Dear Colleagues,
My co-authors and I are pleased to announce the publication of the
following paper:
E. Papale, M. Azzolin, I. Cascão, A. Gannier, M.O. Lammers, V.M.
Martin, J. Oswald, M. Perez-Gil, R. Prieto, M.A. Silva & C. Giacoma.
Macro- and micro-geographic variation of short-beaked common dolphin’s
whistles in the Mediterranean Sea and Atlantic Ocean.
Ethology Ecology & Evolution (2013)
DOI: 10.1080/03949370.2013.851122
Genetic studies have shown that there are small but significant
differences between the short-beaked common dolphin populations in the
Atlantic Ocean and those in the Mediterranean Sea. The short-beaked
common dolphin is a highly vocal species with a wide sound production
repertoire including whistles. Whistles are continuous, narrowband,
frequency-modulated signals that can show geographic variation in
dolphin species. This study tests whether the differences, highlighted
by genetic studies, are recognisable in the acoustic features of
short-beaked common dolphin’s whistles in the two adjacent areas of the
Atlantic Ocean and the Mediterranean Sea. From a selected sample of good
quality whistles (514 recorded in the Atlantic and 193 in the
Mediterranean) 10 parameters of duration, frequency and frequency
modulation were measured. Comparing data among basins, differences were
found for duration and all frequency parameters except for minimum
frequency. Modulation parameters showed the highest coefficient of
variation. Through discriminant analysis we correctly assigned 75.7% of
sounds to their basins. Furthermore, micro-geographic analysis revealed
similarity between the sounds recorded around the Azores and the Canary
archipelagos and between the Bay of Biscay and the Mediterranean Sea.
Results are in agreement with the hypothesis proposed by previous
genetic studies that two distinct populations are present, still
supposing a gene flow between the basins. This study is the first to
compare short beaked common dolphin’s whistles of the Atlantic Ocean and
the Mediterranean areas.
The full article can be found online at:
http://www.tandfonline.com/doi/full/10.1080/03949370.2013.851122
Or http://www.tandfonline.com/eprint/Jgg75I6ZkbZN3X397i2M/full
Please contact me if you do not have access to the article
(elena.pap...@unito.it)
--
Elena Papale, PhD
Department of Life Science and Systems Biology
Univesity of Torino,
Via Accademia Albertina 13,
10123 Torino
Italy
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