[MARMAM] New Publication: Geographic variability in striped dolphin’s whistles

Elena Papale elena.papale at unito.it
Thu Jan 31 02:40:30 PST 2013


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 at unito.it)


-- 
Elena Papale, PhD
Department of Life Science and Systems Biology
Univesity of Torino,
Via Accademia Albertina 13,
10123 Torino
Italy
elena.papale at unito.it


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