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bioacoustics article: Acoust. Res. Lett. Online 4(4)

Subject: bioacoustics article: Acoust. Res. Lett. Online 4(4)
From: Dave Mellinger <>
Date: Mon, 03 Nov 2003 10:26:15 -0800
Volume 4, Issue 4, pp. 112-134
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 Ringed seal densities and noise near an icebound artificial island with
 construction and drilling
 Valerie D. Moulton, W. John Richardson, Michael T. Williams, and Susanna B.
 pp. 112-117
 A monitoring program documented densities of ringed seals, Phoca hispida,
 before and during development of the Northstar oil field in the central
 Alaskan Beaufort Sea. Aerial surveys of seals on landfast ice were
 conducted during the springs of 1997 to 1999 (pre-construction) and
 2000?2001 (construction and drilling). Acoustic and vibration data were
 acquired during the ice-covered seasons of 2000 and 2001. Underwater
 sounds, in-air sounds, and iceborne vibrations from Northstar were above
 background levels to distances of 1?5, 0.5?4, and 1?4 km, respectively.
 However, seal densities close to Northstar in 2000 and 2001 were not
 reduced relative to those farther away or during the 1997 to 1999 period.
 (c) 2003 Acoustical Society of America. 

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