[MARMAM] Publication

sara.heimlich Sara.Heimlich at noaa.gov
Mon Jan 9 09:52:48 PST 2006

Dear Colleagues,

I would like to draw your attention to the following paper, published in 
the *September* edition of the Journal of the Acoustical Society of 
America:   Vol 118, No.3, Pt.1 pp.1830-1837

*Types, distribution, and seasonal occurrence of sounds attributed to 
Bryde's whales (/Balaenoptera edeni)/ recorded in the eastern tropical 
Pacific, 1999-2001*

Sara L. Heimlich(1), David K. Mellinger(1), Sharon L. Nieukirk(1), 
Christopher G. Fox(2) /
(1) Cooperative Institute for Marine Resources Studies, Oregon State 
University, and NOAA Pacific Marine Environmental Laboratory, 2030 SE 
Marine Science Drive, Newport, Oregon  97365/
/(2) National Geophysical Data Center, National Oceanographic and 
Atmospheric Administration, 325 Broadway, E/GC, Boulder, Colorado 

Vocalizations resembling known Bryde's whale sounds were recorded on 
autonomous hydrophones at seven sites in the eastern tropical Pacific. 
Five short (<3 s) low-frequency (<80 Hz ) "phrase" types were observed. 
"Swept alternating tonal" phrases included a 37 Hz tone and often a 
25-16 Hz downswept tone, while "non-swept alternating tonal" phrases had 
a predominant tone at 29 Hz and often additional tones at 16 Hz and 47 
Hz. Alternating tonal phrases were found in 79% of the total hours in 
which phrases were detected, and occurred primarily at the eastern 
hydrophone sites/. / "Burst-tonal" phrases included tones that were 
often preceded by a wide-band burst of noise. The "low burst-tonal" 
phrase contained tones at 19 Hz and 30 Hz, and was detected at five of 
the hydrophone sites. The "high burst-tonal" phrase included a 42 Hz 
tone and was observed only on the northwestern hydrophones. A single 
"harmonic tone" phrase type was observed that included a fundamental 
tone at 26 Hz and at least two harmonics; this phrase was observed 
exclusively at the eastern hydrophone stations. This opportunistic 
survey has shown that acoustics is an effective means of studying this 
poorly understood, pelagic balaenopterid.

Page 1834, Section C.  Geographic and seasonal occurrence.  The first 
sentence should read:
Swept and nonswept alternating tonal phrase types were the most abundant 
of the five types, comprising 1535 (46.3% and 1097 (33.1%). 
respectively, of the total 3315 PTH.


Sara Heimlich
Hatfield Marine Science Center,
2030 SE Marine Science Drive,
Newport, Oregon  97365
(541) 867-0328




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