Guyana dolphins (Sotalia guianensis) from Costa Rica emit whistles that vary with surface behaviors

Guyana dolphins show remarkable intraspecific whistle variation. This variation has been largely explained in terms of distance among populations; however, other factors such as behavior may also be important. A broadband recording system recorded the whistles of Guyana dolphins under three behavior...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2013-10, Vol.134 (4), p.EL359-EL365
Main Author: May-Collado, Laura J
Format: Article
Language:English
Subjects:
Animals
Costa Rica
Discriminant Analysis
Dolphins - physiology
Feeding Behavior
Signal Processing, Computer-Assisted
Social Behavior
Sound Spectrography
Species Specificity
Swimming
Time Factors
Vocalization, Animal
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Summary:Guyana dolphins show remarkable intraspecific whistle variation. This variation has been largely explained in terms of distance among populations; however, other factors such as behavior may also be important. A broadband recording system recorded the whistles of Guyana dolphins under three behavioral states. A discriminant analysis found that during social and travel events, dolphins emit whistles with high delta and minimum frequency, respectively. Whistle duration was also important in discriminating behaviors. This study indicates that behavior is an important factor contributing to whistle variation of Guyana dolphins. Understanding how dolphin whistles vary with behavioral context will advance our understanding of dolphin communication and enable appropriate comparative studies.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4818938