Index Catalog // ScholarsArchive@OSU

Energy : converting from acoustic to biological resource units

Creator:: Benoit-Bird, Kelly J. and Au, Whitlow W. L.
Abstract:: Acoustic backscattering strength is often used as an index of biomass; however, the relationship between these variables has not been directly validated. Relationships were investigated between acoustic cross section at 200 kHz, measured as part of a previous study, and measured values of length, biovolume, dry weight, ash-free dry weight,...
Resource Type:: Article
Full Text:: distribution of the populations being studied. ©2002 Acoustical Society of America. @DOI: 10.1121/1.1470505

Observation of sound focusing and defocusing due to propagating nonlinear internal waves

Creator:: Luo, J., Badiey, M., Karjadi, E. A., Katsnelson, B., Tskhoidze, A., Lynch, J. F., and Moum, J. N.
Abstract:: Fluctuations of the low frequency sound field in the presence of an internal solitary wave packet during the Shallow Water ’06 experiment are analyzed. Acoustic, environmental, and on-board ship radar image data were collected simultaneously before, during, and after a strong internal solitary wave packet passed through the acoustic track....
Resource Type:: Article
Full Text:: Luo et al.: JASA Express Letters �DOI: 10.1121/1.2963087

Mid-frequency sound propagation through internal waves at short range with synoptic oceanographic observations

Creator:: Rouseff, Daniel, Tang, Dajun, Williams, Kevin L., Wang, Zhongkang, and Moum, James N.
Abstract:: Preliminary results are presented from an analysis of mid-frequency acoustic transmission data collected at range 550m during the Shallow Water 2006 Experiment. The acoustic data were collected on a vertical array immediately before, during, and after the passage of a nonlinear internal wave on 18 August, 2006. Using oceanographic data...
Resource Type:: Article
Full Text:: Rouseff et al.: JASA Express Letters �DOI: 10.1121

Testing the odontocete acoustic prey debilitation hypothesis: No stunning results

Creator:: Benoit-Bird, Kelly J., Au, Whitlow W. L., and Kastelein, Ronald A.
Abstract:: The hypothesis that sounds produced by odontocetes can debilitate fish was examined. The effects of simulated odontocete pulsed signals on three species of fish commonly preyed on by odontocetes were examined, exposing three individuals of each species as well as groups of four fish to a high-frequency click of a...
Resource Type:: Article
Full Text:: can disorient or “stun” prey cannot be supported. © 2006 Acoustical Society of America. �DOI: 10.1121

Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises

Creator:: Au, Whitlow W. L., Benoit-Bird, Kelly J., and Kastelein, Ronald A.
Abstract:: The target strength as a function of aspect angle were measured for four species of fish using dolphin-like and porpoise-like echolocation signals. The polar diagram of target strength values measured from an energy flux density perspective showed considerably less fluctuation with azimuth than would a pure tone pulse. Using detection...
Resource Type:: Article
Full Text:: dolphin echolocation signals. © 2007 Acoustical Society of America. �DOI: 10.1121/1.2734487� PACS number

Acoutstic basis for fish prey discrimination by echolocating dolphins and porpoises

Creator:: Au, Whitlow W. L., Branstetter, Brian K., Benoit-Bird, Kelly, and Kastelein, Ronald A.
Abstract:: The biosonar system of dolphins and porpoises has been studied for about 5 decades and much has been learned [Au,W.W. L. )1993). The Sonar of Dolphins (Springer, New York)]. Most experiments have involved human-made targets; little is known about odontocetes’ echolocation of prey. To address this issue, acoustic backscatter from...
Resource Type:: Article
Full Text:: aspect angle. © 2009 Acoustical Society of America. �DOI: 10.1121/1.3147497� PACS number�s�: 43.80.Ka

Acoustic backscattering by Hawaiian lutjanid snappers. II. Broadband temporal and spectral structure

Creator:: Au, Whitlow W. L. and Benoit-Bird, Kelly J.
Abstract:: The characteristics of acoustic echoes from six species of deep-dwelling (up to 400 m) Hawaiian Lujanid snappers were determined by backscatter measurements at the surface. A broadband linear frequency-modulated signal and a short dolphinlike sonar signal were used as the incident signals. The fish were anesthetized and attached to a...
Resource Type:: Article
Full Text:: distinguishable between species. ©2003 Acoustical Society of America. @DOI: 10.1121/1.1614257# PACS numbers

Cooperative prey herding by the pelagic dolphin, Stenella longirostris

Creator:: Benoit-Bird, Kelly J. and Au, Whitlow W. L.
Abstract:: Sonar techniques were used to quantitatively observe foraging predators and their prey simultaneously in three dimensions. Spinner dolphins foraged at night in highly coordinated groups of 16–28 individuals using strict four-dimensional patterns to increase prey density by up to 200 times. Herding exploited the prey’s own avoidance behavior to achieve...
Resource Type:: Article

Target strength measurements of Hawaiian mesopelagic boundary community animals

Creator:: Benoit-Bird, Kelly J. and Au, Whitlow W. L.
Abstract:: A 200-kHz echosounder modified to digitize the envelope of the received echoes directly into a computer was used to measure the ex situ target strength (TS) of live animals from the Hawaiian mesopelagic boundary community as a function of animal size, tilt and roll angle, and biological classification. Dorsal aspect...
Resource Type:: Article
Full Text:: . @DOI: 10.1121/1.1382620# PACS numbers: 43.30.Sf, 43.30.Ft, 43.20.Fn@DLB# a c p e d- i h t ity o an

Echo strength and density structure of Hawaiian mesopelagic boundary community patches

Creator:: Benoit-Bird, Kelly J. and Au, Whitlow W. L.
Abstract:: A broadband sonar system and digital camera with strobe lights were mounted on a vertically profiling frame with a depth sensor. The echo strengths and densities of animals within individual mesopelagic boundary community patches were investigated as a function of depth. Time and distance from shore were also investigated. Simultaneous...
Resource Type:: Article
Full Text:: America. @DOI: 10.1121/1.1612484# PACS numbers: 43.30.Sf, 43.30.Ft, 43.30.Vh@WMC# a e m he m b at d

ScholarsArchive@OSU

Energy : converting from acoustic to biological resource units

Observation of sound focusing and defocusing due to propagating nonlinear internal waves

Mid-frequency sound propagation through internal waves at short range with synoptic oceanographic observations

Testing the odontocete acoustic prey debilitation hypothesis: No stunning results

Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises

Acoutstic basis for fish prey discrimination by echolocating dolphins and porpoises

Acoustic backscattering by Hawaiian lutjanid snappers. II. Broadband temporal and spectral structure

Cooperative prey herding by the pelagic dolphin, Stenella longirostris

Target strength measurements of Hawaiian mesopelagic boundary community animals

Echo strength and density structure of Hawaiian mesopelagic boundary community patches

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