Marine Fisheries Acoustics and Resource Assessment

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Biology".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 808

Special Issue Editor


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Guest Editor
College of Fisheries Science, Pukyong National University, Busan, Republic of Korea
Interests: fisheries acoustics; resource assessment; target strength; fish behavior; species identification
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Special Issue Information

Dear Colleagues,

Recent studies have utilized hydro-acoustic techniques to investigate the distribution and characteristics of fishery resources. Additionally, numerous countries worldwide are conducting various surveys to assess and manage the fishery resources within their national waters. For this Special Issue, we invite submissions that present the latest research on hydro-acoustic techniques, as well as the assessment and management of marine fishery resources. We particularly welcome manuscripts that provide new insights and approaches to species identification using multi-frequency methods, as well as improving the assessment and management of marine fish resources. Key topics include species identification through acoustic methods, estimation of target strength, marine fishery resource management, and marine fishery resource assessment. We hope that this Special Issue will make a significant contribution to the field of marine fishery assessment.

Dr. Kyounghoon Lee
Guest Editor

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Keywords

  • target strength
  • fisheries acoustics
  • marine fishery resource assessment
  • marine fishery resource management
  • species identification with multi-frequency
  • survey methods and data analysis in fishery resource assessment

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Published Papers (1 paper)

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Research

15 pages, 3772 KB  
Article
Estimating the Target Strength of Sardine (Sardinops sagax) as a Function of Swimming Orientation
by Geunchang Park, Jiyeon Kim, Hyunsuk Yoon, Seokgwan Choi and Kyounghoon Lee
J. Mar. Sci. Eng. 2026, 14(4), 368; https://doi.org/10.3390/jmse14040368 - 14 Feb 2026
Viewed by 491
Abstract
The swimming tilt angle of fish is one of the key factors influencing the estimation of target strength (TS). Therefore, understanding how TS varies with changes in swimming tilt angle is essential. This study employed the Kirchhoff-ray-mode (KRM) model to estimate TS and [...] Read more.
The swimming tilt angle of fish is one of the key factors influencing the estimation of target strength (TS). Therefore, understanding how TS varies with changes in swimming tilt angle is essential. This study employed the Kirchhoff-ray-mode (KRM) model to estimate TS and examine variations in the swimming tilt angle of sardines under flowing water conditions. Swimming tilt angles were measured at flow velocities of 30 and 50 cm/s. The KRM model was utilized to estimate TS for 17 sardine samples (total length: 13.0–24.6 cm) across four frequency bands (38, 70, 120, and 200 kHz). At a flow velocity of 30 cm/s, sardines swimming against the flow exhibited a mean swimming tilt angle of 4.0° ± 14.0°, with normalized mean TScm values of −64.7 dB at 38 kHz, −65.7 dB at 70 kHz, −66.4 dB at 120 kHz, and −66.9 dB at 200 kHz. At a flow velocity of 50 cm/s, sardines swimming against the flow showed a mean swimming tilt angle of −2.2° ± 10.1°, with normalized mean TScm values of −62.9 dB at 38 kHz, −63.7 dB at 70 kHz, −64.3 dB at 120 kHz, and −64.8 dB at 200 kHz. Considering the results of this study and the swimming behavior of sardines against the flow, the target strength of sardines swimming with the flow may be of less concern. Therefore, when conducting acoustic surveys, it is more efficient to account for flow velocity conditions rather than swimming direction. Full article
(This article belongs to the Special Issue Marine Fisheries Acoustics and Resource Assessment)
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