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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Acoustic target strength measurements on immobile riverine shrimp, oriental river prawn(Macrobrachium koreana), in freshwater

담수역 징거미 새우(Macrobrachium koreana)의 음향 반사 강도 특성

  • Hwang, Bo-Kyu (Research Center for Ocean Industry Development, Pukyong National University) ;
  • Shin, Hyeon-Ok (Division of Marine Production System Management, Pukyong National University) ;
  • Cho, Sung-Ho (Department of Environmental Marine Science, Hanyang University) ;
  • Lee, Dae-Jae (Division of Marine Production System Management, Pukyong National University) ;
  • Kang, Don-Hyug (Marine Living Resources Division Research, Korea Ocean Research & Development Institute)
  • 황보규 (부경대학교 해양산업개발연구소) ;
  • 신현옥 (부경대학교 해양생산시스템관리학부) ;
  • 조성호 (한양대학교 해양환경과학과) ;
  • 이대재 (부경대학교 해양생산시스템관리학부) ;
  • 강돈혁 (한양해양연구원 해양자원연구본부)
  • Published : 2008.02.29
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Abstract

Assessment and management of fisheries abundance in fresh water like a river or a lake is very important to maintain fisheries itself as well as tourist industry even if their scale is not much large. The species for catch in fresh water are mainly a mandarin fish, a carp, an eel, and others. Because oriental river prawn is a main prey of these species and the change in its abundance is directly related to their abundance change in fresh water, information on the abundance and distribution of the species are necessary. Hydroacoustic survey is known to one of the efficient method among several methodology. Information on acoustic target strength is key parameter to estimate abundance for acoustic survey. In this study, measurements on oriental river prawn, Macrobrachium koreana, were conducted for two high frequencies(200kHz and 420kHz) with tilt angle using automatic rotating system. The results of acoustic target strength obtained from the experiment were compared with those of acoustic scattering model, Distorted Wave Born Approximation(DWBA) model. For 200kHz, the result of acoustic target strength experiments was expressed in terms of the averaged target strength dependence on the body langth(BL, cm) as a following relationship; < $TS_{200kHz}$ > = 45.9log(BL) - 107.4. These results provide basic information for studying acoustic target strength and conducting acoustic survey of oriental river prawn.

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References

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