Volume 74, Number 6, June 2006
|Page(s)||1095 - 1101|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||26 May 2006|
Long-term correlations in the surface behavior of dolphins
Dipartimento di Fisica, Università “La Sapienza” - Piazzale A. Moro 5 00185 Roma, Italy
2 University of Aberdeen, School of Biological Sciences - Lighthouse Field Station George St. Cromarty, Ross-shire, IV11 8YJ, Scotland, UK
Accepted: 26 April 2006
Here we study the sequences of surface behavioral patterns of dolphins (Tursiops sp.) and find long-term correlations. We show that the long-term correlations are not of a trivial nature, i.e. they cannot be explained by the repetition of the same surface behavior many times in a row. Our findings suggest that dolphins have a long collective memory extending back at least to the 7-th past behavior. As far as we know, this is the first evidence of long-term correlations in the behavior of a non-human species.
PACS: 87.23.Ge – Dynamics of social systems / 89.70.+c – Information theory and communication theory / 87.53.Wz – Monte Carlo applications
© EDP Sciences, 2006
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