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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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A pilot study on estimating the biomass of chub mackerel and jack mackerel in the northwestern sea of Jeju Island using trawl survey and frequency characteristics

트롤 조사와 주파수특성을 이용한 제주도 서북 해역의 고등어와 전갱이 생물량 추정에 관한 예비 연구

  • KANG, Myounghee (Department of Maritime Police and Production System/Institute of Marine Industry, Gyeongsang National University) ;
  • MIN, Eunbi (Division of Fisheries Science, Chonnam National University) ;
  • KIM, Byung-Yeob (Training Ship, Jeju National University) ;
  • LEE, Changheon (Training Ship, Jeju National University) ;
  • KANG, Taejong (Division of Fisheries Science, Chonnam National University) ;
  • OH, Taegeon (Resources Enhancement Division, Korea Fisheries Resources Agency) ;
  • LIM, Byeonggwon (Resources Enhancement Division, Korea Fisheries Resources Agency) ;
  • HWANG, Doojin (School of Marine Technology, Chonnam National University)
  • 강명희 (경상국립대학교 해양경찰시스템학과/해양산업연구소) ;
  • 민은비 (전남대학교 수산과학과) ;
  • 김병엽 (제주대학교 실습선) ;
  • 이창헌 (제주대학교 실습선) ;
  • 강태종 (전남대학교 수산과학과) ;
  • 오태건 (한국수산자원공단 자원조성팀) ;
  • 임병권 (한국수산자원공단 자원조성팀) ;
  • 황두진 (전남대학교 해양기술학부)
  • Received : 2021.11.01
  • Accepted : 2022.01.05
  • Published : 2022.02.28
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Abstract

In September and October 2020, combined acoustic and trawl surveys were conducted in the northwestern sea of Jeju Island. In the survey area, a region, so called Jeju region, was designated to esimate the biomass of chub mackerel and jack mackerel using a trawl survey method and frequency difference method. In the September survey, the weight ratios of jack mackerel and chub mackerel to the total catch were 24.6% and 2.8%, respectively, and in the October survey, those ratios were 24.9% and 20.7%, which were used to calculate their biomass (trawl survey). Using the frequency difference range (-8 to -3dB) corresponding to two species in 120 and 200 kHz, their biomass was estimated (frequency difference method). As a result, the biomass of two species from the trawl method was 3252.3 tons in September and 5777.0 tons in October. The estimated biomass by the frequency difference method was 4926.6 tons in September and 7521.5 tons in October. It was the first trial to estimate the biomass of two species using the trawl and frequency differencing methods in South Korea although there were some differences between two methods. In addition, horizontal distributions of acoustic backscattering strength over the entire survey area were mapped.

Keywords

Acknowledgement

이 성과는 2018년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구(NRF-2018R1A2B6005666)이며, 한국수산자원공단 "근해 수산자원 증대사업 기본 계획 및 중장기 계획 수립" 연구과제의 지원을 받아 연구되었습니다(2020.12). 또한, 이 논문은 2021년 해양수산부 재원으로 해양수산과학기술진흥원의 지원을 받아 수행된 연구(광대역 음향기술을 이용한 북극해 어류 생태 특징 추출에 관한 연구, 1525011758)이며, 2019년도 경상국립대학교 연구년제 연구교수 연구지원비에 의하여 수행되었습니다.

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