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Ex situ acoustic target strength by tilt angle and pulsation of moon jellyfish (Aurelia aurita) using frequency 70 kHz

주파수 70 kHz를 이용한 보름달물해파리의 유영 자세각과 박동에 따른 초음파산란강도

  • YOON, Eun-A (Division of Marine Technology, Chonnam National University) ;
  • HWANG, Doo-Jin (Division of Marine Technology, Chonnam National University) ;
  • HIROSE, Miyuki (Division of Marine Technology, Chonnam National University) ;
  • SAWADA, Kouichi (National Research Institute of Fisheries Engineering, Fisheries Research Agency) ;
  • FUKUDA, Yoshiaki (National Research Institute of Fisheries Engineering, Fisheries Research Agency) ;
  • MUKAI, Tohru (Faculty of Fisheries Sciences, Hokkaido University)
  • Received : 2015.05.11
  • Accepted : 2015.08.28
  • Published : 2015.08.31

Abstract

Target strength (TS) information is an important parameter that estimates the detection, distribution, and abundance of Aurelia aurita. In order to investigate the biological TS of jellyfish, some factors such as size (bell diameter), tilt angle, pulsation, and symbion should be known. In the ex situ TS measurements, the tilt angles and pulsation from synchronized swimming behavior of four live A. aurita (bell diameters in the air: 54.2 ~ 94.2 mm) were measured with the acoustic data at 70 kHz. The reduced target strength (RTS) of A. aurita was found to change ranged from 13.4 ~ 16.5 dB according to the incidence angles from $-30^{\circ}$ to $24^{\circ}$. When the change rate of bell diameter in the water was 0.2, the TS value showed a 7.2 dB change. These results could be utilized as an important data to understand the acoustic characteristic scattering of A. aurita.

Keywords

Target strength;Jellyfish;Aurelia aurita;Pulsation

References

  1. Albert DJ. 2011. What's on the mind of a jellyfish? A review of behavioural observations on Aurelia sp. jellyfish. Neuroscience and Biobehavioral Reviews 35, 474-482. (doi:10.1016/j.neubiorev.2010.06.001) https://doi.org/10.1016/j.neubiorev.2010.06.001
  2. Alvarez Colombo G, Benovic A, Malej A, Lucic D, Makovec T, Onofri V, Acha M, Madirolas A and Mianzan H. 2009. Acoustic survey of a jellyfish-dominated ecosystem (Mljet Island, Croatia). Hydrobiologia 616, 99-111. (doi: 10.1007/s10750-008-9587-6) https://doi.org/10.1007/s10750-008-9587-6
  3. Aoki K, Yamada S, Toyokawa M, Yasuda A and Kikuchi T. 2012. Horizontal distribution and growth of jellyfish, Aurelia aurita (Linnaeus 1758) sensu lato, in Mikawa Bay, Japan. Coastal marine science 35, 103-111.
  4. Bamstedt U, Kaartvedt S and Youngbluth M. 2003. An evaluation of acoustic and video methods to estimate the abundance and vertical distribution of jellyfish. J Plankton Res 25, 1307-1318. (doi: 10.1093/plankt/fbg084) https://doi.org/10.1093/plankt/fbg084
  5. Brierley AS, Axelsen BE, Boyer DC, Lynam CP, Didcock CA, Boyer HJ, Sparks CAJ, Purcell JE and Gibbons MJ. 2004. Single-target echo detections of jellyfish. ICES J Mar Sci 61, 383-393. (doi: 10.1016/j.icesjms.2003.12.008) https://doi.org/10.1016/j.icesjms.2003.12.008
  6. Dong Z, Liu D and Keesing JK. 2010. Jellyfish blooms in China: Dominant species, causes and consequences. Mar Pollut Bull 60, 954-963. (doi: 10.1016/j.marpolbul.2010.04.022) https://doi.org/10.1016/j.marpolbul.2010.04.022
  7. Graham TR, Harvey JT, Benson SR, Renfree JS and Demer DA. 2010. The acoustic identification and enumeration of scyphozoan jellyfish, prey for leatherback sea turtles (Dermochelys coriacea), off central California. ICES J Mar Sci 67, 1739-1748. (doi: 10.1093/icesjms/fsq112) https://doi.org/10.1093/icesjms/fsq112
  8. Hirose M, Mukai T, Shimura T, Yamamoto J and Iida K. 2007. Measurements of specific density of and sound speed in Nomura's jellyfish Nemopilema nomurai to estimate their target strength using a theoretical scattering model. J Marine Acoust Soc Jpn 34, 109-118 (in Japanese with English abstract). https://doi.org/10.3135/jmasj.34.109
  9. Hirose M, Mukai T, Hwang DJ and Iida K. 2009. The acoustic characteristics of three jellyfish species: Nemopilema nomurai, Cyanea nozakii, and Aurelia aurita. ICES J Mar Sci 66, 1233-1237. (doi: 10.1093/icesjms/fsp126) https://doi.org/10.1093/icesjms/fsp126
  10. Hirose, M, Mukai T and Hwang DJ. 2010. Effect of swimming angle on acoustic characteristics of Nemopilema nomurai. Proceedings of meeting of the Marine Acoustic Society of Japan 2010, Tokyo, Japan, 27-28 May 2010, pp. 65-68.
  11. ImageJ. 2009. Open source software, developed by W. S. Rasband, Research Services Branch National Institute of Mental Health, Bethesda, Maryland, USA.
  12. Kang DH, Kim JH and Lim SH. 2010. Acoustic target strength characteristics of two species of multiple jellyfishes, Aurelia aurita and Cyanea nozakii, in the Southern Coast of Korea. Ocean and Polar Research 32, 113-122.
  13. Lee KH, Kim IO, Yoon WD, Shin JK and An HC. 2007. A study on vertical distribution observation of giant jellyfish (Nemopilema nomurai) using acoustical and optical methods. J Kor Soc Fish Tech 43, 355-361 (doi: 10.3796/KSFT.2007.43.4.355) https://doi.org/10.3796/KSFT.2007.43.4.355
  14. Lee YW and Hwang BK. 2009. Theoretical examination of the effects of fluctuation of acoustic scattering on the swimming behavior of giant jellyfish. J Kor Fish Soc 42, 165-170.
  15. Lucas CH. 2001. Reproduction and life history strategies of the common jellyfish, Aurelia aurita, in relation to its ambient environment. Hydrobiologia 451, 229-246. (doi: 10.1023/A:1011836326717) https://doi.org/10.1023/A:1011836326717
  16. Makabe R, Kurihara T and Uye S. 2012. Spatio-temporal distribution and seasonal population dynamics of the jellyfish Aurelia aurita s.l. studied with Dual-frequency IDentification SONar (DIDSON). J Plankton Res 34, 936-950. (doi:10.1093/plankt/fbs057) https://doi.org/10.1093/plankt/fbs057
  17. Monger BC, Chinniah-Chandy S, Meir E, Billings S, Greene CH and Wiebe PH. 1998. Sound scattering by the gelatinous zooplankters Aequorea victoria and Pleurobrachia bachei. Deep-Sea Res Part II 45, 1255-1271. (doi: 10.1016/S0967-0645(98)00029-0) https://doi.org/10.1016/S0967-0645(98)00029-0
  18. Mukai T, Hirose M, Sawada K, Takahashi H and Iida K. 2009. Target strength of moonjelly-Variations with pulsation and posture-. Proceedings of meeting of the Marine Acoustic Society of Japan 2009, Tokyo, Japan, 18-19 May 2009, pp. 19-22.
  19. 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. (doi:10.1006/jmsc.1996.0040) https://doi.org/10.1006/jmsc.1996.0040
  20. Mutlu E. 2001. Distribution and abundance of moon jellyfish (Aurelia aurita) and its zooplankton food in the Black Sea. Mar Biol 138, 329-339. (doi: 10.1007/s002270000459) https://doi.org/10.1007/s002270000459
  21. Sawada K. 2002. Study on the precise estimation of the target strength of fish. Bull Fish Res Agen 11, 47-122.
  22. Toyokawa M, Furota T and Terazaki M. 2000. Life history and seasonal abundance of Aurelia aurita medusae in Tokyo Bay, Japan. Plankton Biol Ecol 47, 48-58.
  23. Uye S, Fujii N and Takeoka H. 2003. Unusual aggregations of the schyphomedusa Aurelia aurita in coastal waters along western Shikoku, Japan. Plankton Biol Ecol 50, 17-21.
  24. Yoon EA, Hwang DJ, Hirose M, Kim EH, Mukai T and Park BS. 2010. Characteristics of acoustic scattering according to pulsation of the large jellyfish Nemopilema nomurai. Kor J Fish Aquat Sci 43, 551-556. (doi: 10.5657/kfas.2010.43.5.551) https://doi.org/10.5657/kfas.2010.43.5.551