Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations
Recently reported declines in the population of Atlantic cod have led to calls for additional survey methods for stock assessments. In combination with conventional line-transect methods that may have ambiguities in sampling fish populations, Ocean Acoustic Waveguide Remote Sensing (OAWRS) has been...
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ftdoajarticles:oai:doaj.org/article:8e9c8a7558cf4b80b1728431d8c862ac 2023-05-15T15:27:10+02:00 Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations Ankita D. Jain Anamaria Ignisca Dong Hoon Yi Purnima Ratilal Nicholas C. Makris 2013-12-01T00:00:00Z https://doi.org/10.3390/rs6010180 https://doaj.org/article/8e9c8a7558cf4b80b1728431d8c862ac EN eng MDPI AG http://www.mdpi.com/2072-4292/6/1/180 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs6010180 https://doaj.org/article/8e9c8a7558cf4b80b1728431d8c862ac Remote Sensing, Vol 6, Iss 1, Pp 180-208 (2013) acoustic remote sensing wide-area fish detection OAWRS waveguide propagation Atlantic cod fisheries seafloor scattering Science Q article 2013 ftdoajarticles https://doi.org/10.3390/rs6010180 2022-12-30T20:32:19Z Recently reported declines in the population of Atlantic cod have led to calls for additional survey methods for stock assessments. In combination with conventional line-transect methods that may have ambiguities in sampling fish populations, Ocean Acoustic Waveguide Remote Sensing (OAWRS) has been shown to have a potential for providing accurate stock assessments (Makris N.C., et al. Science 2009, 323, 1,734–1,737; 54th Northeast Regional Stock Assessment Workshop (54th SAW) US Department of Commerce, Northeast Fisheries Science Center, 2012). The use of OAWRS technology enables instantaneous wide-area sensing of fish aggregations over thousands of square kilometers. The ratio of the intensity of scattered returns from fish versus the seafloor in any resolution cell typically determines the maximum fish detection range of OAWRS, which then is a function of fish population density, scattering amplitude and depth distribution, as well as the level of seafloor scattering. With the knowledge of oceanographic parameters, such as bathymetry, sound speed structure and attenuation, we find that a Rayleigh–Born volume scattering approach can be used to efficiently and accurately estimate seafloor scattering over wide areas. From hundreds of OAWRS measurements of seafloor scattering, we determine the Rayleigh–Born scattering amplitude of the seafloor, which we find has a ƒ2,4 frequency dependence below roughly 2 kHz in typical continental shelf environments along the US northeast coast. We then find that it is possible to robustly detect cod aggregations across frequencies at and near swim bladder resonance for observed spawningconfigurations along the U.S. northeast coast, roughly the two octave range 150–600 Hzfor water depths up to roughly 100 m. This frequency range is also optimal for long-rangeocean acoustic waveguide propagation, because it enables multimodal acoustic waveguidepropagation with minimal acoustic absorption and forward scattering losses. As the sensingfrequency moves away from the resonance peak, ... Article in Journal/Newspaper atlantic cod Directory of Open Access Journals: DOAJ Articles Remote Sensing 6 1 180 208 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
acoustic remote sensing wide-area fish detection OAWRS waveguide propagation Atlantic cod fisheries seafloor scattering Science Q |
spellingShingle |
acoustic remote sensing wide-area fish detection OAWRS waveguide propagation Atlantic cod fisheries seafloor scattering Science Q Ankita D. Jain Anamaria Ignisca Dong Hoon Yi Purnima Ratilal Nicholas C. Makris Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations |
topic_facet |
acoustic remote sensing wide-area fish detection OAWRS waveguide propagation Atlantic cod fisheries seafloor scattering Science Q |
description |
Recently reported declines in the population of Atlantic cod have led to calls for additional survey methods for stock assessments. In combination with conventional line-transect methods that may have ambiguities in sampling fish populations, Ocean Acoustic Waveguide Remote Sensing (OAWRS) has been shown to have a potential for providing accurate stock assessments (Makris N.C., et al. Science 2009, 323, 1,734–1,737; 54th Northeast Regional Stock Assessment Workshop (54th SAW) US Department of Commerce, Northeast Fisheries Science Center, 2012). The use of OAWRS technology enables instantaneous wide-area sensing of fish aggregations over thousands of square kilometers. The ratio of the intensity of scattered returns from fish versus the seafloor in any resolution cell typically determines the maximum fish detection range of OAWRS, which then is a function of fish population density, scattering amplitude and depth distribution, as well as the level of seafloor scattering. With the knowledge of oceanographic parameters, such as bathymetry, sound speed structure and attenuation, we find that a Rayleigh–Born volume scattering approach can be used to efficiently and accurately estimate seafloor scattering over wide areas. From hundreds of OAWRS measurements of seafloor scattering, we determine the Rayleigh–Born scattering amplitude of the seafloor, which we find has a ƒ2,4 frequency dependence below roughly 2 kHz in typical continental shelf environments along the US northeast coast. We then find that it is possible to robustly detect cod aggregations across frequencies at and near swim bladder resonance for observed spawningconfigurations along the U.S. northeast coast, roughly the two octave range 150–600 Hzfor water depths up to roughly 100 m. This frequency range is also optimal for long-rangeocean acoustic waveguide propagation, because it enables multimodal acoustic waveguidepropagation with minimal acoustic absorption and forward scattering losses. As the sensingfrequency moves away from the resonance peak, ... |
format |
Article in Journal/Newspaper |
author |
Ankita D. Jain Anamaria Ignisca Dong Hoon Yi Purnima Ratilal Nicholas C. Makris |
author_facet |
Ankita D. Jain Anamaria Ignisca Dong Hoon Yi Purnima Ratilal Nicholas C. Makris |
author_sort |
Ankita D. Jain |
title |
Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations |
title_short |
Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations |
title_full |
Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations |
title_fullStr |
Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations |
title_full_unstemmed |
Feasibility of Ocean Acoustic Waveguide Remote Sensing (OAWRS) of Atlantic Cod with Seafloor Scattering Limitations |
title_sort |
feasibility of ocean acoustic waveguide remote sensing (oawrs) of atlantic cod with seafloor scattering limitations |
publisher |
MDPI AG |
publishDate |
2013 |
url |
https://doi.org/10.3390/rs6010180 https://doaj.org/article/8e9c8a7558cf4b80b1728431d8c862ac |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
Remote Sensing, Vol 6, Iss 1, Pp 180-208 (2013) |
op_relation |
http://www.mdpi.com/2072-4292/6/1/180 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs6010180 https://doaj.org/article/8e9c8a7558cf4b80b1728431d8c862ac |
op_doi |
https://doi.org/10.3390/rs6010180 |
container_title |
Remote Sensing |
container_volume |
6 |
container_issue |
1 |
container_start_page |
180 |
op_container_end_page |
208 |
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1766357622132310016 |