중심 주파수 200 kHz의 과학어군탐지기를 활용한 전갱이의 광대역 주파수 특성
Ex situ combined in situ target strength of Japanese horse mackerel using a broadband echosounder
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
최근, 국내 전갱이 어업 생산량은 지속적으로 감소하는 추세를 보이고 있다. 전갱이의 지속 가능한 어업을 하기 위해서 전갱이의 TS를 측정하여 현존량을 파악하는 것과 생태학적인 특성을 연구하는 것은 중요하다고 할 수 있다. 현재까지 전갱이 종을 대상으로 광대역 주파수를 활용하여 TS 연구는 전무한 실정이다. 따라서, 이 연구에서는 세계 최초로 광대역 주파수(명목 중심 주파수: 200 kHz, 160~260 kHz)와 수중 카메라를 동기화시켜 전갱이의 체장(16.8~35.5 cm) 및 유영 자세각에 따른 TS 값을 구하였다. 전갱이 체장과 체중의 관계식은 체장이 커질수록 체중이 늘어나는 일반적인 경향을 보였다. 체장별 주파수 스펙트럼의 평균선 패턴은 전반적으로 체장과 무관하게 유사한 경향을 보이고 주파수에 대한 큰 변동은 보이지 않았다. 다만, 최저 TS 값은 243 kHz, 최고 TS 값은 180과 257.5 kHz에서 관찰되었다. 유영 자세각에 대한 주파수 스펙트럼은 자세각 –5, 0, 30, 60, 75, 80°에서 주파수 스펙트럼이 평이한 것이 관찰되었으며 유영 자세각에 대한 보다 일반적인 주파수 스펙트럼의 경향이 보기 어려웠다. 이 연구의 결과는 전갱이의 생물량 추정 및 생태 연구에 기초 자료로 활용될 것으로 기대한다.
Abstract
Recently, domestic fishing production of Japanese horse mackerel has been continuously decreasing. To achieve sustainable fishing of this species, it is essential to acquire its target strength (TS) for accurate biomass estimation and to study its ecological characteristics. To date, there has been no TS research using a broadband echosounder targeting Japanese horse mackerel. In this study, for the first time, we synchronized an underwater camera with a broadband frequency (nominal center frequency of 200 kHz, range: 160-260 kHz) to measure the TS according to the body size (16.8-35.5 cm) and swimming angle of the species. The relationship between Japanese horse mackerel length and body weight showed a general tendency for body weight to increase as length increased. The pattern of the frequency spectra (average values) by body length exhibited a similar trend regardless of body length, with no significant fluctuations in frequency observed. The lowest TS value was observed at 243 kHz while the highest TS values were recorded at 180 and 257.5 kHz. The frequency spectra for the swimming angles appeared to be flat at angles of –5, 0, 30, 60, 75, and 80° while detecting more general trends of frequency spectra for swimming angle proved challenging. The results of this study can serve as fundamental data for Japanese horse mackerel biomass estimation and ecological research.
참고문헌 (38)
- "Quantitative processing of broadband data as implemented in a scientific split beam echosounder"[URL]
- Benoit–Bird KJ, "Exploring the promise of broadband fisheries echosounders for species discrimination with quantitative assessment of data processing effects", J Acoust Soc Am, 147, pp.411~427 (2020)[DOI]
- Bertrand A, "In situ acoustic target-strength measurement of bigeye (Thunnus obesus)and yellowfin tuna (Thunnus albacares) by coupling split-beam echosounder observations and sonic tracking", ICES J Mar Sci, 60, pp.51~60 (1999)[DOI]
- Cha HK, "Reproduction of the jack mackerel, Trachurus japonicus Temminck et Schlegel in the coastal waters around Jeju Island, Korea : Maturation and spawning", Bull Korean Soc Fish Tech, 45, pp.243~250 (2009)[DOI]
- Choi JH, "Target Strength According to Tilt Angle and Length of Black Seabream Acanthopagrus schlegeli at 200 kHz-frequency", Korean J Fish Aquat Sci, 51, pp.566~570 (2018)[DOI]
- Demer DA, "Evaluation of a wideband echosounder for fisheries and marine ecosystem science", ICES Coop Res Rep, 336, pp.1~79 (2017)
- Dunning J, "A new in-situ method to estimate fish target strength reveals high variability in broadband measurements", Fish Res, 261, pp.106611~ (2023)[DOI]
- "Website on total allowable catch" (2024)[URL]
- Foote KG, "Calibration of acoustic instruments for fish density estimation : A practical guide", ICES CRR, 144, pp.2707~7144 (1987)[DOI]
- Gauthier S, "Target Strength of encaged Atlantic redfish(Sebastes spp. )", ICES J Mar Sci, 58, pp.562~568 (2001)[DOI]
- Hazen EL, "Comparing the modelled and measured target-strength variability of walleye pollock, Theragra chalcogramma", ICES J Mar Sci, 61, pp.363~377 (2004)[DOI]
- Horne JK, "The influence of ontogeny, physiology, and behaviour on the target strength of walleye pollock(Theragra chalcogramma)", ICES J Mar Sci, 60, pp.1063~1074 (2003)[DOI]
- Huh SH, "Feeding habits of jack mackerel, Trachurus japonicus, collected from the Nakdong river estuary", Bull Korean Soc Fish Tech, 34, pp.320~327 (1998)
- Hwang BK, "Acoustic target strength measurements on immobile riverine shrimp, oriental river prawn(Macrobrachium koreana), in freshwater", J Kor Soc Fish Tech, 44, pp.37~45 (2008)[DOI]
- Hwang KS, "First trial of the state of the art acoustic systems mounted on the R", V Tamgu 21, 2016, pp.49, 509~515
- Hwang KS, "Multifrequency acoustic scattering characteristics of jack mackerel by KRM model", J Kor Soc Fish Technol, 51, pp.424~431 (2015)[DOI]
- Jech JM, "Three-dimensional visualization of fish morphometry and acoustic backscatter", J Acoust Soc Am, 3, pp.35~40 (2002)[DOI]
- Kang DH, "Acoustic Target Strength of Live Japanese Common Squid(Todarodes pacifica)for Applying Biomass Estimation", J Kor Fish Soc, 37, pp.345~353 (2004)[DOI]
- Kang DH, "Study on the Backscattered Signal of Swimbladdred Fish : Target Strength due to Length and Behavior of Red Seabream(Pagrus Major)", J Acoust Soc Kr, 20, pp.100~109 (2001)
- Kang DH, "Acoustic Target Strength Characteristics of Two Species of Multiple Jellyfishes, Aurelia aurita and Cyanea nozakii, in the Southern Coast of Korea", Ocean Polar Res, 32, pp.113~122 (2010)[DOI]
- Kawauchi Y, "Target strength measurement of free-swimming jack mackarel using an indoor large experimental tank", Nippon Suisan Gakkaishi, 85, pp.2~16 (2019)[DOI]
- Kim HY, "Diet composition of juvenile Trachurus japonicus in the coastal waters of Geumodo Yeosu, Korea", J Korean Soc Fish Technol, 51, pp.637~643 (2015)[DOI]
- Lavery AC, "Exploiting signal processing approaches for broadband echosounders", ICES J Mar Sci, 74, pp.2262~2275 (2017)[DOI]
- Lee DJ, "Fish length dependence of acoustic target strength for 12 dominant fish species caught in the Korean waters at 75 kHz", J Kor Soc Fish Tech, 41, pp.296~305 (2005)[DOI]
- Lee HB, "In situ side-aspect target strength of Japanese anchovy(Engraulis japonicus)in northwestern Pacific Ocean", J Kor Soc Fish Tech, 46, pp.248~256 (2010)[DOI]
- Nakamura T, "Acoustic scattering properties of juvenile jack mackerel Trachurus japonicus based on a scattering model and ex situ target strength measurements", Nippon Suisan Gakkaishi, 79, pp.345~354 (2013)[DOI]
- "Website on Biodiversity information" (2024)[URL]
- O’Driscoll RL, "In situ acoustic target strength of juvenile capelin", ICES J Mar Sci, 58, pp.342~345 (2001)[DOI]
- Park MS, "Variation of target strength by swimming orientation and size for Pacific herring(Clupea pallasii)at the frequency of 70-kHz", J Korean Soc Fish Tech, 53, pp.396~403 (2017)[DOI]
- Sawada K, "Target-strength, length, and tilt-angle measurements of Pacific saury(Cololabis saira)and Japanese anchovy(Engraulis japonicus)using an acousticoptical system", ICES J Mar Sci, 66, pp.1212~1218 (2009)[DOI]
- Scoulding B, "Target strengths of two abundant mesopelagic fish species", The J Acoust Soc Ame, 137, pp.989~1000 (2015)[DOI]
- Simmonds J, "Fisheries Acoustics:theory and practice", pp.437~ (2005), Blackwell Science
- Stanton TK, "Calibration of broadband active acoustic system using a single standard spherical target", J Acoust Soc Am, 124, pp.128~136 (2008)[DOI]
- "Fishery production survey" (2024)[URL]
- Tong J, "Impacts of Morphological Characteristics on Target Strength of Chub Mackerel(Scomber japonicus)in the Northwest Pacific Ocean", Front Mar Sci, 9, pp.2296~7745 (2022)[DOI]
- Yamanaka Y, "Measurement of Directivity Pattern of Target Strength of Japanese Horse Mackerel by Split-beam Echo Sounder", Nippon Suisan Gakkaishi, 65, pp.414~418 (1999)[DOI]
- Yan N, "Broadband target strength of arabesque greenling, Pacific sand lance, and pointhead flounder", ICES J Mar Sci, 81, pp.195~203 (2024)[DOI]
- Zhang H, "Acoustic Target Strength of the Endangered Chinese Sturgeon(Acipenser sinensis)by Ex Situ Measurements and Theoretical Calculations", Appl Sci, 8, pp.2554~ (2018)[DOI]