Estimation of the detection probability for Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis) with a passive acoustic method

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	Estimation of the detection probability for Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis) with a passive acoustic method
	Akamatsu, T.1; Wang, D.2; Wang, K.2; Li, S.2; Dong, S.2; Zhao, X.2; Barlow, J.3; Stewart, B. S.4; Richlen, M.5
刊名	JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
	2008-06-01
卷号	123 期号:6 页码:4403-4411
关键词	SPERM-WHALE ABUNDANCE HARBOR PORPOISE HUMPBACK WHALES DATA LOGGER WATERS CETACEANS SEA PACIFIC ECHOLOCATION DOLPHINS
ISSN号	0001-4966
通讯作者	Akamatsu, T, Fisheries Res Agcy, NRIFE, Kamisu, Ibaraki 3140408, Japan
中文摘要	Yangtze finless porpoises were surveyed by using simultaneous visual and acoustical methods from 6 November to 13 December 2006. Two research vessels towed stereo acoustic data loggers, which were used to store the intensity and sound source direction of the high frequency sonar signals produced by finless porpoises at detection ranges up to 300 m on each side of the vessel. Simple stereo beam forming allowed the separation of distinct biosonar sound source, which enabled us to count the number of vocalizing porpoises. Acoustically, 204 porpoises were detected from one vessel and 199 from the other vessel in the same section of the Yangtze River. Visually, 163 and 162 porpoises were detected from two vessels within 300 m of the vessel track. The calculated detection probability using acoustic method was approximately twice that for visual detection for each vessel. The difference in detection probabilities between the two methods was caused by the large number of single individuals that were missed by visual observers. However, the sizes of large groups were underestimated by using the acoustic methods. Acoustic and visual observations complemented each other in the accurate detection of porpoises. The use of simple, relatively inexpensive acoustic monitoring systems should enhance population surveys of free-ranging, echolocating odontocetes. (C) 2008 Acoustical Society of America.
英文摘要	Yangtze finless porpoises were surveyed by using simultaneous visual and acoustical methods from 6 November to 13 December 2006. Two research vessels towed stereo acoustic data loggers, which were used to store the intensity and sound source direction of the high frequency sonar signals produced by finless porpoises at detection ranges up to 300 m on each side of the vessel. Simple stereo beam forming allowed the separation of distinct biosonar sound source, which enabled us to count the number of vocalizing porpoises. Acoustically, 204 porpoises were detected from one vessel and 199 from the other vessel in the same section of the Yangtze River. Visually, 163 and 162 porpoises were detected from two vessels within 300 m of the vessel track. The calculated detection probability using acoustic method was approximately twice that for visual detection for each vessel. The difference in detection probabilities between the two methods was caused by the large number of single individuals that were missed by visual observers. However, the sizes of large groups were underestimated by using the acoustic methods. Acoustic and visual observations complemented each other in the accurate detection of porpoises. The use of simple, relatively inexpensive acoustic monitoring systems should enhance population surveys of free-ranging, echolocating odontocetes. (C) 2008 Acoustical Society of America.
学科主题	Acoustics
WOS标题词	Science & Technology ; Technology ; Life Sciences & Biomedicine
类目[WOS]	Acoustics ; Audiology & Speech-Language Pathology
研究领域[WOS]	Acoustics ; Audiology & Speech-Language Pathology
关键词[WOS]	SPERM-WHALE ABUNDANCE ; HARBOR PORPOISE ; HUMPBACK WHALES ; DATA LOGGER ; WATERS ; CETACEANS ; SEA ; PACIFIC ; ECHOLOCATION ; DOLPHINS
收录类别	SCI
语种	英语
WOS记录号	WOS:000256730900038
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/8094]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Fisheries Res Agcy, NRIFE, Kamisu, Ibaraki 3140408, Japan 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China 3.SW Fisheries Sci Ctr, NOAA Fisheries, La Jolla, CA 92037 USA 4.Hubbs SeaWorld Res Inst, San Diego, CA 92109 USA 5.Univ Hawaii, Dept Zool, Honolulu, HI 96822 USA
推荐引用方式 GB/T 7714	Akamatsu, T.,Wang, D.,Wang, K.,et al. Estimation of the detection probability for Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis) with a passive acoustic method[J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,2008,123(6):4403-4411.
APA	Akamatsu, T..,Wang, D..,Wang, K..,Li, S..,Dong, S..,...&Richlen, M..(2008).Estimation of the detection probability for Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis) with a passive acoustic method.JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,123(6),4403-4411.
MLA	Akamatsu, T.,et al."Estimation of the detection probability for Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis) with a passive acoustic method".JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 123.6(2008):4403-4411.