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学科主题: Acoustics
题名: Comparison between visual and passive acoustic detection of finless porpoises in the Yangtze river, China
作者: Akamatsu, T ; Wang, D ; Wang, KX ; Wei, Z
通讯作者: Akamatsu, T, Natl Res Inst Fisheries Engn, Kashiwa, Chiba 3140421, Japan
关键词: NEOPHOCAENA-PHOCAENOIDES ; ECHOLOCATION SIGNALS ; PHOCOENA-PHOCOENA ; LOCALIZATION ; DENSITY ; RANGE
刊名: JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
发表日期: 2001
卷: 109, 期:4, 页:1723-1727
收录类别: SCI
部门归属: Natl Res Inst Fisheries Engn, Kashiwa, Chiba 3140421, Japan; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
摘要: Recently, sonar signals and other sounds produced by cetaceans have been used for acoustic detection of individuals and groups in the wild. However, the detection probability ascertained by concomitant visual survey has not been demonstrated extensively. The finless porpoises (Neophocaena phocaenoides) have narrow band and high-frequency sonar signals, which are distinctive from background noises. Underwater sound monitoring with hydrophones (B&K8103) placed along the sides of a research vessel, concurrent with visual observations was conducted in the Yangtze River from Wuhan to Poyang Lake in 1998 in China. The peak to peak detection threshold was set at 133 dB re 1 mu Pa. With this threshold level, porpoises could be detected reliably within 300 m of the hydrophone. In a total of 774-km cruise, 588 finless porpoises were sighted by visual observation and 44 864 ultrasonic pulses were recorded by the acoustical observation system. The acoustic monitoring system could detect the presence of the finless porpoises 82% of the time. A false alarm in the system occurred with a frequency of 0.9%. The high-frequency acoustical observation is suggested as an effective method for field surveys of small cetaceans, which produce high-frequency sonar signals. (C) 2001 Acoustical Society of America.
WOS记录号: WOS:000167932600042
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/10016
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Akamatsu, T; Wang, D; Wang, KX; Wei, Z.Comparison between visual and passive acoustic detection of finless porpoises in the Yangtze river, China,JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,2001,109(4):1723-1727
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