Sounds produced by the tucuxi (<i>Sotalia fluviatilis</i>) from the Napo and Aguarico rivers of Ecuador
AbstractThe acoustic structure and repertoire of the tucuxi (Sotalia fluviatilis) remain poorly studied. This lack of information limits our understanding of how acoustic signals evolved and the factors that promote variation across and within populations. Using a broadband recording system, we recorded 30 whistles from tucuxis in the Napo and Aguarico Rivers, Ecuador. Our results show that Ecuadorian tucuxis emit a variety of sounds including whistles, echolocation clicks, and pulse sounds. Whistles structure varied with respect to other populations described in previous studies, providing preliminary evidence of geographic variation. In addition, this study provides evidence of high order harmonics in whistles (up to 80kHz) highlighting the importance of broadband recording systems.
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).