Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, Mexico
Vessel traffic is one of the major sources of underwater anthropogenic noise. Dolphins can modify their vocal repertoire, especially whistles, in presence of vessels to facilitate their communication. Acoustic data were collected (sampling rate 96 kHz) in La Paz Bay, Gulf of California, Mexico. Whis...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Diversity |
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| Online Access: | https://www.mdpi.com/1424-2818/14/9/712 |
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| author | Simone Antichi Armando M. Jaramillo-Legorreta Jorge Urbán R. Sergio Martínez-Aguilar Lorena Viloria-Gómora |
| author_facet | Simone Antichi Armando M. Jaramillo-Legorreta Jorge Urbán R. Sergio Martínez-Aguilar Lorena Viloria-Gómora |
| author_sort | Simone Antichi |
| collection | DOAJ |
| description | Vessel traffic is one of the major sources of underwater anthropogenic noise. Dolphins can modify their vocal repertoire, especially whistles, in presence of vessels to facilitate their communication. Acoustic data were collected (sampling rate 96 kHz) in La Paz Bay, Gulf of California, Mexico. Whistle rate and parameters of the coastal and oceanic ecotypes of common bottlenose dolphins (<i>Tursiops truncatus</i>) were measured in absence of vessels and in presence of moving small vessels (size 5–10 m). The peak noise difference was calculated between the two frequency bands dominated by the whistles (2000–20,000 Hz) and the small vessel (500–2000 Hz). In presence of vessels the oceanic ecotype decreased whistle frequencies while the coastal ecotype increased them. Both ecotypes raised whistle frequencies with the decreasing of the peak noise difference. The differences in habitat and group structure could have driven the two ecotypes to react in a different way to the vessel presence. |
| first_indexed | 2024-03-10T00:14:53Z |
| format | Article |
| id | doaj.art-424c96ceca7a4939ab8fddce863fcf0b |
| institution | Directory Open Access Journal |
| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-10T00:14:53Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diversity |
| spelling | doaj.art-424c96ceca7a4939ab8fddce863fcf0b2023-11-23T15:52:19ZengMDPI AGDiversity1424-28182022-08-0114971210.3390/d14090712Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, MexicoSimone Antichi0Armando M. Jaramillo-Legorreta1Jorge Urbán R.2Sergio Martínez-Aguilar3Lorena Viloria-Gómora4Departamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, Sur KM 5.5, La Paz CP 23080, Baja California Sur, MexicoComisión Nacional de Áreas Naturales Protegidas, Dirección Regional Península de Baja California y Pacífico Norte, SEMARNAT. Carr. Ens-Tij. 3911. Zona Playitas. Camper #10, Ensenada CP 22860, Baja California, MexicoDepartamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, Sur KM 5.5, La Paz CP 23080, Baja California Sur, MexicoDepartamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, Sur KM 5.5, La Paz CP 23080, Baja California Sur, MexicoDepartamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, Sur KM 5.5, La Paz CP 23080, Baja California Sur, MexicoVessel traffic is one of the major sources of underwater anthropogenic noise. Dolphins can modify their vocal repertoire, especially whistles, in presence of vessels to facilitate their communication. Acoustic data were collected (sampling rate 96 kHz) in La Paz Bay, Gulf of California, Mexico. Whistle rate and parameters of the coastal and oceanic ecotypes of common bottlenose dolphins (<i>Tursiops truncatus</i>) were measured in absence of vessels and in presence of moving small vessels (size 5–10 m). The peak noise difference was calculated between the two frequency bands dominated by the whistles (2000–20,000 Hz) and the small vessel (500–2000 Hz). In presence of vessels the oceanic ecotype decreased whistle frequencies while the coastal ecotype increased them. Both ecotypes raised whistle frequencies with the decreasing of the peak noise difference. The differences in habitat and group structure could have driven the two ecotypes to react in a different way to the vessel presence.https://www.mdpi.com/1424-2818/14/9/712anthropogenic noisecetaceansvocalizationsdisturbanceGulf of Californiamarine conservation |
| spellingShingle | Simone Antichi Armando M. Jaramillo-Legorreta Jorge Urbán R. Sergio Martínez-Aguilar Lorena Viloria-Gómora Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, Mexico Diversity anthropogenic noise cetaceans vocalizations disturbance Gulf of California marine conservation |
| title | Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, Mexico |
| title_full | Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, Mexico |
| title_fullStr | Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, Mexico |
| title_full_unstemmed | Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, Mexico |
| title_short | Small Vessel Impact on the Whistle Parameters of Two Ecotypes of Common Bottlenose Dolphin (<i>Tursiops truncatus</i>) in La Paz Bay, Mexico |
| title_sort | small vessel impact on the whistle parameters of two ecotypes of common bottlenose dolphin i tursiops truncatus i in la paz bay mexico |
| topic | anthropogenic noise cetaceans vocalizations disturbance Gulf of California marine conservation |
| url | https://www.mdpi.com/1424-2818/14/9/712 |
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