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