The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance
Abstract Nishimori, Y., Iida, K., Furusawa, M., Tang, Y., Tokuyama, K., Nagai, S., and Nishiyama, Y. 2009. The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance. – ICES Journal of Marine Science, 66: 1037–1042. A three-dimensional, echo-i...
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croxfordunivpr:10.1093/icesjms/fsp053 2024-02-04T10:03:21+01:00 The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance Nishimori, Yasushi Iida, Kohji Furusawa, Masahiko Tang, Yong Tokuyama, Kozo Nagai, Sanae Nishiyama, Yoshihiro 2009 http://dx.doi.org/10.1093/icesjms/fsp053 http://academic.oup.com/icesjms/article-pdf/66/6/1037/29133495/fsp053.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 66, issue 6, page 1037-1042 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2009 croxfordunivpr https://doi.org/10.1093/icesjms/fsp053 2024-01-05T09:27:12Z Abstract Nishimori, Y., Iida, K., Furusawa, M., Tang, Y., Tokuyama, K., Nagai, S., and Nishiyama, Y. 2009. The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance. – ICES Journal of Marine Science, 66: 1037–1042. A three-dimensional, echo-integration method (3DEI) which uses scanning-sonar observations of a fish school to estimate its backscattering cross section (σbss = Nσbs) was developed. Coupled with a modelled estimate of the average backscattering cross section of individual fish (σbs), the 3DEI theoretically allows estimation of the number of fish in a school (N). To test the practicality of the method, measurements were made of a metal sphere simulating fish, and several spheres simulating a fish school. The 3DEI correctly measured the σbss of each target. Next, the 3DEI was applied to echo data from a herring school in the Norwegian Sea, to estimate its σbss. Several values of σbs were estimated with a prolate-spheroid model, each assuming different distributions of fish orientations relative to the sonar beam. Dividing the 3DEI-estimated σbss by these modelled σbs shows that the resulting estimates of N were closer to the skipper's estimate than those estimated using the apparent school volume. The 3DEI measurements of σbss, modelled σbs, and resulting accuracy of N depend largely on the assumed orientations of the fish relative to the acoustic beam. Article in Journal/Newspaper Norwegian Sea Oxford University Press (via Crossref) Norwegian Sea ICES Journal of Marine Science 66 6 1037 1042 |
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Open Polar |
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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 Nishimori, Yasushi Iida, Kohji Furusawa, Masahiko Tang, Yong Tokuyama, Kozo Nagai, Sanae Nishiyama, Yoshihiro The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Nishimori, Y., Iida, K., Furusawa, M., Tang, Y., Tokuyama, K., Nagai, S., and Nishiyama, Y. 2009. The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance. – ICES Journal of Marine Science, 66: 1037–1042. A three-dimensional, echo-integration method (3DEI) which uses scanning-sonar observations of a fish school to estimate its backscattering cross section (σbss = Nσbs) was developed. Coupled with a modelled estimate of the average backscattering cross section of individual fish (σbs), the 3DEI theoretically allows estimation of the number of fish in a school (N). To test the practicality of the method, measurements were made of a metal sphere simulating fish, and several spheres simulating a fish school. The 3DEI correctly measured the σbss of each target. Next, the 3DEI was applied to echo data from a herring school in the Norwegian Sea, to estimate its σbss. Several values of σbs were estimated with a prolate-spheroid model, each assuming different distributions of fish orientations relative to the sonar beam. Dividing the 3DEI-estimated σbss by these modelled σbs shows that the resulting estimates of N were closer to the skipper's estimate than those estimated using the apparent school volume. The 3DEI measurements of σbss, modelled σbs, and resulting accuracy of N depend largely on the assumed orientations of the fish relative to the acoustic beam. |
format |
Article in Journal/Newspaper |
author |
Nishimori, Yasushi Iida, Kohji Furusawa, Masahiko Tang, Yong Tokuyama, Kozo Nagai, Sanae Nishiyama, Yoshihiro |
author_facet |
Nishimori, Yasushi Iida, Kohji Furusawa, Masahiko Tang, Yong Tokuyama, Kozo Nagai, Sanae Nishiyama, Yoshihiro |
author_sort |
Nishimori, Yasushi |
title |
The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance |
title_short |
The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance |
title_full |
The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance |
title_fullStr |
The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance |
title_full_unstemmed |
The development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance |
title_sort |
development and evaluation of a three-dimensional, echo-integration method for estimating fish-school abundance |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1093/icesjms/fsp053 http://academic.oup.com/icesjms/article-pdf/66/6/1037/29133495/fsp053.pdf |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Norwegian Sea |
genre_facet |
Norwegian Sea |
op_source |
ICES Journal of Marine Science volume 66, issue 6, page 1037-1042 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsp053 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
6 |
container_start_page |
1037 |
op_container_end_page |
1042 |
_version_ |
1789970714836598784 |