Index Catalog // ScholarsArchive@OSU

Creator:: Benoit-Bird, Kelly J.
Abstract:: Land-associated, sound-scattering layers of mesopelagic micronekton surround the Hawaiian Islands. These animals undergo diel migrations during which they split into multiple, distinct layers that have differences in animal density, taxonomic composition, and size. A video-camera system capable of quantitatively estimating the biological constituency of the layers was combined with a...
Resource Type:: Article
Full Text:: size, and numerical density on the frequency response of volume backscatter Kelly J. Benoit-Bird

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:: proportional to height. . Au and K. J. Benoit-Bird: Broadband backscatter from mesopelagic n ove B. Shrimps

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:: . Benoit-Bird and W. Au: Acoustic and biological energy y s b o rd a e d a iffe o hip he be it d ve

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:: K. J. Benoit-B f e e a- - s- ait e d. n e s l - e e - ed 10 by raising one side of the frame

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:: boundary community patches Kelly J. Benoit-Birda) Hawaii Institute of Marine Biology and Department of

Creator:: Benoit-Bird, Kelly J. and Gilly, William F.
Abstract:: We used split-beam acoustic techniques to observe free-swimming of jumbo squid Dosidicus gigas during 4 cruises in the Gulf of California. Four-dimensional spatio-temporal data revealed that at night in shallow water, jumbo squid were using ascending, spiral-like swimming paths to emerge from extremely dense aggregations, and were likely foraging on...
Resource Type:: Article
Full Text:: Coordinated nocturnal behavior of foraging jumbo squid Dosidicus gigas Kelly J. Benoit-Bird1,*, William F

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
Full Text:: dolphin, Stenella longirostris Kelly J. Benoit-Birda� College of Oceanic and Atmospheric Sciences

Creator:: Benoit-Bird, Kelly J. and McManus, Margaret A.
Abstract:: The importance of spatial pattern in ecosystems has long been recognized. However, incorporating patchiness into our understanding of forces regulating ecosystems has proven challenging. We used a combination of continuously sampling moored sensors complemented by shipboard sampling to measure the temporal variation, abundance, and vertical distribution of four trophic levels...
Resource Type:: Article
Full Text:: Microsoft Word - Benoit-Bird & McManus 03_07_12.doc 1

Creator:: Cade, David E. and Benoit-Bird, Kelly J.
Abstract:: Acoustic scattering layers are ubiquitous, horizontally extensive aggregations of both vertebrate and invertebrate organisms that play key roles in oceanic ecosystems. However, currently there are no conventions or widely adaptable automatic methods for identifying these often dynamic, spatially complex features, so it is difficult to consistently and efficiently describe and...
Resource Type:: Article
Full Text:: detection and tracking of acoustic scattering layers Cade, D. E., & Benoit-Bird, K. J. (2014). An

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:: . Au and K. J. Benoit-Bird: Lutjanid snapper backscatter structure or b FIG. 6. Relative amplitude

ScholarsArchive@OSU