Document Detail


Captive dolphins, Tursiops truncatus, develop signature whistles that match acoustic features of human-made model sounds.
MedLine Citation:
PMID:  12186052     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This paper presents a cross-sectional study testing whether dolphins that are born in aquarium pools where they hear trainers' whistles develop whistles that are less frequency modulated than those of wild dolphins. Ten pairs of captive and wild dolphins were matched for age and sex. Twenty whistles were sampled from each dolphin. Several traditional acoustic features (total duration, duration minus any silent periods, etc.) were measured for each whistle, in addition to newly defined flatness parameters: total flatness ratio (percentage of whistle scored as unmodulated), and contiguous flatness ratio (duration of longest flat segment divided by total duration). The durations of wild dolphin whistles were found to be significantly longer, and the captive dolphins had whistles that were less frequency modulated and more like the trainers' whistles. Using a standard t-test, the captive dolphin had a significantly higher total flatness ratio in 9/10 matched pairs, and in 8/10 pairs the captive dolphin had significantly higher contiguous flatness ratios. These results suggest that captive-born dolphins can incorporate features of artificial acoustic models made by humans into their signature whistles.
Authors:
Jennifer L Miksis; Peter L Tyack; John R Buck
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  112     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-08-20     Completed Date:  2002-10-17     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  728-39     Citation Subset:  IM    
Affiliation:
Biology Department, Woods Hole Oceanographic Institution, Massachusetts 02543, USA.
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MeSH Terms
Descriptor/Qualifier:
Animal Communication
Animals
Dolphins / psychology*
Female
Humans
Imitative Behavior
Male
Sound Spectrography*
Species Specificity
Speech Acoustics*
Vocalization, Animal*
Grant Support
ID/Acronym/Agency:
5R29 NS25290/NS/NINDS NIH HHS; R01 DC04191/DC/NIDCD NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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