Browse > Article
http://dx.doi.org/10.5657/kfas.2009.42.2.165

Theoretical Examination of the Effects of Fluctuation of Acoustic Scattering on the Swimming Behavior of Giant Jellyfish  

Lee, You-Won (Division of Marine Production System Management, Pukyong National University)
Hwang, Bo-Kyu (Research Center for Ocean Industry Development, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.42, no.2, 2009 , pp. 165-170 More about this Journal
Abstract
Recently, wide spread distribution of the giant jellyfish, Nemopilema nomurai, has occurred in the East China Sea. This increased distribution has caused serious problems in inshore and offshore fisheries in Korea and Japan. As a result, it is necessary to evaluate the damage caused to the fisheries by jellyfish. Accordingly, several hydroacoustic studies have been conducted to estimate the target strength (TS) of the giant jellyfish. However, the effects of fluctuation in the acoustic scattering characteristics on swimming patterns have not yet been elucidated. Therefore, in this study, we theoretically estimated the effects of changes in the acoustic scattering pattern on the swimming behavior of jellyfish using the Distorted Wave Born Approximation (DWBA) model. The results confirmed that acoustic scattering of jellyfish results in a significant change in their swimming pattern. Specifically, our theoretical estimation indicated that the TS of giant jellyfish (d=40 cm) fluctuated until 8.5 dB at 38 kHz, 13.8 dB at 70 kHz, and 15.1 dB at 120 kHz based on changes in their swimming patterns.
Keywords
Giant jellyfish; Target strength; Swimming motion; DWBA model;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Chu, D., P.H. Weibe, T.K. Stanton, T.R. Hammer, K.W. Doherty, N.J. Copley, J. Zhang, D.B. Reeder and M.C. Benfield. 2000. Measurement of the material properties of live marine organism and their influence on acoustic scattering. Proceedings of the oceans 2000 Rhode island MTS/IEEE, 3, 1963-1967
2 McGehee, D.E., R.L. O'Driscoll and L.V.M. Traykovski. 1998. Effects of orientation on acoustic scattering from antarctic krill at 120 kHz. Deep-Sea Res. II, 45, 1273-1294   DOI   ScienceOn
3 Nakada, K. 2001. Calling behavior by virgin diacamma worker. Movie achives of animal behavior data No: momo031013sn01b. (http://www.momo-p.com/showdetail-e.php?movieid=momo031013sn01b)
4 Warren, J.D. and J.N. Smith. 2007. Density and sound speed of two gelatinous zoopklankton: Ctenophore (Mnemiopsis leidyi) and lion's mane jellyfish (Cyanea capillata). J. Acoust. Soc. Am., 122, 574-580   DOI   ScienceOn
5 Hirose, M., T. Mukai, T. Simura, J. Yamamoto and K. Iida. 2007. Measurement of specific density and sound speed in Nomura's jelly fish Nemopilema nomurai to estimate their target strength. J. Marine Acoust. Soc. Jpn., 34, 37-46
6 Hirose, M., T. Mukai, D.J. Hwang and K. Iida. 2005. Target strength measurements on tethered live jellyfish Nemopilema nomurai. Nippon Suisan Gakkaishi, 71, 571-577   DOI   ScienceOn
7 Lee, K.H., I.O. Kim, W.D. Yoon, J.K. Shin and H.C. An. 2006. A study on vertical observation of giant jellyfish (Nemopilema nomurai) using acoustical and optical methods. J. Kor. Fish. Tech., 43, 355-361
8 Matsusita, Y., N. Honda and S. Kawamura. 2005. Design and tow trial JET (Jellyfish Excluder for Towed fishing gear). Nippon Suisan Gakkaishi, 71, 965-967   DOI   ScienceOn
9 Honda, N., Y. Matsusita, T. Watanabe and H. Iizumi. 2005. The countermeasures for migrating impacts of the giant jellyfish Nemopilema nomurai to fishing industries. Nippon Suisan Gakkaishi, 71, 975-976   DOI   ScienceOn
10 Furusawa, M., T. Asami and E. Hamada. 1994. Prediction of krill target strength by liquid prolate spheroid model. Fish. Sci., 60, 261-265   DOI
11 Demer, D.A. and S.G. Conti. 2003. Reconciling theoretical versus empirical target strength of krill: effects of phase variability on the distorted-wave born approximation. ICES J. Mar. Sci., 60, 429-434   DOI   ScienceOn
12 Mutru, 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   ScienceOn
13 Honda, N. and T. Watanabe. 2007. Observation of the giant jellyfish Nemopilaema nomurai using an underwater acoustic camera. Nippon Suisan Gakkaishi, 73, 919-921   DOI   ScienceOn
14 Amakasu, K. and M. Furusawa. 2006. The target strength of Antarctic krill (Euphausia superba) measured by the split-beam method in a small tank at 70 kHz. ICES J. Mar. Sci., 63, 36-45   DOI   ScienceOn
15 Clay, C.S. and J.K. Horne. 1994. Acoustic models of fish: the Atlantic cod (Gadus morhua). J. Acoust. Soc. Am., 96, 1661-1668   DOI   ScienceOn
16 National Fisheries Research & Development Institute (NFRDI). 2005. Annual report of jellyfish research. Report of NFRDI, 1-117
17 Kim, I.O., H.C. An, J.K. Shin and B.J. Cha. 2008. The development of basic structure of jellyfish separator system for a trawl net. J. Kor. Soc. Fish. Tech., 44, 99-111   DOI   ScienceOn