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다중주파수를 이용한 살오징어(Todarodes pacificus)의 분포밀도 추정
신형호 ( Hyoung-ho Shin ),정종일 ( Jongil Jung ),이형빈 ( Hyoungbeen Lee ),오우석 ( Wooseok Oh ),박근창 ( Geunchang Park ),이경훈 ( Kyounghoon Lee ) 한국수산과학회 2021 한국수산과학회지 Vol.54 No.6
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 m<sup>2</sup>/nmi<sup>2</sup> was the highest in the east sea area, and the same in the summer season 880 m<sup>2</sup>/nmi<sup>2</sup> 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.