Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
권호 표지
DOI QR코드

DOI QR Code

Measurements of Sound Speed and Density Contrasts of the Moon Jellyfish (Aurelia aurita s.l.) for Hydroacoustic Model

수중음향 모델을 위한 보름달물해파리(Aurelia aurita s.l.)의 체내 음속비 및 밀도비

  • Kang, Don-Hyug (Marine Security Research Center, KORDI) ;
  • Lee, Chang-Won (Department of Environmental Marine Sciences, Division of Science and Technology Hanyang University) ;
  • Lee, Hyung-Been (Marine Security Research Center, KORDI) ;
  • Kim, Mi-Ra (Marine Security Research Center, KORDI)
  • 강돈혁 (한국해양연구원 해양방위연구센터) ;
  • 이창원 (한양대학교 과학기술대학 해양환경과학과) ;
  • 이형빈 (한국해양연구원 해양방위연구센터) ;
  • 김미라 (한국해양연구원 해양방위연구센터)
  • Received : 2011.10.25
  • Accepted : 2012.01.18
  • Published : 2012.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

Physical properties such as sound speed contrast (h) and density contrast (g) of the interested target are key parameters to understand acoustic characteristics by using theoretical scattering models. The density and sound speed of moon jellyfish (common jellyfish, Aurelia aurita s.l.) were measured. Sound speed contrast (h) was measured from travel time difference (time-of-flight method) of an acoustic signal in a water tank for APOP studies (Acoustic Properties Of zooplankton). Density contrast (g) was measured by the displacement volume and wet weight (dual-density method). The sound speed remained almost constant as the moon jellyfish increased in bell length. The mean values${\pm}$standard deviation of h and g were $1.0005{\pm}0.0012$ and $0.9808{\pm}0.0195$), respectively. These results will provide important input for use in theoretical scattering models for estimating the acoustic target strength of jellyfish.

Keywords

References

  1. 국토해양부 (2009) 유해해양생물 해파리 피해예방 기획연구 보고서. 국립수산과학원, 225 p
  2. Brierley AS, Axelsen BE, Buecher E, Sparks CAJ, Boyer H, Gibbons MJ (2001) Acoustic observations of jellyfish in the Namibian Benguela. Mar Eco Prog Ser 210:55-66 https://doi.org/10.3354/meps210055
  3. Brierley AS, Axelsen BE, Boyer DC, Lynam CP, Didcock CA, Boyer HJ, Sparks CAJ, Purcell JE, Gibbons MJ (2004) Single-target echo detections of jellyfish. ICES J Mar Sci 61:383-393 https://doi.org/10.1016/j.icesjms.2003.12.008
  4. Chu D, Wiebe P, Copley N (2000) Inference of material properties of zooplankton from acoustic and resistivity measurements. ICES J Mar Sci 57:1128-1142 https://doi.org/10.1006/jmsc.2000.0800
  5. Chu D, Wiebe PH (2005) Measurements of sound-speed and density contrasts of zooplankton in Antarctic waters. ICES J Mar Sci 62:818-831 https://doi.org/10.1016/j.icesjms.2004.12.020
  6. Colombo GA, Mianzan H, Madriolas A (2003) Acoustic characterization of gelatinous-plankton aggregations: four case studies from the Argentine continental shelf. ICES J Mar Sci 60:650-657 https://doi.org/10.1016/S1054-3139(03)00051-1
  7. Hirose M, Mukai T, Hwang D, Iida K (2009) The acoustic characteristics of three jellyfish species: Nemopilema nomurai, Cyanea nozakii, and Aurelia aurita. ICES J Mar Sci 66:1233-1237 https://doi.org/10.1093/icesjms/fsp126
  8. Kang D, Iida K, Mukai T, Kim JM (2006) Density and sound speed contrasts of the Japanese common squid (Todarodes pacificus) and their influence on acoustic target strength. Fish Sci 72:728-736 https://doi.org/10.1111/j.1444-2906.2006.01211.x
  9. Kang DH, Kim JH, Lee HB, Myung JG (2009) Target strength characteristics of multiple gelatinous organisms, Aurelia aurita, and Cyanea nozakii. In: The 10th Western Pacific Acoustic Conference, Beijing, China, 21-23 Sep 2009, pp 1-8
  10. Lee JH, Choi HW, Chae JH, Kim DS, Lee SB (2006) Performance analysis of intake screens in power plants on mass impingement of marine organisms. Ocean and Polar Res 28:385-393 https://doi.org/10.4217/OPR.2006.28.4.385
  11. Lee YW, Hwang BK (2009) Theoretical examination of the effects of fluctuation of acoustic scattering on the swimming behavior of giant jellyfish. J Korean Fish Soc 42:165-170 https://doi.org/10.5657/kfas.2009.42.2.165
  12. Medwin H, Clay CS (1998) Fundamentals of acoustical oceanography. Academic Press, San Diego, 712 p
  13. Mills CE (2001) Jellyfish blooms: are populations increasing globally in response to changing ocean conditions? Hydrobiologia 451:55-68 https://doi.org/10.1023/A:1011888006302
  14. Monger BC, Chinniah-Chandy S, Meir E, Billings S, Greene CH, Wiebe PH (1998) Sound scattering by the gelatinous zooplankters Aequorea victoria and Pleurobrachia bachei. Deep-Sea Res II 45:1255-1271 https://doi.org/10.1016/S0967-0645(98)00029-0
  15. Mukai T, Hirose M, Sawada K, Takahashi H, Iida K (2009) Target strength of moon jellyfish-Variations with pulsation and posture. In: Proceedings of meeting of the Marine Acoustic Society of Japan, pp 19-22
  16. Mutlu E (1996) Target strength of the common jellyfish (Aurelia aurita): a preliminary experimental study with a dual-beam acoustic system. ICES J Mar Sci 53:309-311 https://doi.org/10.1006/jmsc.1996.0040
  17. Pond S, Pickard GL (1986) Introductory dynamic oceanography, 2nd edition. Pergamon press, Oxford, 329 p
  18. Simmonds J, MacLennan D (2005) Fisheries Acoustics: theory and practice, 2nd edition. Blackwell Science, UK, 437 p
  19. Warren JD, Smith JN (2007) Density and sound speed of two gelatinous zooplankton Ctenophore (Mnemiopsis leidyi) and lion's mane jellyfish (Cyanea capillata). J Acoust Soc Am 122:574-580 https://doi.org/10.1121/1.2739433

Cited by

  1. An estimation of the sound-speed and density of moon jellyfish (Aurelia aurita) in Korean waters vol.49, pp.4, 2013, https://doi.org/10.3796/KSFT.2013.49.4.483