북서 태평양 멸치(Japanese anchovy)에 대한 측면 음향 반사강도 특성 KCI

Title
북서 태평양 멸치(Japanese anchovy)에 대한 측면 음향 반사강도 특성
Alternative Title
In situ side-aspect target strength of Japanese anchovy (Engraulis japonicus) in northwestern Pacific Ocean
Author(s)
이형빈; 강돈혁
KIOST Author(s)
Kang, Don Hyug(강돈혁)
Publication Year
2010-08
Abstract
Acoustic side-aspect target strength (TS) of living Japanese anchovy (Engraulis japonicus) was measured at 120 kHz during in situ experiments. The data were collected by lowering and horizontally projecting the split-beam transducer into the anchovy school. For analysis and interpretation of the side-aspect TS data, acoustic theoretical model, based on the fish morphology, and dorsal-aspect TS data were used. Total length of the anchovy ranged from 6.6 to 12.8 cm (mean length 9.3 cm). The side-aspect TS distributed between -40 and -55 dB, has an obvious length dependency. The mean side-aspect TS of the anchovy was -47.8 dB, and the TS was about 2 dB higher than mean TS generated from dorsal-aspect measurements. With reference to maximum TS, the results of the side-aspect TS were distributed within the range of the theoretical and dorsal-aspect TS. Apparently these tendency indicates that side-aspect TS measured from the study is useful data. These in situ measurements of side-aspect TS can be applied to improve acoustic detection and estimates of the anchovy, and is necessary to measure with a various frequency and length for making enhance data.
ISSN
2671-9940
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3669
Bibliographic Citation
수산해양기술연구, v.46, no.3, pp.248 - 256, 2010
Publisher
한국수산해양기술학회
Keywords
Acoustic model; Anchovy (Engraulis japonicus); In situ measurement; Side-aspect Target strength
Type
Article
Language
Korean
Publisher
한국수산해양기술학회
Related Researcher
Research Interests

Marine security,Underwater Acoustics,해양방위,수중음향

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