한국수산과학회지 (Korean Journal of Fisheries and Aquatic Sciences)

  • 제51권4호
  • /
  • Pages.435-443
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  • 2018
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  • 0374-8111(pISSN)
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  • 2287-8815(eISSN)
한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)
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상업어선의 어군탐지기를 이용한 남극크릴(Euphausia superba) 자원량 추정

Estimating the Abundance of Antarctic Krill Euphausia superba Using a Commercial Trawl Vessel

  • 최석관 (국립수산과학원 원양자원과) ;
  • 한인우 (전남대학교 수산과학과) ;
  • 안두해 (국립수산과학원 원양자원과) ;
  • 정상덕 (국립수산과학원 원양자원과) ;
  • 윤은아 (전남대학교 해양기술학부) ;
  • 이경훈 (전남대학교 해양기술학부)
  • Choi, Seok-Gwan (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Han, Inwoo (Division of Fisheries Science, Chonnam National University) ;
  • An, Doo-hae (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Chung, Sang-deok (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Yoon, Eun-A (Department of Marine Technology, Chonnam National University) ;
  • Lee, Kyounghoon (Department of Marine Technology, Chonnam National University)
  • 투고 : 2018.06.22
  • 심사 : 2018.07.25
  • 발행 : 2018.08.31
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초록

The Antarctic krill Euphausia superba is important commercially and ecologically as a basic component of the Antarctic Ocean ecosystem. To manage this resource, it is important to determine the distribution and standing of krill in the water layer. Acoustic methods can capture information about the entire water layer quickly. Acoustic surveys were conducted from March 3 to March 14, 2017, using the commercial fishing boat Sejong (7,765 tons). Acoustic systems with a frequency of 38 kHz and a 200 kHz commercial echo sounder (ES70, Simrad, Norway) were used and the acquired data were processed using post processing software. The density and standing of Antarctic krill were determined using the two-frequency difference method, using the characteristics of two frequencies. To compare the frequency difference of krill, the method using the frequency difference according to the krill length, recommended by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) and the values extracted according to the krill length at survey stations where only krill were collected during the study period, were compared. The frequency difference ranges were 3.96-5.91 dB and -3.0~13.8 dB, respectively.

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