Assessing geographical variation on whistle acoustic structure of three Mediterranean populations of common bottlenose dolphin (Tursiops truncatus)

Gianluca Sara', Nikolina Rako Gospić, Gabriella La Manna, Marta Picciulin, Michele Manghi

Risultato della ricerca: Article

1 Citazioni (Scopus)

Abstract

Whistles are acoustic signals produced particularly during social interactions. Here, we compare whistles by bottlenose dolphins from three Mediterranean areas (Croatia, Sicily and Sardinia) to investigate the presence of acoustic divergence and to discuss the possible causes of variability. Whistle parameters differ significantly between populations, but PCA highlights that the majority of variability is due to a limited number of frequency parameters. Cluster and DFA show that the Croatian population is acoustically divergent from the western populations of Sicily and Sardinia. This divergence could be consistent with geographical isolation, and a possible genetic differentiation between populations, and/or an adaptation to the acoustic environment. Moreover, in a comparison of whistle parameters of different Mediterranean populations with those of previously published Atlantic populations, it was revealed that the Sicilian population was acoustically closer to Atlantic populations. Our results represent a contribution to identifying acoustically differentiated populations of bottlenose dolphins in the Mediterranean.
Lingua originaleEnglish
pagine (da-a)583-607
Numero di pagine25
RivistaBehaviour
Volume154
Stato di pubblicazionePublished - 2017

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All Science Journal Classification (ASJC) codes

  • Animal Science and Zoology
  • Behavioral Neuroscience

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