DOI QR코드

DOI QR Code

Fish length dependence of target strength for black rockfish, goldeye rockfish at 70kHz and 120kHz

70kHz 및 120kHz에 있어서 조피볼락, 불볼락에 대한 반사강도의 체장 의존성

  • Mun, Jae-Ho (Management support team, National Fisheries Research & Development Institute) ;
  • Lee, Dae-Jae (Department of Marine Production System Engineering, Pukyong National University) ;
  • Shin, Hyeong-Il (Department of Marine Production System Engineering, Pukyong National University) ;
  • Lee, Yoo-Won (Department of Marine Production System Engineering, Pukyong National University)
  • 문재호 (국립수산과학원 연구운영팀) ;
  • 이대재 (부경대학교 해양생산시스템공학과) ;
  • 신형일 (부경대학교 해양생산시스템공학과) ;
  • 이유원 (부경대학교 해양생산시스템공학과)
  • Published : 2006.02.28

Abstract

Black rockfish and goldeye rockfish are commercially important fish species due to the increasing demand in Korea. When estimating the abundance of stocks for these species acoustically, it is of crucial importance to know the target strength(TS) to length dependence. In relation to these needs, TS measurement was conducted on black rockfish and goldeye rockfish in an acrylic salt water tank using 70kHz and 120kHz split beam echo sounders. The TS for these two species under the controlled condition was simultaneously measured with the swimming movement by DVR system and analyzed as a function of fish length(L). The results obtained are summarized as follows: The best fit regression of TS on fish length of black rockfish was TS=19.38 Log(L, cm)-70.46 ($r^2=0.71$) at 70kHz and TS=22.39 Log(L, cm)-70.40 ($r^2=0.64$) at 120kHz and in the standard form TS=20 Log(L, cm)-71.29 ($r^2 = 0.70$) at 70kHz and TS=20 Log(L, cm)-66.88 ($r^2=0.57$) at 120kHz. The best fit regression of TS on fish length of goldeye rockfish was TS=17.10 Log(L, cm)-68.28 ($r^2=0.37$) at 70kHz and TS=24.39 Log(L, cm)-73.74 ($r^2=0.59$) at 120kHz and in the standard form TS=20 Log(L, cm)-72.03 ($r^2=0.32$) at 70kHz and TS=20 Log(L, cm)-67.68 ($r^2=0.64$) at 120kHz. An empirical model for fish TS(dB) averaged over the dorsal aspect of 115 fishes of black rockfish and goldeye rockfish and which spans the fish length(L, m) to wavelength($\lambda$, m) ratio between 8 and 30 was derived : TS=34.12 Log(L)-14.12 Log($\lambda$)-23.83, ($r^2=0.90$).

Keywords

Target strength;Length dependence;Black rockfish;Goldeye rockfish

References

  1. Foote, K.G. and D.J. Francis, 2002. Comparing Kirchhoff-approximation and boundary - element models for computing) gadoid target strengths. J. Acoust. Soc. Am., III, 1644 -1654
  2. Gauthier, S. and G.A. Rose, 2001. Target strength of encaged Atlantic redfish (Sebastes spp.). ICES Journal of Marine Science, 58, 562 - 568 https://doi.org/10.1006/jmsc.2001.1066
  3. Goddard, G.C. and V.G.Welsby, 1986. The acoustic target strength of live fish. J. Cons. int. Exlor. Mer., 42, 197-211 https://doi.org/10.1093/icesjms/42.3.197
  4. Kang, D.H., D.J. Hwang, T. Mukai, K. lida and K.H. Lee, 2004a. Acoustic target strength of live Japanese common squid(Todarodes pacifica) for applying biomass estimation. J. Kor. Fish. Soc., 37, 345 - 353
  5. Kang, D.H., K. Sadayasu, T. Mukai, K. Iida, D.J. Hwang, K. Sawada and K. Miyashita, 2004b. Target strength estimation of black porgy Acanthopagrus schlegeli using acoustic measurements and a scattering model. Fisheries Science, 70, 819 - 828 https://doi.org/10.1111/j.1444-2906.2004.00875.x
  6. Kang, D.H. and D.J. Hwang, 2003. Ex situ target strength of rockfish (Sebastes schlegeli) and red sea bream (Pagrus major) in the Northwest Pacific. ICES Journal of Marine Science, 60, 538 - 543 https://doi.org/10.1016/S1054-3139(03)00040-7
  7. Lee, D.J., 1999. Instrumentation engineering for fisheries. Taehwa Printing, Busan, pp. 180 - 207
  8. Love, R.H., 1971. Measurements of fish target strength: a review. Fish. Bull., 69, 703 - 715
  9. Ministry of Maritime Affairs & Fisheries(MOMAF), 2004. Feasibility Studies on the Maine Ranching Program of East, West and Jeju Coastal Areas in Korea. Ministry of Maritime Affairs & Fisheries, 1 - 3
  10. Mukai, T., N. Sano, K. lida and S. Sakai, 1993a. Studies on dorsal aspect target strength of ten species of fish collected in the East China Sea. Nippon Suisan Gakkaishi, 59,1515 -1525 https://doi.org/10.2331/suisan.59.1515
  11. Mukai, T., N. Sano, K. lida and S. Sakai,1993b. Relation between dorsal aspect target strength of fish caught in the East China Sea and their swimbladder. Nippon Suisan Gakkaishi, 60, 215 - 222
  12. Son, C.W. and D.J. Hwang, 2002. Target Strength of Schlegel's Black Rockfish (Sebastes schlegeli) and Red Seabream (Pagrus major). Bull. Korean Soc. Fish. Tech., 38(2), 119 - 128 https://doi.org/10.3796/KSFT.2002.38.2.119
  13. Foote, K.G., A. Aglen and O. Nakken, 1986. Measurement of fish target strength with split - beam echo sounder. J. Acoust. Soc. Am., 80, 612 - 621 https://doi.org/10.1121/1.394056
  14. Kang, H.Y. and D.J. Lee, 2003. Fish length dependence of acoustic target strength for large yellow croaker. Bull. Korean Soc. Fish. Tech., 39, 239 - 248 https://doi.org/10.3796/KSFT.2003.39.3.239

Cited by

  1. Hydroacoustic survey on distribution and density of fisheries resources in the Marado coastal area of Jeju, Korea vol.52, pp.3, 2016, https://doi.org/10.3796/KSFT.2016.52.3.209
  2. 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 vol.46, pp.3, 2010, https://doi.org/10.3796/KSFT.2010.46.3.239
  3. Morphological Properties and Target Strength Characteristics for dark banded rockfish (Sebastes inermis) vol.51, pp.1, 2015, https://doi.org/10.3796/KSFT.2015.51.1.120
  4. 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
  5. Target strength characteristics of sailfin sandfish (Arctoscopus japonicus) using ex situ experiment and acoustic model vol.51, pp.3, 2015, https://doi.org/10.3796/KSFT.2015.51.3.405
  6. Age and Growth of the Goldeyes Rockfish Sebasetes thompsoni in the Ulleungdo and Dokdo Areas vol.48, pp.6, 2015, https://doi.org/10.5657/KFAS.2015.0929
  7. Acoustic target strength measurements on immobile riverine shrimp, oriental river prawn(Macrobrachium koreana), in freshwater vol.44, pp.1, 2008, https://doi.org/10.3796/KSFT.2008.44.1.037
  8. Target strength estimation of dominant species in marine ranching ground of Jeju coastal water by KRM model vol.46, pp.2, 2010, https://doi.org/10.3796/KSFT.2010.46.2.157
  9. ) vol.176, pp.1755-1315, 2018, https://doi.org/10.1088/1755-1315/176/1/012027