We are pleased to announce the publication of the following article:
Musser, W.B., A.E. Bowles, D.M. Grebner, and J.L.
Crance. 2014. Differences in acoustic features of vocalizations
produced by killer whales
cross-socialized with bottlenose dolphins. Journal of the Acoustical
Society of America, 137(4): 1990-2002.
http://scitation.aip.org/content/asa/journal/jasa/136/4/10.1121/1.4893906
Abstract:
Limited previous evidence suggests that killer whales (Orcinus orca)
are capable of vocal production learning.
However, vocal contextual learning has not been studied, nor the
factors promoting learning.
Vocalizations were collected from three killer whales with a history
of exposure to bottlenose dolphins
(Tursiops truncatus) and compared with data from seven killer whales
held with conspecifics and nine bottlenose dolphins.
The three whales' repertoires were distinguishable by a higher
proportion of click trains and whistles.
Time-domain features of click trains were intermediate between those
of whales held with conspecifics and dolphins.
These differences provided evidence for contextual learning. One
killer whale spontaneously learned to produce
artificial chirps taught to dolphins; acoustic features fell within
the range of inter-individual differences
among the dolphins. This whale also produced whistles similar to a
stereotyped whistle produced by one dolphin.
Thus, results provide further support for vocal production learning and
show that killer whales are capable of contextual learning. That
killer whales produce similar repertoires
when associated with another species suggests substantial vocal
plasticity and motivation for vocal
conformity with social associates.
Ann E. Bowles, PhD
Hubbs-SeaWorld Research Institute
<mailto:[email protected]>[email protected]
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Ann E. Bowles, PhD | Program Leader, Bioacoustics
Hubbs-SeaWorld Research Institute
2595 Ingraham Street | San Diego | CA 92109
Phone: (619) 226-3870 | Fax: (619) 226-3944
<mailto:[email protected]>[email protected] | www.hswri.org
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