[MARMAM] New Publication: Evidence for signature whistles in Guiana dolphins

Alice Lima alimoulima at gmail.com
Fri Dec 5 03:04:27 PST 2014

We are pleased to announce a new publication in the Journal of The
Acoustical Society of America:

Evidence for signature whistles in Guiana dolphins (Sotalia guianensis) in
Ilhéus, northeastern Brazil
Alice Lima
 and Yvonnick Le Pendu
J. Acoust. Soc. Am. 136, 3178 (2014); http://dx.doi.org/10.1121/1.4900829

The paper is available online:

Please contact me if you would like a copy and do not otherwise have access
to the pdf: alimoulima at gmail.com

Signature whistles have been widely studied in bottlenose dolphins (*Tursiops
truncatus*). A recent study suggested the occurrence of signature whistles
in Guiana dolphins (*Sotalia guianensis*) but could not identify the
whistlers. The objective of this study is to describe the whistle
characteristics in the population of S. guianensis from Ilheus and
investigate the occurrence of signature whistles.
Dolphins from 55 groups were photographed and sound emissions from 21
groups were recorded. The frequency parameters and duration of the 847
recorded whistles were similar to those recorded in 12 other populations,
on an intermediate position of a latitudinal gradient. The visual
classification method was applied to the spectrograms of 68 stereotyped
potential signature whistles. Five out of 6 human judges agreed on the
formation of 13 groups. The presence of the same individuals in different
recording occasions of stereotyped whistles suggests that some whistle
types are produced by specific individuals. The study is the first to use
the photo-identification technique to iden- tify Guiana dolphins emitting
whistles and the results reinforce the hypothesis of signature whistles in
this species.

Alice de Moura Lima
Bióloga - CRBIO 92.034/05-D
Mestre em Zoologia - PPGZOO/UESC
Doctorante / PhD Student
Université de Rennes 1
UMR CNRS 6552 "Ethologie Animale et Humaine"
Station Biologique de Paimpont
35380 Paimpont
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