Sex difference in signature whistle production of free-ranging bottlenose dolphins,Tursiops truncates |
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| Authors: | Laela S Sayigh Peter L Tyack Randall S Wells Michael D Scott A Blair Irvine |
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| Institution: | (1) Biological Sciences, University of North Carolina at Wilmington, 28403 Wilmington, NC, USA;(2) Woods Hole Oceanographic Institution, 02543 Woods Hole, MA, USA;(3) Chicago Zoological Society, c/o Mote Marine Laboratory, 34236 Thompson Parkway Sarasota, FL, USA;(4) Inter-American Tropical Tuna Commission, c/o Scripps Institution of Oceanography, 92037 La Jolla, CA, USA;(5) Oregon Research Institute, 97401 Eugene, OR, USA |
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| Abstract: | Signature whistles of 42 free-ranging bottle-nose dophin calves were compared to those of their mothers. Humans judged their similarity by inspection of spectrograms. There was a sex difference in the tendency of calves to produce whistles similar to or different from those of their mothers; most female calves produced whistles that were different from those of their mothers, whereas male calves were more likely to produce whistles that were similar to those of their mothers. Because matrilineally related females associate together and use signature whistles to establish and/or maintain contact with their calves, there may be a selective pressure for females to produce whistles that are distinct from those of their mothers. There may be fewer constraints governing whistle development in males, with the result that some males produce whistles similar to those of their mothers and others do not. |
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| Keywords: | Bottlenose dophin Signature whistle Sex difference |
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