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 <http://scitation.aip.org/content/asa/journal/jasa/136/6/10.1121/1.4900829> Alice Lima <http://scitation.aip.org/search?value1=Alice+Lima&option1=author&noRedirect=true> and Yvonnick Le Pendu <http://scitation.aip.org/search?value1=Yvonnick+Le+Pendu&option1=author&noRedirect=true> J. Acoust. Soc. Am. 136, 3178 (2014); http://dx.doi.org/10.1121/1.4900829 The paper is available online: *http://scitation.aip.org/content/asa/journal/jasa/136/6/10.1121/1.4900829 <http://scitation.aip.org/content/asa/journal/jasa/136/6/10.1121/1.4900829>* Please contact me if you would like a copy and do not otherwise have access to the pdf: alimoulima@gmail.com Abstract: 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