Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel
In the presence of vessels, dolphins have been found to change their habitat, behavior, group composition and whistle repertoire. The modification of the whistle parameters is generally considered to be a response to the engine noise. Little is known about the impact of the physical presence of vess...
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| Format: | Article |
| Language: | English |
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PeerJ Inc.
2022-10-01
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| Series: | PeerJ |
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| Online Access: | https://peerj.com/articles/14074.pdf |
| _version_ | 1797425589885337600 |
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| author | Simone Antichi Jorge Urbán R. Sergio Martínez-Aguilar Lorena Viloria-Gómora |
| author_facet | Simone Antichi Jorge Urbán R. Sergio Martínez-Aguilar Lorena Viloria-Gómora |
| author_sort | Simone Antichi |
| collection | DOAJ |
| description | In the presence of vessels, dolphins have been found to change their habitat, behavior, group composition and whistle repertoire. The modification of the whistle parameters is generally considered to be a response to the engine noise. Little is known about the impact of the physical presence of vessels on dolphin acoustics. Whistle parameters of the coastal and oceanic ecotypes of common bottlenose dolphins in La Paz Bay, Mexico, were measured after the approach of the research vessel and its engine shutdown. Recordings of 10 min were made immediately after turning off the engine. For analysis, these recordings were divided from minute 0 to minute 5, and from minute 5:01 to minute 10. The whistles of the oceanic ecotype showed higher maximum, minimum and peak frequency in the second time interval compared to the first one. The whistle rate decreased in the second time interval. The whistles of the coastal ecotype showed no difference between the two time intervals. The physical presence of the research vessel could have induced a change in the whistle parameters of the oceanic dolphins until habituation to the vessel disturbance. The oceanic ecotype could increase the whistle rate and decrease the whistle frequencies to maintain acoustic contact more frequently and for longer distances. The coastal ecotype, showing no significant changes in the whistle parameters, could be more habituated to the presence of vessels and display a higher tolerance. |
| first_indexed | 2024-03-09T08:18:16Z |
| format | Article |
| id | doaj.art-186d2c84b04a432e947bf03db871d69d |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T08:18:16Z |
| publishDate | 2022-10-01 |
| publisher | PeerJ Inc. |
| record_format | Article |
| series | PeerJ |
| spelling | doaj.art-186d2c84b04a432e947bf03db871d69d2023-12-02T21:55:05ZengPeerJ Inc.PeerJ2167-83592022-10-0110e1407410.7717/peerj.14074Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vesselSimone Antichi0Jorge Urbán R.1Sergio Martínez-Aguilar2Lorena Viloria-Gómora3Departamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, La Paz, Baja California Sur, MexicoDepartamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, La Paz, Baja California Sur, MexicoDepartamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, La Paz, Baja California Sur, MexicoDepartamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, La Paz, Baja California Sur, MexicoIn the presence of vessels, dolphins have been found to change their habitat, behavior, group composition and whistle repertoire. The modification of the whistle parameters is generally considered to be a response to the engine noise. Little is known about the impact of the physical presence of vessels on dolphin acoustics. Whistle parameters of the coastal and oceanic ecotypes of common bottlenose dolphins in La Paz Bay, Mexico, were measured after the approach of the research vessel and its engine shutdown. Recordings of 10 min were made immediately after turning off the engine. For analysis, these recordings were divided from minute 0 to minute 5, and from minute 5:01 to minute 10. The whistles of the oceanic ecotype showed higher maximum, minimum and peak frequency in the second time interval compared to the first one. The whistle rate decreased in the second time interval. The whistles of the coastal ecotype showed no difference between the two time intervals. The physical presence of the research vessel could have induced a change in the whistle parameters of the oceanic dolphins until habituation to the vessel disturbance. The oceanic ecotype could increase the whistle rate and decrease the whistle frequencies to maintain acoustic contact more frequently and for longer distances. The coastal ecotype, showing no significant changes in the whistle parameters, could be more habituated to the presence of vessels and display a higher tolerance.https://peerj.com/articles/14074.pdfTursiops truncatusGulf of CaliforniaVocalizationDisturbanceHuman impactCetaceans |
| spellingShingle | Simone Antichi Jorge Urbán R. Sergio Martínez-Aguilar Lorena Viloria-Gómora Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel PeerJ Tursiops truncatus Gulf of California Vocalization Disturbance Human impact Cetaceans |
| title | Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel |
| title_full | Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel |
| title_fullStr | Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel |
| title_full_unstemmed | Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel |
| title_short | Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel |
| title_sort | changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel |
| topic | Tursiops truncatus Gulf of California Vocalization Disturbance Human impact Cetaceans |
| url | https://peerj.com/articles/14074.pdf |
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