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Target strength estimation of dominant species in marine ranching ground of Jeju coastal water by KRM model

KRM 모델을 이용한 제주바다목장 해역 주요 우점종의 음향반사강도 추정

  • Lee, Seung-Jong (Subtropical Fisheries research center, Southwest Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Lee, Yoo-Won (Division of Marine Production System Management, Pukyong National University) ;
  • Kim, Joo-Il (Fisheries Resources Management Division, Southeast Sea Fisheries Research Institute, NFRDI) ;
  • Oh, Taeg-Yun (Fisheries Resources Management Division, NFRDI) ;
  • Hwang, Bo-Kyu (Research Center for Ocean Industry Development, Pukyong National University) ;
  • Kim, Byung-Yeob (Subtropical Fisheries research center, Southwest Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Lee, Kyoung-Hoon (Fisheries System Engineering Division, NFRDI)
  • 이승종 (국립수산과학원 남서해수산연구소 아열대수산연구센터) ;
  • 이유원 (부경대학교 해양생산시스템관리학부) ;
  • 김주일 (국립수산과학원 남동해수산연구소 자원관리과) ;
  • 오택윤 (국립수산과학원 자원관리과) ;
  • 황보규 (부경대학교 해양산업개발연구소) ;
  • 김병엽 (국립수산과학원 남서해수산연구소 아열대수산연구센터) ;
  • 이경훈 (국립수산과학원 시스템공학과)
  • Received : 2010.04.15
  • Accepted : 2010.05.06
  • Published : 2010.05.31

Abstract

The indirect target strength (TS) estimation method which uses the Kirchhoff ray mode model (KRM model) was discussed to apply for a biomass estimation in the water of mixed species. TS of 25 live scorpion fishes for 120kHz were measured by a tethered method and of others dominant 5 species in the marine ranching ground of Jeju coastal water including a scorpion fish were also estimated by KRM model. The measurement TS of scorpion fish well agreed with the theoretical values and the standard formula of scorpion fish was estimated as $TS_{120kHz}=20Log\;(L)-72.9$ ($r^2=0.67$). TScm values estimated on trial to each sample of dominant 5 species were from -69.3dB to -75.1dB at 120kHz and they were in the general range of swimbladdered fish. It was clarified that TS by KRM model can be used to estimate fish biomass estimation by increasing a sample number and is more effective under the condition that there is rare TS information for inhabiting species in mixed-species area.

Keywords

Target strength;Dominant species;Kirchhoff ray mode model;Marine ranching ground

Acknowledgement

Supported by : 국립수산과학원 제주수산연구소

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