Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring
Abstract The acoustic characteristics of biological backscattering in the western North Pacific were studied to verify expert knowledge on species composition in the echosigns. The survey was conducted in the Kuroshio‐Oyashio inter‐frontal zone and the subarctic waters in April 2003. The species com...
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crwiley:10.1111/j.1365-2419.2009.00519.x 2024-06-02T08:15:00+00:00 Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring MURASE, HIROTO ICHIHARA, MORIO YASUMA, HIROKI WATANABE, HIKARU YONEZAKI, SHIROH NAGASHIMA, HIROSHI KAWAHARA, SHIGEYUKI MIYASHITA, KAZUSHI 2009 http://dx.doi.org/10.1111/j.1365-2419.2009.00519.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.2009.00519.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.2009.00519.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Oceanography volume 18, issue 6, page 386-401 ISSN 1054-6006 1365-2419 journal-article 2009 crwiley https://doi.org/10.1111/j.1365-2419.2009.00519.x 2024-05-03T10:35:37Z Abstract The acoustic characteristics of biological backscattering in the western North Pacific were studied to verify expert knowledge on species composition in the echosigns. The survey was conducted in the Kuroshio‐Oyashio inter‐frontal zone and the subarctic waters in April 2003. The species composition of backscatterings was identified by using midwater trawl, Isaacs‐Kidd midwater trawl and Bongo net. The differences of mean volume backscattering strengths between 120 and 38 kHz (ΔMVBS 120−38 ) were calculated for the backscatterings. Six types of backscatterings were classified based on the results of net samples and the ΔMVBS 120−38 . The ΔMVBS 120−38 of each group was as follows: copepods 13.7–17.3 dB, krill 11.6–15.3 dB, Japanese anchovy −1.6 to 1.1 dB, a myctophid, Diaphus theta −0.8 dB, sand lance 6.1 dB and larvae and juveniles of pelagic and mesopelagic fish −9.6 to −4.0 dB. The results suggest that biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring can be characterized by using ΔMVBS. Article in Journal/Newspaper Subarctic Copepods Wiley Online Library Kidd ENVELOPE(-65.972,-65.972,-66.448,-66.448) Oyashio ENVELOPE(157.000,157.000,50.000,50.000) Pacific Fisheries Oceanography 18 6 386 401 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The acoustic characteristics of biological backscattering in the western North Pacific were studied to verify expert knowledge on species composition in the echosigns. The survey was conducted in the Kuroshio‐Oyashio inter‐frontal zone and the subarctic waters in April 2003. The species composition of backscatterings was identified by using midwater trawl, Isaacs‐Kidd midwater trawl and Bongo net. The differences of mean volume backscattering strengths between 120 and 38 kHz (ΔMVBS 120−38 ) were calculated for the backscatterings. Six types of backscatterings were classified based on the results of net samples and the ΔMVBS 120−38 . The ΔMVBS 120−38 of each group was as follows: copepods 13.7–17.3 dB, krill 11.6–15.3 dB, Japanese anchovy −1.6 to 1.1 dB, a myctophid, Diaphus theta −0.8 dB, sand lance 6.1 dB and larvae and juveniles of pelagic and mesopelagic fish −9.6 to −4.0 dB. The results suggest that biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring can be characterized by using ΔMVBS. |
format |
Article in Journal/Newspaper |
author |
MURASE, HIROTO ICHIHARA, MORIO YASUMA, HIROKI WATANABE, HIKARU YONEZAKI, SHIROH NAGASHIMA, HIROSHI KAWAHARA, SHIGEYUKI MIYASHITA, KAZUSHI |
spellingShingle |
MURASE, HIROTO ICHIHARA, MORIO YASUMA, HIROKI WATANABE, HIKARU YONEZAKI, SHIROH NAGASHIMA, HIROSHI KAWAHARA, SHIGEYUKI MIYASHITA, KAZUSHI Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring |
author_facet |
MURASE, HIROTO ICHIHARA, MORIO YASUMA, HIROKI WATANABE, HIKARU YONEZAKI, SHIROH NAGASHIMA, HIROSHI KAWAHARA, SHIGEYUKI MIYASHITA, KAZUSHI |
author_sort |
MURASE, HIROTO |
title |
Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring |
title_short |
Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring |
title_full |
Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring |
title_fullStr |
Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring |
title_full_unstemmed |
Acoustic characterization of biological backscatterings in the Kuroshio‐Oyashio inter‐frontal zone and subarctic waters of the western North Pacific in spring |
title_sort |
acoustic characterization of biological backscatterings in the kuroshio‐oyashio inter‐frontal zone and subarctic waters of the western north pacific in spring |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1365-2419.2009.00519.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.2009.00519.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.2009.00519.x |
long_lat |
ENVELOPE(-65.972,-65.972,-66.448,-66.448) ENVELOPE(157.000,157.000,50.000,50.000) |
geographic |
Kidd Oyashio Pacific |
geographic_facet |
Kidd Oyashio Pacific |
genre |
Subarctic Copepods |
genre_facet |
Subarctic Copepods |
op_source |
Fisheries Oceanography volume 18, issue 6, page 386-401 ISSN 1054-6006 1365-2419 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2419.2009.00519.x |
container_title |
Fisheries Oceanography |
container_volume |
18 |
container_issue |
6 |
container_start_page |
386 |
op_container_end_page |
401 |
_version_ |
1800739038246731776 |