply in nature irrespective of animal species.

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