WIT Press

Experimental evidences for chaotic dynamics in the vocalizations of the humpback whale megaptera novaeangliae

Price

Free (open access)

Paper DOI

10.2495/ECO-V1-N2-180-188

Volume

Volume 1 (2006), Issue 2

Pages

8

Page Range

180 - 188

Author(s)

A. Facchini, F. Delogu, L. Lambroni, F.M. Pulselli, E.B.P. Tiezzi

Abstract

Vocalizations of the humpback whale Megaptera novaeangliae were investigated using the methods of the nonlinear time series analysis. Results show that the sound emissions are characterized by a combination of regular and irregular dynamic behaviors, the latter were characterized in terms of the maximum Lyapunov exponent and the Kaplan—Yorke dimension, while by the computation of the Lyapunov spectrum, a hyperchaotic attractor was found.

Keywords

nonlinear phenomena in animal vocalization, chaos, nonlinear time series analysis