[MARMAM] New publication on beluga sound exchange

Tadamichi Morisaka chaka at wrc.kyoto-u.ac.jp
Sat Jan 26 22:30:43 PST 2013

Dear MARMAM list subscribers,

We are pleased to announce the publication on beluga sound exchange in
Journal of Ethology (online).

A pdf can be requested at: chaka at wrc.kyoto-u.ac.jp

All the best,
               Tadamichi Morisaka

Morisaka T, Yoshida Y, Akune Y, Mishima H, Nishimoto S. 2013. Exchange
of “signature” calls in captive belugas (Delphinapterus leucas).
Journal of Ethology. doi:10.1007/s10164-013-0358-0.

Belugas (Delphinapterus leucas) produce echolocation clicks, burst
pulses, and whistles. The sounds of 3 captive belugas were recorded
using 2 hydrophones at the Port of Nagoya Public Aquarium. There were
stable individual differences in the pulse patterning of one type of
pulsed sounds (PS1 call), suggesting that belugas use these as
“signature” calls. Eighty-eight percent of PS1 calls initiated PS1
calls from other animals within 1 s. PS1 calls repeated by the same
individual occurred primarily when other belugas did not respond
within 1 s of the first call. Belugas delayed successive PS1 calls
when other belugas responded with a PS1 call within 1 s. There was no
clear temporal pattern for whistles. It appears that the time limit
for responding to calls is 1 s after the initial call. If other
individuals do not respond to the PS1 call of a beluga within 1 s,
belugas tend to repeat the call and wait for a response. The results
of this study suggest that the belugas exchange their individual
signatures by using PS1 calls, in a manner similar to that of
signature whistles used by bottlenose dolphins.


Tadamichi MORISAKA, Ph.D.

Assistant Professor
Wildlife Research Center of Kyoto University

2-24, Tanaka-Sekiden-cho, Sakyo-ku,
Kyoto 606-8203, Japan

Tel: 075-771-4388; Fax: 075-771-4394
chaka at wrc.kyoto-u.ac.jp

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