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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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The relationship between fish and zooplankton in south-western region of the East Sea using hydroacoustics

음향을 이용한 동해 남서부해역에서 어류와 동물플랑크톤의 관계

  • HAN, Inseong (Ocean Climate & Ecology Division, National Institute of Fisheries Sciences) ;
  • OH, Wooseok (Division of Fisheries Science, Chonnam National University) ;
  • YOON, Eun-A (School of Marine Technology, Chonnam National University) ;
  • SUH, Youngsang (Ocean Climate & Ecology Division, National Institute of Fisheries Sciences) ;
  • LEE, Kyounghoon (School of Marine Technology, Chonnam National University) ;
  • SHIN, Hyeongho (School of Marine Technology, Chonnam National University)
  • 한인성 (국립수산과학원 기후변화연구과) ;
  • 오우석 (전남대학교 수산과학과) ;
  • 윤은아 (전남대학교 해양기술학부) ;
  • 서영상 (국립수산과학원 기후변화연구과) ;
  • 이경훈 (전남대학교 해양기술학부) ;
  • 신형호 (전남대학교 해양기술학부)
  • Received : 2017.07.12
  • Accepted : 2017.10.30
  • Published : 2017.11.30
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Abstract

This study was conducted to understand the relationships between fish and zooplankton of distribution in the coastal waters of the East Sea from May to August 2016 using hydroacoustic. To distinguish between fish and zooplankton, we used the time varied threshold (TVT) method at the frequency of 120 kHz. As a result, the mean nautical area scattering coefficient (NASC) of fish was highest at $913m^2/n.mile^2$ in June and lowest at $315m^2/n.mile^2$ in July. The mean NASC of zooplankton was highest at $247m^2/n.mile^2$ in May and lowest at $70m^2/n.mile^2$ in July. The mean NASC of fish and zooplankton showed a significant difference (P < 0.05) with high correlation ($R^2=0.84$). In addition, there was no significant difference in the mean NASC of fishes and zooplankton by depth (t-test, person correction = -0.17, p > 0.05).

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