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
([email protected])
--
Elena Papale, PhD
Department of Life Science and Systems Biology
Univesity of Torino,
Via Accademia Albertina 13,
10123 Torino
Italy
[email protected]
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