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Hearing Sensation Levels of Emitted Biosonar Clicks in an Echolocating Atlantic Bottlenose Dolphin
Li, Songhai1,3; Nachtigall, Paul E.1; Breese, Marlee1; Supin, Alexander Ya.2; Li, SH (reprint author), Natl Univ Singapore, Marine Mammal Res Lab, Trop Marine Sci Inst, Singapore 117548, Singapore.
2012-01-06
Source PublicationPLOS ONE
ISSN1932-6203
Volume7Issue:1Pages:e29793
AbstractEmitted biosonar clicks and auditory evoked potential (AEP) responses triggered by the clicks were synchronously recorded during echolocation in an Atlantic bottlenose dolphin (Tursiops truncatus) trained to wear suction-cup EEG electrodes and to detect targets by echolocation. Three targets with target strengths of -34, -28, and -22 dB were used at distances of 2 to 6.5 m for each target. The AEP responses were sorted according to the corresponding emitted click source levels in 5-dB bins and averaged within each bin to extract biosonar click-related AEPs from noise. The AEP amplitudes were measured peak-to-peak and plotted as a function of click source levels for each target type, distance, and target-present or target-absent condition. Hearing sensation levels of the biosonar clicks were evaluated by comparing the functions of the biosonar click-related AEP amplitude-versus-click source level to a function of external (in free field) click-related AEP amplitude-versus-click sound pressure level. The results indicated that the dolphin's hearing sensation levels to her own biosonar clicks were equal to that of external clicks with sound pressure levels 16 to 36 dB lower than the biosonar click source levels, varying with target type, distance, and condition. These data may be assumed to indicate that the bottlenose dolphin possesses effective protection mechanisms to isolate the self-produced intense biosonar beam from the animal's ears during echolocation.; Emitted biosonar clicks and auditory evoked potential (AEP) responses triggered by the clicks were synchronously recorded during echolocation in an Atlantic bottlenose dolphin (Tursiops truncatus) trained to wear suction-cup EEG electrodes and to detect targets by echolocation. Three targets with target strengths of -34, -28, and -22 dB were used at distances of 2 to 6.5 m for each target. The AEP responses were sorted according to the corresponding emitted click source levels in 5-dB bins and averaged within each bin to extract biosonar click-related AEPs from noise. The AEP amplitudes were measured peak-to-peak and plotted as a function of click source levels for each target type, distance, and target-present or target-absent condition. Hearing sensation levels of the biosonar clicks were evaluated by comparing the functions of the biosonar click-related AEP amplitude-versus-click source level to a function of external (in free field) click-related AEP amplitude-versus-click sound pressure level. The results indicated that the dolphin's hearing sensation levels to her own biosonar clicks were equal to that of external clicks with sound pressure levels 16 to 36 dB lower than the biosonar click source levels, varying with target type, distance, and condition. These data may be assumed to indicate that the bottlenose dolphin possesses effective protection mechanisms to isolate the self-produced intense biosonar beam from the animal's ears during echolocation.
SubtypeArticle
KeywordFalse Killer Whale Mesoplodon-densirostris Neural Attenuation Tursiops-truncatus Responses Behavior Prey Porpoises Pulses Sounds
Department[Li, Songhai; Nachtigall, Paul E.; Breese, Marlee] Univ Hawaii, Marine Mammal Res Program, Hawaii Inst Marine Biol, Kailua, HI USA; [Supin, Alexander Ya.] Russian Acad Sci, Inst Ecol & Evolut, Moscow, Russia; [Li, Songhai] Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan, Peoples R China
DOI10.1371/journal.pone.0029793
WOS HeadingsScience & Technology
Funding OrganizationOffice of Naval Research[N00014-08-1-1106] ; Office of Naval Research[N00014-08-1-1106] ; Office of Naval Research[N00014-08-1-1106] ; Office of Naval Research[N00014-08-1-1106]
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000301188800038
WOS KeywordFALSE KILLER WHALE ; MESOPLODON-DENSIROSTRIS ; NEURAL ATTENUATION ; TURSIOPS-TRUNCATUS ; RESPONSES ; BEHAVIOR ; PREY ; PORPOISES ; PULSES ; SOUNDS
Funding OrganizationOffice of Naval Research[N00014-08-1-1106] ; Office of Naval Research[N00014-08-1-1106] ; Office of Naval Research[N00014-08-1-1106] ; Office of Naval Research[N00014-08-1-1106]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/16827
Collection水生生物多样性与资源保护研究中心_期刊论文
Corresponding AuthorLi, SH (reprint author), Natl Univ Singapore, Marine Mammal Res Lab, Trop Marine Sci Inst, Singapore 117548, Singapore.
Affiliation1.Univ Hawaii, Marine Mammal Res Program, Hawaii Inst Marine Biol, Kailua, HI USA
2.Russian Acad Sci, Inst Ecol & Evolut, Moscow, Russia
3.Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan, Peoples R China
Recommended Citation
GB/T 7714
Li, Songhai,Nachtigall, Paul E.,Breese, Marlee,et al. Hearing Sensation Levels of Emitted Biosonar Clicks in an Echolocating Atlantic Bottlenose Dolphin[J]. PLOS ONE,2012,7(1):e29793.
APA Li, Songhai,Nachtigall, Paul E.,Breese, Marlee,Supin, Alexander Ya.,&Li, SH .(2012).Hearing Sensation Levels of Emitted Biosonar Clicks in an Echolocating Atlantic Bottlenose Dolphin.PLOS ONE,7(1),e29793.
MLA Li, Songhai,et al."Hearing Sensation Levels of Emitted Biosonar Clicks in an Echolocating Atlantic Bottlenose Dolphin".PLOS ONE 7.1(2012):e29793.
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