수중음향을 이용한 노무라입깃해파리의 행동 및 음향산란특성
In situ behavioral and acoustic characteristics of the large jellyfish Nemopliema nomurai by target tracking
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초록
The aim of this study is to find out the behavior and acoustic backscattering of the large jellyfish Nemopliema nomurai using hydroacoustics in situ. N. nomurai was distributed at depths ranging from 10~15 m during the day. Regarding the behavior of N. nomurai, there was no significant change in depth, and 3D tortuosity was not high. The vertical direction was ±10° from the horizontal, and moving speed was 0.9~1.5 m s–1.With regard to hydro–acoustical characteristics, the mean TS of N. nomurai ranged from –69.6~–56.0 dB at 38 kHz and –69.4~–54.5 dB at 120 kHz. TS variation (Max TS–Min TS) at 38 and 120 kHz was 0~10.2 dB and 0.2~16.0 dB, respectively. Mean TS and TS variation (Max TS–Min TS) of N. nomurai were higher at 120 kHz than at 38 kHz. The results showed that the use of hydroacoustics was effective in estimating the distribution depth, behavior, and acoustic characteristics of the target.
Abstract
The aim of this study is to find out the behavior and acoustic backscattering of the large jellyfish Nemopliema nomurai using hydroacoustics in situ. N. nomurai was distributed at depths ranging from 10~15 m during the day. Regarding the behavior of N. nomurai, there was no significant change in depth, and 3D tortuosity was not high. The vertical direction was ±10° from the horizontal, and moving speed was 0.9~1.5 m s–1.With regard to hydro–acoustical characteristics, the mean TS of N. nomurai ranged from –69.6~–56.0 dB at 38 kHz and –69.4~–54.5 dB at 120 kHz. TS variation (Max TS–Min TS) at 38 and 120 kHz was 0~10.2 dB and 0.2~16.0 dB, respectively. Mean TS and TS variation (Max TS–Min TS) of N. nomurai were higher at 120 kHz than at 38 kHz. The results showed that the use of hydroacoustics was effective in estimating the distribution depth, behavior, and acoustic characteristics of the target.
참고문헌 (15)
- Båmstedt U, "An evaluation of acoustic and video methods to estimate the abundance and vertical distribution of jellyfish", J Plankton Res, 25, pp.1307~1318 (2003)[DOI]
- Chu D, "Inference of geometrical and behavioural parameters of individual fish from echo–trace–analysis", Deep–Sea Res Part I, 50, pp.515~527 (2003)[DOI]
- Dupont N, "Diel vertical migration of the deep–water jellyfish Periphylla periphylla simulated as individual responses to absolute light intensity", Limnol Oceanogr, 54, pp.1765~1775 (2009)
- Hirose M, "Acoustic characteristics of Nemopilema nomurai", J Marine Acoust Soc Jpn, 39, pp.34~38 (2012)
- Hirose M, "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, pp.109~118 (2007)
- Honda N, "Vertical distribution survey of the giant jellyfish Nemopilema nomurai by an underwater video camera attached to a midwater trawl net", Nippon Suisan Gakkaishi, 73, pp.1042~1048 (2007)
- Honda N, "Swimming depths of the giant jellyfish Nemopilema nomurai investigated using pop–up archival transmitting tags and ultrasonic pingers", Fish Sci, 75, pp.947~956 (2009)[DOI]
- Kaartvedt S, "Diel vertical migration of individual jellyfish(Periphylla periphylla)", Limnol Oceanogr, 52, pp.975~983 (2007)
- Klevjer TA, "Split–beam target tracking can be used to study the swimming behaviour of deep–living plankton in situ", Aquat Living Resour, 16, pp.293~298 (2003)[DOI]
- Klevjer TA, "In situ target strength and behaviour of northern krill (Meganyctiphanes norvegica)", ICES J Mar Sci, 63, pp.1726~1735 (2006)[DOI]
- Klevjer TA, "In situ behaviour and acoustic properties of the deep living jellyfish Periphylla periphylla", J Plankton Res, 31, pp.793~803 (2009)[DOI]
- Lee KH, "Measurement of swimming speed of giant jellyfish Nemopilema nomurai using acoustics and visualization analysis", Fish Sci, 76, pp.893~899 (2010)[DOI]
- 이경훈, "음향 및 광학기법을 이요한 노무라입깃해파리(Nemopilema nomurai)의 수층별 분포 관찰에 관한 연구", 한국어업기술학회지, 43(4), pp.355~361 (2007), 한국어업기술학회
- 이유원, "유영행동에 따른 대형 해파리의 음향산란 변동의 이론적 검토", 한국수산과학회지, 42(2), pp.165~170 (2009), 한국수산과학회
- 윤은아, "동중국해에서 노무라입깃해파리의 in situ 음향산란특성", 한국어업기술학회지, 48(3), pp.256~268 (2012), 한국어업기술학회