[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 
80305-3328/

*Abstract*
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.

*ERRATA:
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.

*
Cheers-

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

 

 


 


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