New Publication: Geographic variability in striped dolphin’s whistles
Dear Colleagues, My co-authors and I are pleased to announce the publication of the following paper in the Journal of the Acoustical Society of America: Papale, E., Azzolin, M., Cascão, I., Gannier, A., Lammers, M.O., Martin, V.M., Oswald, J., Perez-Gil, M., Prieto, R., Silva, M.A., Giacoma, C. 2013. Geographic variability in the acoustic parameters of striped dolphin’s (Stenella coeruleoalba) whistles. J. Acoust. Soc. Am. 133 (2), 1126–1134 ABSTRACT: Geographic variation in the acoustic features of whistles emitted by the striped dolphin (Stenella coeruleoalba) from the Atlantic Ocean (Azores and Canary Islands) and the Mediterranean was investigated. Ten parameters (signal duration, beginning, end, minimum and maximum frequency, the number of inflection points, of steps, of minima and maxima in the contour and the frequency range) were extracted from each whistle. Discriminant function analysis correctly classified 73% of sounds between Atlantic Ocean and Mediterranean Sea. A cline in parameters was apparent from the Azores to the Mediterranean, with a major difference between the Canaries and the Mediterranean than between Azores and Canaries. Signal duration, maximum frequency, and frequency range measured in the Mediterranean sample were significantly lower compared to those measured in the Atlantic. Modulation parameters played a considerable role in area discrimination and were the only parameters contributing to highlight the differences within the Atlantic Ocean. Results suggest that the acoustic features constrained by structural phenotype, such as whistle’s frequency parameters, have a major effect on the Atlantic and Mediterranean separation while behavioural context, social, and physical environment may be among the main factors contributing to local distinctiveness of Atlantic areas. These results have potential passive acoustic monitoring applications. 2013 Acoustical Society of America. [http://dx.doi.org/10.1121/1.4774274] The full article can be found online at: http://link.aip.org/link/?JAS/133/1126 Please contact me if you do not have access to the article (elena.papale@unito.it) -- Elena Papale, PhD Department of Life Science and Systems Biology Univesity of Torino, Via Accademia Albertina 13, 10123 Torino Italy elena.papale@unito.it
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Elena Papale