Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China
Vocalizations of a wild finless porpoise (Neophocaena asiaeorientalis sunmeri) were recorded within the dolphin natural reserve, in the western coast of the Taiwan Strait, China. The subsequent acoustical analyses suggested that the porpoise (N. p. sunameri) produced typical phocoenid clicks, with t...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
AMER SCIENTIFIC PUBLISHERS
2017
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/76253 |
| _version_ | 1848763654638403584 |
|---|---|
| author | Song, Zhongchang Zhang, Yu Wang, Xianyan Wei, Chong Wu, Fuxing Miao, Xing |
| author_facet | Song, Zhongchang Zhang, Yu Wang, Xianyan Wei, Chong Wu, Fuxing Miao, Xing |
| author_sort | Song, Zhongchang |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Vocalizations of a wild finless porpoise (Neophocaena asiaeorientalis sunmeri) were recorded within the dolphin natural reserve, in the western coast of the Taiwan Strait, China. The subsequent acoustical analyses suggested that the porpoise (N. p. sunameri) produced typical phocoenid clicks, with the peak frequency ranging from 123.4 to 141.4 kHz, averaging at 132.8±4.02 kHz (n = 193). The durations of these typical signals ranged from 97 to 130 microseconds, averaging at 111.6±8.49 (n = 193) microseconds. The 3 dB bandwidth had a scope from 5.8 to 15.6 kHz, averaging at 10.49±1.84 kHz (n = 193). For typical clicks, the energy converged on a narrowband frequency range with peak frequency over 120 kHz. The acoustic parameters of the signals were compared with those of signals emitted by finless porpoises from other living regions. Besides, the broadband clicks were also recorded and reported here. The sound energy was more diffuse in frequency domain for the broadband clicks than typical narrowband ones, extending to below 50 kHz and above 180 kHz. During the recordings, the reverberations influenced the signals, shown in both time and frequency domains. The reverberations could disperse the energy of the original narrowband and broadband clicks into several peak frequency ranges. For the signals used by porpoise for echolocation, the noise caused by man-made activities could influence the marine mammal negatively. The researches into porpoise's signals could provide references to protect the animal. |
| first_indexed | 2025-11-14T11:06:54Z |
| format | Journal Article |
| id | curtin-20.500.11937-76253 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:06:54Z |
| publishDate | 2017 |
| publisher | AMER SCIENTIFIC PUBLISHERS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-762532019-09-12T06:48:42Z Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China Song, Zhongchang Zhang, Yu Wang, Xianyan Wei, Chong Wu, Fuxing Miao, Xing Science & Technology Physical Sciences Technology Chemistry, Applied Energy & Fuels Materials Science, Biomaterials Chemistry Materials Science Finless Porpoise Vocalization Broadband Click Peak Frequency BAIJI LIPOTES-VEXILLIFER ECHOLOCATION SIGNALS ACETYLCHOLINESTERASE BIOSENSOR PHOCAENOIDES PROPAGATION DOLPHINS SOUND BEAM TRANSMISSION Vocalizations of a wild finless porpoise (Neophocaena asiaeorientalis sunmeri) were recorded within the dolphin natural reserve, in the western coast of the Taiwan Strait, China. The subsequent acoustical analyses suggested that the porpoise (N. p. sunameri) produced typical phocoenid clicks, with the peak frequency ranging from 123.4 to 141.4 kHz, averaging at 132.8±4.02 kHz (n = 193). The durations of these typical signals ranged from 97 to 130 microseconds, averaging at 111.6±8.49 (n = 193) microseconds. The 3 dB bandwidth had a scope from 5.8 to 15.6 kHz, averaging at 10.49±1.84 kHz (n = 193). For typical clicks, the energy converged on a narrowband frequency range with peak frequency over 120 kHz. The acoustic parameters of the signals were compared with those of signals emitted by finless porpoises from other living regions. Besides, the broadband clicks were also recorded and reported here. The sound energy was more diffuse in frequency domain for the broadband clicks than typical narrowband ones, extending to below 50 kHz and above 180 kHz. During the recordings, the reverberations influenced the signals, shown in both time and frequency domains. The reverberations could disperse the energy of the original narrowband and broadband clicks into several peak frequency ranges. For the signals used by porpoise for echolocation, the noise caused by man-made activities could influence the marine mammal negatively. The researches into porpoise's signals could provide references to protect the animal. 2017 Journal Article http://hdl.handle.net/20.500.11937/76253 10.1166/jbmb.2017.1642 English AMER SCIENTIFIC PUBLISHERS restricted |
| spellingShingle | Science & Technology Physical Sciences Technology Chemistry, Applied Energy & Fuels Materials Science, Biomaterials Chemistry Materials Science Finless Porpoise Vocalization Broadband Click Peak Frequency BAIJI LIPOTES-VEXILLIFER ECHOLOCATION SIGNALS ACETYLCHOLINESTERASE BIOSENSOR PHOCAENOIDES PROPAGATION DOLPHINS SOUND BEAM TRANSMISSION Song, Zhongchang Zhang, Yu Wang, Xianyan Wei, Chong Wu, Fuxing Miao, Xing Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China |
| title | Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China |
| title_full | Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China |
| title_fullStr | Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China |
| title_full_unstemmed | Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China |
| title_short | Vocalizations of a Wild Finless Porpoise (Neophocaena asiaeorientalis sunmeri) in the Western Coast of the Taiwan Strait, China |
| title_sort | vocalizations of a wild finless porpoise (neophocaena asiaeorientalis sunmeri) in the western coast of the taiwan strait, china |
| topic | Science & Technology Physical Sciences Technology Chemistry, Applied Energy & Fuels Materials Science, Biomaterials Chemistry Materials Science Finless Porpoise Vocalization Broadband Click Peak Frequency BAIJI LIPOTES-VEXILLIFER ECHOLOCATION SIGNALS ACETYLCHOLINESTERASE BIOSENSOR PHOCAENOIDES PROPAGATION DOLPHINS SOUND BEAM TRANSMISSION |
| url | http://hdl.handle.net/20.500.11937/76253 |