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

  • 제46권3호
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  • Pages.239-247
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  • 2010
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  • 2671-9940(pISSN)
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  • 2671-9924(eISSN)
한국수산해양기술학회 (The Korean Society of Fisheries and Ocean Technology)
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부산 용호만 인공어초 어장에서 어획된 돌돔, 성대 및 전어에 대한 음향반사강도의 체장 의존성

Fish length dependence of target strength for striped beakperch, bluefin searobin and konoshiro gizzard shad caught in the artificial reef ground of Yongho Man, Busan

  • 이대재 (부경대학교 해양생산시스템관리학부)
  • Lee, Dae-Jae (Division of Marine Production System Management, Pukyong National University)
  • 투고 : 2010.07.23
  • 심사 : 2010.08.12
  • 발행 : 2010.08.31
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초록

Species of fish such as striped beakperch, bluefin searobin and konoshiro gizzard shad are commercially very important due to their high demand in the Korean market. When estimating acoustically the abundance of stocks for these species, it is of crucial importance to know the target strength (TS) to the length dependence. In relation to these needs, the TS experiments were conducted on three different species in an acrylic salt water tank using two split-beam echo sounders of 70 and 120 kHz. The TS for these three species under the controlled condition was simultaneously measured with the swimming movement by a DVR system and analyzed as a function of fish length (L) and frequency (or wavelength $\lambda$). The equation of the form TS=a log (L)+b log ($\lambda$)+c was derived for their TS-length dependence. The best fit regression of TS on fork length for striped beakperch was estimated as TS=35.67 log (L, m) -15.67 log ($\lambda$, m) -46.69 ($r^2$=0.78). Furthermore, the best fit regression of TS on fork length for konoshiro gizzard shad was shown to be TS=25.85 log (L, m) -5.85 log ($\lambda$, m) -32.22 ($r^2$=0.51). The averaged TS for 12 bluefin searobins with a mean length of 24.36cm at 70 kHz was analyzed to be -41.55dB. In addition, the averaged tilt angle obtained simultaneously by a DVR system with TS measurements for 27 konoshiro gizzard shads swimming within an acrylic salt water tank was estimated at $-2.7^{\circ}$.

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참고문헌

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피인용 문헌

  1. Monitoring of Fish Aggregations Responding to Artificial Reefs Using a Split-beam Echo Sounder, Side-scan Sonar, and an Underwater CCTV Camera System at Suyeong Man, Busan, Korea vol.46, pp.3, 2013, https://doi.org/10.5657/KFAS.2013.0266
  2. Fish length dependence of target strength for black porgy and fat greenling at two frequencies of 70 and 120kHz vol.48, pp.2, 2012, https://doi.org/10.3796/KSFT.2012.48.2.137
  3. Overview of the Applications of Hydroacoustic Methods in South Korea and Fish Abundance Estimation Methods vol.17, pp.3, 2014, https://doi.org/10.5657/FAS.2014.0369
  4. Estimating the biomass of anchovy species off the coast of Tongyeong and Yeosu in South Korea in the spring and winter of 2013 and 2014 vol.51, pp.1, 2015, https://doi.org/10.3796/KSFT.2015.51.1.086
  5. Visual census and hydro-acoustic survey of demersal fish aggregations in Ulju small scale marine ranching area (MRA), Korea vol.51, pp.1, 2015, https://doi.org/10.3796/KSFT.2015.51.1.016