Index Catalog // ScholarsArchive@OSU

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

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:: the dominant scattering mechanism in the myctophid fishes studied. ©2001 Acoustical Society of America

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:: information about the diel migration patterns of these mesopelagic animals. ©2003 Acoustical Society of

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

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

Creator:: Benoit-Bird, Kelly J., Gilly, William F., and Au, Whitlow W. L.
Abstract:: This study presents the first target strength measurements of Dosidicus gigas, a large squid that is a key predator, a significant prey, and the target of an important fishery. Target strength of live, tethered squid was related to mantle length with values standardized to the length squared of −62.0, −67.4,...
Resource Type:: Article
Full Text:: support the use of the values presented here in D. gigas assessment studies. © 2008 Acoustical Society of

Creator:: Au, Whitlow W. L. and Benoit-Bird, Kelly J.
Abstract:: Broadband simulated dolphin echolocation signals were used to measure the ex situ backscatter properties of mesopelagic boundary community MBC in order to gain a better understanding of the echolocation process of spinner dolphins foraging on the MBC. Subjects were captured by trawling with a 2-m-opening Isaacs-Kidd Midwater Trawl. Backscatter measurements...
Resource Type:: Article
Full Text:: Society of America. �DOI: 10.1121/1.2902187� PACS number�s�: 43.80.Ka, 43.30.Sf, 43.30.Ft, 43.20.Fn �JAS

Creator:: Benoit-Bird, Kelly J. and Au, Whitlow W. L.
Abstract:: Groups of spinner dolphins have been shown to cooperatively herd small prey. It was hypothesized that the strong group coordination is maintained by acoustic communication, specifically by frequency-modulated whistles. Observations of groups of spinner dolphins foraging at night within a sound-scattering layer were made with a multibeam echosounder while the...
Resource Type:: Article
Full Text:: Society of America. �DOI: 10.1121/1.2967477� PACS number�s�: 43.80.Ka, 43.30.Sf �JAS� Pages: 539–546 I

Creator:: Benoit-Bird, Kelly J., Au, Whitlow W. L., and Kelley, Christopher D.
Abstract:: The target strengths and swimbladder morphology of six snapper species were investigated using broadband sonar, x rays, and swimbladder casts. Backscatter data were obtained using a frequency-modulated sweep ~60–200 kHz! and a broadband, dolphinlike click ~peak frequency 120 kHz! from live fish, mounted and rotated around each of their three...
Resource Type:: Article
Full Text:: length. ©2003 Acoustical Society of America. @DOI: 10.1121/1.1614256# PACS numbers: 43.30.Sf@WMC# Pages

ScholarsArchive@OSU