NDLI: Signature-whistle production in undisturbed free-ranging bottlenose dolphins (Tursiops truncatus).

Content Provider	PubMed Central
Author	Cook, Mandy L. H. Sayigh, Laela S. Blum, James E. Wells, Randall S.
Abstract	Data from behavioural observations and acoustic recordings of free-ranging bottlenose dolphins (Tursiops truncatus) were analysed to determine whether signature whistles are produced by wild undisturbed dolphins, and how whistle production varies with activity and group size. The study animals were part of a resident community of bottlenose dolphins near Sarasota, Florida, USA. This community of dolphins provides a unique opportunity for the study of signature-whistle production, since most animals have been recorded during capture-release events since 1975. Three mother-calf pairs and their associates were recorded for a total of 141.25 h between May and August of 1994 and 1995. Whistles of undisturbed dolphins were compared with those recorded from the same individuals during capture-release events. Whistles were conservatively classified into one of four categories: signature, probable signature, upsweep or other. For statistical analyses, signature and probable signature whistles were combined into a 'signature' category; upsweep and other whistles were combined into a 'non-signature' category. Both 'signature' and 'non-signature' whistle frequencies significantly increased as group size increased. There were significant differences in whistle frequencies across activity types: both 'signature' and 'non-signature' whistles were most likely to occur during socializing and least likely to occur during travelling. There were no significant interactions between group size and activity type. Signature and probable signature whistles made up ca. 52% of all whistles produced by these free-ranging bottlenose dolphins.
Related Links	http://dx.doi.org/10.1098/rspb.2003.2610
Ending Page	1049
Page Count	7
Starting Page	1043
File Format	PDF
ISSN	09628452
e-ISSN	14712954
Journal	Proceedings of the Royal Society B: Biological Sciences
Issue Number	1543
Volume Number	271
Language	English
Publisher Date	2004-05-22
Access Restriction	Open
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Immunology and Microbiology(all) Agricultural and Biological Sciences(all) Environmental Science(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Immunology and Microbiology Medicine Biochemistry, Genetics and Molecular Biology Environmental Science Agricultural and Biological Sciences

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