Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Target strength characteristics of sailfin sandfish (Arctoscopus japonicus) using ex situ experiment and acoustic model

음향 실험 및 모델 기법을 이용한 도루묵 (Arctoscopus japonicus)의 음향산란반사강도 특성

  • LEE, Hyungbeen (Fisheries Resource Research Division, National Fisheries Research & Development Institute) ;
  • LEE, Kyounghoon (School of Marine Technology, Chonnam National University) ;
  • YOON, Eun-A (School of Marine Technology, Chonnam National University) ;
  • HWANG, Kangseok (Fisheries Resource Research Division, National Fisheries Research & Development Institute) ;
  • CHOI, Junghwa (Fisheries Resource Research Division, National Fisheries Research & Development Institute) ;
  • PARK, Tae-Geon (Team of Education and Research, Korea Institute of Maritime and Fisheries Technology)
  • 이형빈 (국립수산과학원 자원관리과) ;
  • 이경훈 (전남대학교 해양기술학부) ;
  • 윤은아 (전남대학교 해양기술학부) ;
  • 황강석 (국립수산과학원 자원관리과) ;
  • 최정화 (국립수산과학원 자원관리과) ;
  • 박태건 (한국해양수산연수원 교육연구팀)
  • Received : 2015.08.01
  • Accepted : 2015.08.26
  • Published : 2015.08.31
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Abstract

Acoustic target strength (TS) measurement and theoretical acoustic scattering models were applied to estimate the TS for assessing the fish biomass. TS measurement was made of ex situ sailfin sandfish Arctoscopus japonicus at 70 and 120 kHz, and then compared to backscatter model prediction. The live sandfish was tethered in seawater using monofilament lines. Measurements were made versus incidence angle, $-50^{\circ}$ to $50^{\circ}$ relative to dorsal aspect directions. Distorted wave Born approximation (DWBA) model was used to calculated TS pattern. The TS values of sandfish (body length: 16.2 cm) at 70 and 120 kHz were -66.94 dB and -64.45 dB, respectively, and were about 20 dB lower than TS of other fishes in Korea waters. These TS levels were distributed within the range of the theoretical TS. Ex situ measurement and theoretical TS may be applied to improve acoustical detection and biomass estimation of the sandfish, and is necessary to measure with various lengths.

Keywords

References

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