Postpartum whistle production in bottlenose dolphins
MetadataShow full item record
KeywordBottlenose dolphin; Tursiops truncatus; Vocal behavior; Mother-infant; Signature whistles; Imprinting
Despite much research on bottlenose dolphin signature whistles, few have investigated the role of maternal whistles in early calf development. We investigated maternal whistle use in the first weeks postpartum for captive dolphins. The overall whistling rate increased by a factor of ten when the calves were born and then decreased again in the third week of the one surviving calf. Adult whistles were distinguished from calf whistles based on the extent of frequency modulation and were further classified into signature and non-signature whistles by comparison to a dictionary of known whistles. The average rate of maternal signature whistle production increased significantly from 0.02 whistles per dolphin-minute before the calves were born to 0.2 and 0.3 whistles in weeks 1 and 2, decreasing again to 0.06 in week 3 for the mother of the surviving calf. Percent maternal signature whistles changed similarly. Signature whistle production by non-mothers did not change when the calves were born. A likely function of this increase in maternal signature whistle production is that it enables the calf to learn to identify the mother in the first weeks of life.
Author Posting. © Society for Marine Mammalogy, 2008. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Marine Mammal Science 24 (2008): 479-502, doi:10.1111/j.1748-7692.2008.00195.x.
Suggested CitationPreprint: Fripp, Deborah R., Tyack, Peter L., "Postpartum whistle production in bottlenose dolphins", 2007-11, https://doi.org/10.1111/j.1748-7692.2008.00195.x, https://hdl.handle.net/1912/2830
Showing items related by title, author, creator and subject.
Watwood, Stephanie Lynn (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-09)Male dolphins form stable, long-term alliances comparable to long-term relationships formed by terrestrial species. The goal of this thesis was to determine the effect of the formation of these alliances on vocal ...
Esch, H. Carter; Sayigh, Laela S.; Wells, Randall S. (2009-01-06)Bottlenose dolphins (Tursiops truncatus) produce individually distinctive vocalizations called signature whistles, first described by Melba and David Caldwell (1965). The Caldwells observed that isolated, captive dolphins ...
Development and functions of signature whistles of free-ranging bottlenose dolphins, Tursiops truncatus Sayigh, Laela S. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-09)This thesis presents data on the development and functions of individually distinctive signature whistles of free-ranging bottlenose dolphins, Tursiops tnmcatus. Research was conducted at a study site near Sarasota, ...