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http://dx.doi.org/10.5657/KFAS.2021.1023

Density Estimation of Japanese Common Squid Todarodes pacificus Using Multi-frequency  

Shin, Hyoung-Ho (Division of Marine Production Management, Chonnam National University)
Jung, Jongil (Division of Fisheries Science, Chonnam National University)
Lee, Hyoungbeen (Fisheries Resources Resherch Center, National Institute of Fisheries Sceiences)
Oh, Wooseok (Division of Fisheries Science, Chonnam National University)
Park, Geunchang (Division of Fisheries Science, Chonnam National University)
Lee, Kyounghoon (Division of Marine Production Management, Chonnam National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.54, no.6, 2021 , pp. 1023-1029 More about this Journal
Abstract
The Japanese common squid Todarodes pacificus is one of the fish species within the total allowable catch (TAC) system which requires further investigation. In this study, the acoustic survey method was used to analyze the distribution of the Japanese common squid Todarodes pacificus across all the seas of South Korea. The sea area within Korea was investigated using the research vessels 20, 21, and 22 of the National Institute of Fisheries Science. The acoustic surveys were carried out from July to September 2019 and February to May 2020. The acoustic systems used in the survey had frequencies of 38 kHz and 120 kHz (EK60, EK80, Simrad, Norway) of the split-beam scientific echosounder. The results showed that, in spring, 277 m2/nmi2 was the highest in the east sea area, and the same in the summer season 880 m2/nmi2 was the highest in the east sea area. In autumn, the highest nautical area scattering coefficient (NASC) value was observed in the coastal portion of the south sea, and in winter, the NASC values were generally low in all the sea area.
Keywords
Acoustic survey; Japanese common squid; Density estimation; Acoustic analysis;
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Times Cited By KSCI : 6  (Citation Analysis)
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