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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; Akamatsu, T, Fisheries Res Agcy, NRIFE, Kamisu, Ibaraki 3140408, Japan
2008-06-01
Source PublicationJOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
ISSN0001-4966
Volume123Issue:6Pages:4403-4411
AbstractYangtze 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.; 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.
SubtypeArticle
KeywordSperm-whale Abundance Harbor Porpoise Humpback Whales Data Logger Waters Cetaceans Sea Pacific Echolocation Dolphins
Department[Akamatsu, T.] Fisheries Res Agcy, NRIFE, Kamisu, Ibaraki 3140408, Japan; [Wang, D.; Wang, K.; Li, S.; Dong, S.; Zhao, X.] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Barlow, J.] SW Fisheries Sci Ctr, NOAA Fisheries, La Jolla, CA 92037 USA; [Stewart, B. S.] Hubbs SeaWorld Res Inst, San Diego, CA 92109 USA; [Richlen, M.] Univ Hawaii, Dept Zool, Honolulu, HI 96822 USA
Subject AreaAcoustics
DOI10.1121/1.2912449
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaAcoustics ; Audiology & Speech-Language Pathology
WOS SubjectAcoustics ; Audiology & Speech-Language Pathology
WOS IDWOS:000256730900038
WOS KeywordSPERM-WHALE ABUNDANCE ; HARBOR PORPOISE ; HUMPBACK WHALES ; DATA LOGGER ; WATERS ; CETACEANS ; SEA ; PACIFIC ; ECHOLOCATION ; DOLPHINS
Citation statistics
Cited Times:38[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8094
Collection期刊论文
Corresponding AuthorAkamatsu, T, Fisheries Res Agcy, NRIFE, Kamisu, Ibaraki 3140408, Japan
Affiliation1.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
Recommended Citation
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..,...&Akamatsu, T, Fisheries Res Agcy, NRIFE, Kamisu, Ibaraki 3140408, Japan.(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.
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