어군의 3차원 음향 산란 특성 측정

Title
어군의 3차원 음향 산란 특성 측정
Alternative Title
Measuring the three-dimensional acoustic scattering pattern of a fish school using hemisphere coordinates
Author(s)
이창원; 강돈혁; 라형술; 조성호; 명정구
KIOST Author(s)
Kang, Don Hyug(강돈혁)Myoung, Jung Goo(명정구)
Publication Year
2008-06-16
Abstract
Although various echo-sounders have been used to quantify biomass in fisheries acoustics, the systems used are inherently limited by a narrow acoustic detection area. Recently, various sonar systems have been increasingly used in fisheries acoustics to study school structure and behavior, and for estimating abundance. The three-dimensional (3D) acoustic scattering by a fish school provides indispensable information for fisheries acoustics using sonar systems. We measured the 3D acoustic scattering from a live fish school using a fixed source and moving receiving system. To construct a fish school, 70 black porgy (Acanthopagrus schlegeli) with total lengths ranging from 9 to 14 cm were placed in a small cage underwater. As the source signal, a 200-kHz transducer was positioned such that the fish school was located on the beam axis. The echoes from the fish school were received with a hydrophone at each angle using hemisphere coordinates. On combining the corresponding scattering target strength functions of the fish school, the 3D scattering pattern has no changed with receiving angles. These results can contribute to converting the volume backscattering strength of a fish school to fish biomass by considering fish school direction in 3D coordinates.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29894
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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