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    Macro- and micro-geographic variation of short-beaked common dolphin’s whistles in the Mediterranean Sea and Atlantic Ocean

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    Papale et al 2014_Macro and micro geographic variation.pdf (525.9Kb)
    Date
    2013-09
    Author
    Papale, E.  Concept link
    Azzolin, M.  Concept link
    Cascao, Irma  Concept link
    Gannier, A.  Concept link
    Lammers, Marc O.  Concept link
    Martin, V. M.  Concept link
    Oswald, Julie N.  Concept link
    Perez-Gil, M.  Concept link
    Prieto, Rui  Concept link
    Silva, Monica A.  Concept link
    Giacoma, C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/6912
    As published
    https://doi.org/10.1080/03949370.2013.851122
    Keyword
     Short-beaked common dolphin; Intra-specific differences; Geographic variation; Mediterranean; Atlantic; Whistles 
    Abstract
    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 shortbeaked common dolphin’s whistles of the Atlantic Ocean and the Mediterranean areas.
    Description
    Author Posting. © The Author(s), 20113. This is the author's version of the work. It is posted here by permission of Taylor & Francis for personal use, not for redistribution. The definitive version was published in Ethology Ecology & Evolution 26 (2014): 392-404, doi:10.1080/03949370.2013.851122.
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    • Biology
    Suggested Citation
    Preprint: Papale, E., Azzolin, M., Cascao, Irma, Gannier, A., Lammers, Marc O., Martin, V. M., Oswald, Julie N., Perez-Gil, M., Prieto, Rui, Silva, Monica A., Giacoma, C., "Macro- and micro-geographic variation of short-beaked common dolphin’s whistles in the Mediterranean Sea and Atlantic Ocean", 2013-09, https://doi.org/10.1080/03949370.2013.851122, https://hdl.handle.net/1912/6912
     

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