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Article: Acoustic Behavior of Antarctic Killer Whales (Orcinus orca) Recorded Near the Ice Edge of McMurdo Sound, Antarctica
- Article from:
- Aquatic Mammals
- Article date:
- October 1, 2008
- Author:
CopyrightCopyright Aquatic Mammals 2008. Provided by ProQuest LLC. (Hide copyright information)
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Abstract
Underwater acoustic recordings of a group of seven to nine killer whales (Orcinus orca) were made opportunistically along a lead within the fast-ice in McMurdo Sound, Ross Sea, Antarctica in early December 1979. At the time of the recordings, the killer whale group was chasing Adélie penguins (Pygoscelis adeliae); however, no predation events were observed. A total of 87 min and 39 s were recorded and examined, with 506 sounds analyzed. The animals produced echolocation clicks, buzz sequences, pulsed signals, and whistles. Seven previously undocumented call types were described from these killer whales based on consistent aural and spectrographic analysis of signals. Acoustic ...