수산음향기법을 이용한 아산만 멸치(Engraulis japonicus)와 기타어군의 분포 및 현존량 추정 KCI

Title
수산음향기법을 이용한 아산만 멸치(Engraulis japonicus)와 기타어군의 분포 및 현존량 추정
Alternative Title
Distribution and Abundance of Japanese Anchovy Engraulis japonicus and Other Fishes in Asan Bay, Korea, estimated Hydroacoustic Survey
Author(s)
이형빈; 강돈혁; 임양재; 이경훈
KIOST Author(s)
Kang, Don Hyug(강돈혁)
Publication Year
2014-10
Abstract
The distribution and abundance of coastal fish species in Asan Bay, Korea, were estimated from hydroacoustic survey and net catches. Acoustic data were collected with 38 and 200 kHz from July to October of 2012, and converted to the nautical area scattering coefficient (NASC, m2/mile2 ) for 0.25n⋅mile along ten transects. Japanese anchovy Engraulis japonicus was the dominant specie in the net catches. The virtual echogram technique was used to distinguish E. japonicus from other species based on the differences in the mean volume backscattering strength ( ΔMVBS ) at 38 and 200 kHz. Engraulis japonicus and other fishes are mainly distributed in the center channel and outer part of Asan Bay. E. japonicus tends to move from inner to outer Asan Bay in summer and fall. From NASC data, the target strength and length-weight function of E. japonicus and other fishes were used to estimate the E. japonicus stock at 24.1-93.3 tons, and other fish at 40.6-88.4 tons from July to October 2012. The estimated anchovy biomass compared well with the cumulative catch weight from stow net catches. The hydroacoustic method offers an approach to understanding spatial/temporal structure and estimating the biomass of fish aggregations in coastal areas.
ISSN
0374-8111
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1580
Bibliographic Citation
한국수산과학회지, v.47, no.5, pp.674 - 681, 2014
Publisher
한국수산과학회
Keywords
Hydroacoustic survey; Asan bay; Engraulis japonicus; Spatial/temporal distribution; Stock assessment
Type
Article
Language
Korean
Publisher
한국수산과학회
Related Researcher
Research Interests

Marine security,Underwater Acoustics,해양방위,수중음향

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