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题名: Evoked-potential audiogram of an Indo-Pacific humpback dolphin (Sousa chinensis)
作者: Li, Songhai1, 2; Wang, Ding2; Wang, Kexiong2; Taylor, Elizabeth A.1; Cros, Emilie1; Shi, Wenjing2; Wang, Zhitao2; Fang, Liang2; Chen, Yuefei3; Kong, Fanming3
通讯作者: Li, Songhai ; Wang, Ding ; Wang, Kexiong ; Taylor, Elizabeth A. ; Cros, Emilie ; Shi, Wenjing ; Wang, Zhitao ; Fang, Liang ; Chen, Yuefei ; Kong, Fanming
关键词: AEP response ; hearing sensitivity ; marine mammal ; odontocete ; cetacean ; stimulus ; sound
刊名: JOURNAL OF EXPERIMENTAL BIOLOGY
发表日期: 2012-09-01
DOI: 10.1242/jeb.070904
卷: 215, 期:17, 页:3055-3063
收录类别: SCI
文章类型: Article
部门归属: [Li, Songhai; Taylor, Elizabeth A.; Cros, Emilie] Natl Univ Singapore, Trop Marine Sci Inst, Marine Mammal Res Lab, Singapore 119227, Singapore; [Li, Songhai; Wang, Ding; Wang, Kexiong; Shi, Wenjing; Wang, Zhitao; Fang, Liang] Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Chen, Yuefei; Kong, Fanming] Dolphinarium Nanning Zoo, Nanning 530003, Guangxi, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore
类目[WOS]: Biology
研究领域[WOS]: Life Sciences & Biomedicine - Other Topics
摘要: An evoked-potential audiogram was measured for an Indo-Pacific humpback dolphin (Sousa chinensis) living in the dolphinarium of Nanning Zoo, China. Rhythmic 20 ms pip trains composed of cosine-enveloped 0.25 ms tone pips at a pip rate of 1 kHz were presented as sound stimuli. The dolphin was trained to remain still at the water surface and to wear soft latex suction-cup EEG electrodes used to measure the animal's envelope-following evoked potentials to the sound stimuli. Responses to 1000 rhythmic 20 ms pip trains for each amplitude/frequency combination were averaged and analysed using a fast Fourier transform to obtain an evoked auditory response. The hearing threshold was defined as the zero crossing point of the response input-output function using linear regression. Fourteen frequencies ranging from 5.6 to 152 kHz were studied. The results showed that most of the thresholds were lower than 90 dB re. 1 mu Pa (r.m.s.), covering a frequency range from 11.2 to 128 kHz, and the lowest threshold of 47 dB was measured at 45 kHz. The audiogram, which is a function of hearing threshold versus stimulus carrier frequency, presented a U-shape with a region of high hearing sensitivity (within 20 dB of the lowest threshold) between approximately 20 and 120 kHz. At frequencies lower than this high-sensitivity region, thresholds increased at a rate of approximately 11 dB octave(-1) up to 93 dB at 5.6 kHz. The thresholds at high frequencies above 108 kHz increased steeply at a rate of 130 dB octave(-1) up to 127 dB at 152 kHz.
英文摘要: An evoked-potential audiogram was measured for an Indo-Pacific humpback dolphin (Sousa chinensis) living in the dolphinarium of Nanning Zoo, China. Rhythmic 20 ms pip trains composed of cosine-enveloped 0.25 ms tone pips at a pip rate of 1 kHz were presented as sound stimuli. The dolphin was trained to remain still at the water surface and to wear soft latex suction-cup EEG electrodes used to measure the animal's envelope-following evoked potentials to the sound stimuli. Responses to 1000 rhythmic 20 ms pip trains for each amplitude/frequency combination were averaged and analysed using a fast Fourier transform to obtain an evoked auditory response. The hearing threshold was defined as the zero crossing point of the response input-output function using linear regression. Fourteen frequencies ranging from 5.6 to 152 kHz were studied. The results showed that most of the thresholds were lower than 90 dB re. 1 mu Pa (r.m.s.), covering a frequency range from 11.2 to 128 kHz, and the lowest threshold of 47 dB was measured at 45 kHz. The audiogram, which is a function of hearing threshold versus stimulus carrier frequency, presented a U-shape with a region of high hearing sensitivity (within 20 dB of the lowest threshold) between approximately 20 and 120 kHz. At frequencies lower than this high-sensitivity region, thresholds increased at a rate of approximately 11 dB octave(-1) up to 93 dB at 5.6 kHz. The thresholds at high frequencies above 108 kHz increased steeply at a rate of 130 dB octave(-1) up to 127 dB at 152 kHz.
关键词[WOS]: WHALE PSEUDORCA-CRASSIDENS ; TURSIOPS-TRUNCATUS ; AUDITORY-THRESHOLDS ; PHOCOENA-PHOCOENA ; UNDERWATER AUDIOGRAM ; ECHOLOCATION SIGNALS ; HEARING MEASUREMENTS ; PORPOISE ; AUDIOMETRY ; CETACEANS
语种: 英语
WOS记录号: WOS:000307638700023
ISSN号: 0022-0949
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/17164
Appears in Collections:水生生物多样性与资源保护研究中心_期刊论文

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作者单位: 1.Natl Univ Singapore, Trop Marine Sci Inst, Marine Mammal Res Lab, Singapore 119227, Singapore
2.Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan 430072, Peoples R China
3.Dolphinarium Nanning Zoo, Nanning 530003, Guangxi, Peoples R China

Recommended Citation:
Li, Songhai; Wang, Ding; Wang, Kexiong; Taylor, Elizabeth A.; Cros, Emilie; Shi, Wenjing; Wang, Zhitao; Fang, Liang; Chen, Yuefei; Kong, Fanming.Evoked-potential audiogram of an Indo-Pacific humpback dolphin (Sousa chinensis),JOURNAL OF EXPERIMENTAL BIOLOGY,2012,215(17):3055-3063
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