Details

Autor(en) / Beteiligte

• McDonald, Mark A.
• Hildebrand, John A.
• Wiggins, Sean M.
• Thiele, Deborah
• Glasgow, Deb
• Moore, Sue E.

Titel

Sei whale sounds recorded in the Antarctic

Ist Teil von

• The Journal of the Acoustical Society of America, 2005-12, Vol.118 (6), p.3941-3945

Ort / Verlag

Woodbury, NY: Acoustical Society of America

Erscheinungsjahr

2005

Quelle

MEDLINE

Beschreibungen/Notizen

• Sei whales are the least well known acoustically of all the rorquals, with only two brief descriptions of their calls previously reported. Recordings of low-frequency tonal and frequency swept calls were made near a group of four or five sei whales in waters west of the Antarctic Peninsula on 19 February 2003. These whales also produced broadband sounds which can be described as growls or whooshes. Many of the tonal and frequency swept calls (30 out of 68) consist of multiple parts with a frequency step between the two parts, this being the most unique characteristic of the calls, allowing them to be distinguished from the calls of other whale species. The average duration of the tonal calls is 0.45 ± 0.3 s and the average frequency is 433 ± 192 Hz . Using a calibrated seafloor recorder to determine the absolute calibration of a sonobuoy system, the maximum source level of the tonal calls was 156 ± 3.6 dB re 1 μ Pa at 1 m . Each call had different character and there was no temporal pattern in the calling.