북태평양 연안의 멸치 음향 산란강도 특성

Title
북태평양 연안의 멸치 음향 산란강도 특성
Alternative Title
Hydroacoustic ex situ target strength measurements on Japanese anchovy (Engraulis japonicus) in the coastal water of Northwest Pacific Ocean
Author(s)
강돈혁; 조성호; 이창원; 명정구; 나정열
KIOST Author(s)
Kang, Don Hyug(강돈혁)Myoung, Jung Goo(명정구)
Alternative Author(s)
강돈혁; 이창원; 명정구
Publication Year
2008-06-16
Abstract
Japanese anchovy (Engraulis japonicus) is one of important species, as the fisheries resources and ecological niche, in the coastal areas of the northwestern Pacific Ocean. Hydroacoustic ex situ target strength (TS) measurements of the live fish were made using 38, 120, and 200 kHz split-beam echo-sounder. The study examined 35 anchovy from small and adult size; total length ranged from 4.8 to 12.2 cm. TS experiments has been conducted under the tethered method with very small hooks that were attached to the mouth. Simultaneously with the acoustic measurements, underwater video camera was used to continuously monitor behavior and tilt angle. The standard fit regressions of TS on total length (TL, cm) were follows: TS38kHz= 20 log [TL] – 65.8 (r=0.91), TS120kHz = 20 log [TL] – 68.4 (r=0.92), and TS200kHz = 20 log [TL] – 69.1 (r=0.84). In case of fish wet weight W (g), best fit equations were follows; TS38kHz = 5.1 log [W] – 50.5 (r=0.92), TS120kHz = 4.9 log [W] – 53.0 (r=0.95), TS200kHz = 4.6 log [W] – 53.6 (r=0.89). Additionally, the mean swimming angle and standard deviation were 9.1  13.1. The results of ex situ measurements provided essential information for studying TS of Japanese anchovy for acoustic survey and thus improve the accuracy of anchovy biomass estimates.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29895
Bibliographic Citation
ICES Symposium on the Ecosystem Approach with Fisheries Acoustics and Complementary Technologies, pp.1 - 12, 2008
Publisher
International Council for the Exploration of the Sea
Type
Conference
Language
English
Publisher
International Council for the Exploration of the Sea
Related Researcher
Research Interests

Fish ecology,Fish taxonomy,Fish stock enhancement,어류생태,어류분류,어류자원증식

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