Exploratory Study for Acoustical Species Identification of Anchovies in the South Sea of South Korea
文献类型： 外文期刊
作者： Kang, Myounghee 1 ; Zhang, Hui 2 ; Seo, Young Il 3 ; Oh, Taeg Yun 3 ; Jo, Hyun-Su 4 ;
作者机构： 1.Gyeongsang Natl Univ, Inst Marine Ind, Dept Maritime Police & Prod Syst, 38 Cheondaegukchi Gil, Tongyeong Si 53064, Gyeongsangnam D, South Korea
2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Minist Agr China, Key Lab Freshwater Biodivers Conservat, 8,1st Wudayuan Rd, Wuhan 430223, Peoples R China
3.Natl Inst Fisheries Sci, Fisheries Resources Management Div, Busan, South Korea
4.Kunsan Natl Univ, Dept Marine Sci & Prod, Gunsan Si, Jeollabuk Do, South Korea
关键词： Species identification; Anchovy; Echosounder; South Korea
期刊名称：THALASSAS （ 影响因子：0.62； 五年影响因子：0.64 ）
ISSN： 0212-5919
年卷期： 2016 年 32 卷 2 期
页码：
收录情况： SCI
摘要： We conducted a hydroacoustic-trawl survey from April 16-19, 2013, for acoustical identification of anchovies in the South Sea of South Korea. Three types of fish schools were defined on the basis of the trawl results: L7 (schools mixed with 57 % hairtail and 37 % anchovy), L8 (schools with 95 % anchovy), and L1 (schools with unknown species). According to the results, the bathymetric characteristics (school depth, water depth, and altitude) of L1 were similar to those of L7; however, the morphometric characteristics (length, height, area, and image compactness) of L1 were similar to those of L8. To confirm whether L1 was more similar to L8 or L7, we used the Delta MVBS method [where Delta MVBS is difference of mean volume backscattering strength (MVBS) at 38 and 120 kHz] with three cell sizes, 0.1 nmi x 2 m, 0.25 nmi x 4 m, and 0.5 nmi x 5 m; the Delta MVBS pattern of L1 seemed similar to that of L8, but not that of L7. By using one-way analysis of variance, we noted significant differences of frequency characteristics between L7 and L8 and L7 and L1, supporting the results of the Delta MVBS method. Moreover, only 0.1 nmi x 2 m and 0.25 nmi x 4 m were the appropriate cell sizes for anchovy species identification. This exploratory study may form the basis for other species identification.
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