Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon)
Abstract Sound scattering and absorption by Northern krill (Meganyctiphanes norvegica) were measured over the acoustic bandwidth of 30–210 kHz and compared with similar scattering measurements for Antarctic krill (Euphausia superba). The measurements of total target strength (TTS; energy scattered i...
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Oxford University Press (OUP)
2005
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croxfordunivpr:10.1016/j.icesjms.2005.01.024 2024-01-07T09:39:34+01:00 Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon) Conti, Stéphane G. Demer, David A. Brierley, Andrew S. 2005 http://dx.doi.org/10.1016/j.icesjms.2005.01.024 http://academic.oup.com/icesjms/article-pdf/62/5/956/29151223/62-5-956.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 62, issue 5, page 956-965 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2005 croxfordunivpr https://doi.org/10.1016/j.icesjms.2005.01.024 2023-12-08T09:33:55Z Abstract Sound scattering and absorption by Northern krill (Meganyctiphanes norvegica) were measured over the acoustic bandwidth of 30–210 kHz and compared with similar scattering measurements for Antarctic krill (Euphausia superba). The measurements of total target strength (TTS; energy scattered in all directions, averaged over all angles of incidence) match the SDWBA model (stochastic distorted-wave Born approximation) recently developed for Antarctic krill, indicating its validity for other euphausiid species with similar size and shape. However, the TTS of crustaceans with markedly different shapes are not well predicted by SDWBA derived with the generic krill shape and scaled to animal length (L). Therefore, crustacean target strength (TS) may not be estimated accurately by a linear function of log10(L), irrespective of shape, questioning the validity of the current TS relationship used for Antarctic krill derived from data measured from multiple crustaceans. TTS and TS are dependent upon both L and shape, and different crustaceans have significantly different shapes and width-to-length relationships. In contrast, modelled TTS and TS spectra for gravid and non-gravid krill appear to have differing amplitudes, but similar shapes. Additionally, measurements of absorption spectra from decapods indicate that the absorption cross-section increases with the volume of the animal. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Meganyctiphanes norvegica Northern krill Oxford University Press (via Crossref) Antarctic ICES Journal of Marine Science 62 5 956 965 |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Conti, Stéphane G. Demer, David A. Brierley, Andrew S. Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon) |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Sound scattering and absorption by Northern krill (Meganyctiphanes norvegica) were measured over the acoustic bandwidth of 30–210 kHz and compared with similar scattering measurements for Antarctic krill (Euphausia superba). The measurements of total target strength (TTS; energy scattered in all directions, averaged over all angles of incidence) match the SDWBA model (stochastic distorted-wave Born approximation) recently developed for Antarctic krill, indicating its validity for other euphausiid species with similar size and shape. However, the TTS of crustaceans with markedly different shapes are not well predicted by SDWBA derived with the generic krill shape and scaled to animal length (L). Therefore, crustacean target strength (TS) may not be estimated accurately by a linear function of log10(L), irrespective of shape, questioning the validity of the current TS relationship used for Antarctic krill derived from data measured from multiple crustaceans. TTS and TS are dependent upon both L and shape, and different crustaceans have significantly different shapes and width-to-length relationships. In contrast, modelled TTS and TS spectra for gravid and non-gravid krill appear to have differing amplitudes, but similar shapes. Additionally, measurements of absorption spectra from decapods indicate that the absorption cross-section increases with the volume of the animal. |
format |
Article in Journal/Newspaper |
author |
Conti, Stéphane G. Demer, David A. Brierley, Andrew S. |
author_facet |
Conti, Stéphane G. Demer, David A. Brierley, Andrew S. |
author_sort |
Conti, Stéphane G. |
title |
Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon) |
title_short |
Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon) |
title_full |
Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon) |
title_fullStr |
Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon) |
title_full_unstemmed |
Broad-bandwidth, sound scattering, and absorption from krill (Meganyctiphanes norvegica), mysids (Praunus flexuosus and Neomysis integer), and shrimp (Crangon crangon) |
title_sort |
broad-bandwidth, sound scattering, and absorption from krill (meganyctiphanes norvegica), mysids (praunus flexuosus and neomysis integer), and shrimp (crangon crangon) |
publisher |
Oxford University Press (OUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1016/j.icesjms.2005.01.024 http://academic.oup.com/icesjms/article-pdf/62/5/956/29151223/62-5-956.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Meganyctiphanes norvegica Northern krill |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Meganyctiphanes norvegica Northern krill |
op_source |
ICES Journal of Marine Science volume 62, issue 5, page 956-965 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2005.01.024 |
container_title |
ICES Journal of Marine Science |
container_volume |
62 |
container_issue |
5 |
container_start_page |
956 |
op_container_end_page |
965 |
_version_ |
1787429772816547840 |