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Article

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

1
Fisheries Resource Research Center, National Institute of Fisheries Science, Tongyeong 53064, Korea
2
Division of Fisheries Science, Chonnam National University, Yeosu 59626, Korea
3
Dokdo Fisheries Research Center, National Institute of Fisheries Science, Pohang 37709, Korea
4
Distant Water Fisheries Research Center, National Institute of Fisheries Science, Busan 46083, Korea
5
Department of Marine Technology, Chonnam National University, Yeosu 59626, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: James S. Albert
Water 2021, 13(21), 3009; https://doi.org/10.3390/w13213009
Received: 18 June 2021 / Revised: 16 September 2021 / Accepted: 17 September 2021 / Published: 27 October 2021
(This article belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
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 individuals (n = 14, total length (LT) = 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–LT relationship for the ex-situ measurements were TS38kHz = 20 log10(LT) − 70.10 (r = 0.17) and TS120kHz = 20 log10(LT) − 70.59 (r = 0.10). The least-squares regressions for the KRM model were TS38kHz = 20 log10(LT) − 68.39 (r = 0.40) and TS120kHz = 20 log10(LT) − 69.74 (r = 0.49). The b20 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. View Full-Text
Keywords: Pacific herring; target strength; acoustic survey; ex-situ; KRM model Pacific herring; target strength; acoustic survey; ex-situ; KRM model
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MDPI and ACS Style

Yoon, E.; Oh, W.-S.; Lee, H.; Hwang, K.; Kim, D.-N.; Lee, K. Comparison of Target Strength of Pacific Herring (Clupea pallasii Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model. Water 2021, 13, 3009. https://doi.org/10.3390/w13213009

AMA Style

Yoon E, Oh W-S, Lee H, Hwang K, Kim D-N, Lee K. Comparison of Target Strength of Pacific Herring (Clupea pallasii Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model. Water. 2021; 13(21):3009. https://doi.org/10.3390/w13213009

Chicago/Turabian Style

Yoon, Euna, Woo-Seok Oh, Hyungbeen Lee, Kangseok Hwang, Doo-Nam Kim, and Kyounghoon Lee. 2021. "Comparison of Target Strength of Pacific Herring (Clupea pallasii Valenciennes, 1847) from Ex-Situ Measurements and a Theoretical Model" Water 13, no. 21: 3009. https://doi.org/10.3390/w13213009

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