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bioacoustics article: Aquatic Mammals 30(1), 2004

Subject: bioacoustics article: Aquatic Mammals 30(1), 2004
From: Dave Mellinger <>
Date: Fri, 18 Jun 2004 08:52:54 -0700
free-ranging Indo-Pacific humpback dolphins, _Sousa chinensis_. Aquatic
 Mammals_ 30(1):175-178.
 *Institute of Environmental Science, University of Wales Bangor, Robinson
 Building, Deiniol Road, Bangor, Gwynedd. LL57 2UW United Kingdom
 Opportunistic recordings of Indo-Pacific humpback dolphin clicks were made
 from a group of approximately ten humpback dolphins in the waters off Lantau
 Island, Hong Kong. Clicks were typically delphinid in waveshape, especially
 the click onsets, with spectral energy extending up to at least 200 kHz.
 Pulse durations were a few tens of microseconds. There appeared to be
 bimodality in the click spectra, an observation consistent with the
 hypothesis of asymmetric phonating lips. Due to the opportunistic nature of
 the recordings and the uncontrolled recording conditions, click waveforms
 captured here are unlikely to be representative of on-axis signals, so the
 spectrum of the recorded signals may differ from those that would be
 recorded directly in front of the animals.

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