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Species identification of Chinese sturgeon using acoustic descriptors and ascertaining their spatial distribution in the spawning ground of Gezhouba Dam

文献类型： 外文期刊

作者： Tao JiangPing 1 ; Qiao Ye 1 ; Tan XiChang 3 ; Chang JianBo 1 ;

作者机构： 1.Minist Water Resources, Inst Hydroecol, Wuhan 430079, Peoples R China

2.Chinese Acad Sci, Wuhan 430079, Peoples R China

3.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430071, Peoples R China

4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

5.Chinese Acad Fishery Sci, Pearl River Fishery Res Inst, Guangzhou 510380, Guangdong, Peoples R China

关键词： hydroacoustics;fisheries acoustics;echo-signal;species identification;Chinese sturgeon;spatial distribution

期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）

ISSN： 1001-6538

年卷期： 2009 年 54 卷 21 期

页码：

收录情况： SCI

摘要： This study has developed an improved subjective approach of classification in conjunction with Step wise DFA analysis to discriminate Chinese sturgeon signals from other targets. The results showed that all together 25 Chinese sturgeon echo-signals were detected in the spawning ground of Gezhouba Dam during the last 3 years, and the identification accuracy reached 90.9%. In Stepwise DFA, 24 out of 67 variables were applied in discrimination and identification. PCA combined with DFA was then used to ensure the significance of the 24 variables and detailed the identification pattern. The results indicated that we can discriminate Chinese sturgeon from other fish species and noise using certain descriptors such as the behaviour variables, echo characteristics and acoustic cross-section characteristics. However, identification of Chinese sturgeon from sediments is more difficult and needs a total of 24 variables. This is due to the limited knowledge about the acoustic-scattering properties of the substrate regions. Based on identified Chinese sturgeon individuals, 18 individuals were distributed in the region between the site of Gezhouba Dam and Miaozui reach, with a surface area of about 3.4 km(2). Seven individuals were distributed in the region between Miaozui and Yanshouba reach, with a surface area of about 13 km(2).

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