Comparison of Target Strength of Pacific Herring (Clupea pallasii Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model

Pacific herring (Clupea pallasii Valenciennes, 1847) is a commercially important species that inhabits the coastal waters of the North Pacific from Korea to California, USA. This study analyzed the target strength (TS; dB re 1 m2) of Pacific herring individu...

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Autores principales:	Euna Yoon, Woo-Seok Oh, Hyungbeen Lee, Kangseok Hwang, Doo-Nam Kim, Kyounghoon Lee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Pacific herring target strength acoustic survey ex-situ KRM model Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/128dde38d3ec449eac4aac4d39b22416
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spelling	oai:doaj.org-article:128dde38d3ec449eac4aac4d39b224162021-11-11T19:54:27ZComparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model10.3390/w132130092073-4441https://doaj.org/article/128dde38d3ec449eac4aac4d39b224162021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3009https://doaj.org/toc/2073-4441Pacific herring (<i>Clupea pallasii</i> Valenciennes, 1847) is a commercially important species that inhabits the coastal waters of the North Pacific from Korea to California, USA. This study analyzed the target strength (TS; dB re 1 m<sup>2</sup>) of Pacific herring individuals (<i>n</i> = 14, total length (<i>L</i><sub>T</sub>) = 21.3–32.3 cm) at 38 and 120 kHz using ex-situ measurements and the Kirchhoff-ray mode (KRM) model. The least-squares regressions of the TS–<i>L</i><sub>T</sub> relationship for the ex-situ measurements were TS<sub>38kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 70.10 (r = 0.17) and TS<sub>120kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 70.59 (r = 0.10). The least-squares regressions for the KRM model were TS<sub>38kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 68.39 (r = 0.40) and TS<sub>120kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 69.74 (r = 0.49). The <i>b</i><sub>20</sub> value of the KRM model was 1.71 dB higher than that of the ex-situ measurement at 38 kHz but similar at 120 kHz. These results provide basic data to evaluate the distribution and abundance of Pacific herring using fisheries’ acoustic technology.Euna YoonWoo-Seok OhHyungbeen LeeKangseok HwangDoo-Nam KimKyounghoon LeeMDPI AGarticlePacific herringtarget strengthacoustic surveyex-situKRM modelHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3009, p 3009 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Pacific herring target strength acoustic survey ex-situ KRM model Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	Pacific herring target strength acoustic survey ex-situ KRM model Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Euna Yoon Woo-Seok Oh Hyungbeen Lee Kangseok Hwang Doo-Nam Kim Kyounghoon Lee Comparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model
description	Pacific herring (<i>Clupea pallasii</i> Valenciennes, 1847) is a commercially important species that inhabits the coastal waters of the North Pacific from Korea to California, USA. This study analyzed the target strength (TS; dB re 1 m<sup>2</sup>) of Pacific herring individuals (<i>n</i> = 14, total length (<i>L</i><sub>T</sub>) = 21.3–32.3 cm) at 38 and 120 kHz using ex-situ measurements and the Kirchhoff-ray mode (KRM) model. The least-squares regressions of the TS–<i>L</i><sub>T</sub> relationship for the ex-situ measurements were TS<sub>38kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 70.10 (r = 0.17) and TS<sub>120kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 70.59 (r = 0.10). The least-squares regressions for the KRM model were TS<sub>38kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 68.39 (r = 0.40) and TS<sub>120kHz</sub> = 20 log<sub>10</sub>(<i>L</i><sub>T</sub>) − 69.74 (r = 0.49). The <i>b</i><sub>20</sub> value of the KRM model was 1.71 dB higher than that of the ex-situ measurement at 38 kHz but similar at 120 kHz. These results provide basic data to evaluate the distribution and abundance of Pacific herring using fisheries’ acoustic technology.
format	article
author	Euna Yoon Woo-Seok Oh Hyungbeen Lee Kangseok Hwang Doo-Nam Kim Kyounghoon Lee
author_facet	Euna Yoon Woo-Seok Oh Hyungbeen Lee Kangseok Hwang Doo-Nam Kim Kyounghoon Lee
author_sort	Euna Yoon
title	Comparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model
title_short	Comparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model
title_full	Comparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model
title_fullStr	Comparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model
title_full_unstemmed	Comparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model
title_sort	comparison of target strength of pacific herring (<i>clupea pallasii</i> valenciennes, 1847) from ex-situ measurements and a theoretical model
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/128dde38d3ec449eac4aac4d39b22416
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Comparison of Target Strength of Pacific Herring (<i>Clupea pallasii</i> Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model

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