Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins
Recent years have seen a notable rise in dolphin-watching boat activities along the Algarve coast in Portugal, potentially affecting the common dolphin (<i>Delphinus delphis</i>) and bottlenose dolphin (<i>Tursiops truncatus</i>) local populations. This study examines the imp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-10-01
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| Series: | Oceans |
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| Online Access: | https://www.mdpi.com/2673-1924/5/4/44 |
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| author | Ana A. Silva Joana Castro André Cid Sérgio M. Jesus Fábio L. Matos |
| author_facet | Ana A. Silva Joana Castro André Cid Sérgio M. Jesus Fábio L. Matos |
| author_sort | Ana A. Silva |
| collection | DOAJ |
| description | Recent years have seen a notable rise in dolphin-watching boat activities along the Algarve coast in Portugal, potentially affecting the common dolphin (<i>Delphinus delphis</i>) and bottlenose dolphin (<i>Tursiops truncatus</i>) local populations. This study examines the impact of increasing underwater noise levels from these boats on dolphin vocalizations. Field recordings were conducted from June to September 2022, analyzing dolphin whistles in various boat presence scenarios. The results indicate significant changes in whistle-frequency characteristics with boat presence, including increased start, low, and high frequencies, alongside a decrease in the number of inflection points in modulated whistles. The changes might negatively impact dolphin populations viability, underscoring the need for further research. Additionally, improved mitigation strategies may be necessary to reduce the potential negative effects of dolphin watching on cetacean communication and behavior in the Algarve region. |
| format | Article |
| id | doaj-art-ff038005c5214089a9d8f879107a2ea4 |
| institution | DOAJ |
| issn | 2673-1924 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Oceans |
| spelling | doaj-art-ff038005c5214089a9d8f879107a2ea42025-08-20T02:43:53ZengMDPI AGOceans2673-19242024-10-015477078410.3390/oceans5040044Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose DolphinsAna A. Silva0Joana Castro1André Cid2Sérgio M. Jesus3Fábio L. Matos4Faculty of Sciences and Technology (FCT), University of Algarve, 8005-139 Faro, PortugalAIMM—Associação para Investigação do Meio Marinho, Rua Maestro Frederico de Freitas N15-1°, 1500-399 Lisboa, PortugalAIMM—Associação para Investigação do Meio Marinho, Rua Maestro Frederico de Freitas N15-1°, 1500-399 Lisboa, PortugalLaboratory of Robotics and Engineering Systems (LARSyS), University of Algarve, 8005-139 Faro, PortugalAIMM—Associação para Investigação do Meio Marinho, Rua Maestro Frederico de Freitas N15-1°, 1500-399 Lisboa, PortugalRecent years have seen a notable rise in dolphin-watching boat activities along the Algarve coast in Portugal, potentially affecting the common dolphin (<i>Delphinus delphis</i>) and bottlenose dolphin (<i>Tursiops truncatus</i>) local populations. This study examines the impact of increasing underwater noise levels from these boats on dolphin vocalizations. Field recordings were conducted from June to September 2022, analyzing dolphin whistles in various boat presence scenarios. The results indicate significant changes in whistle-frequency characteristics with boat presence, including increased start, low, and high frequencies, alongside a decrease in the number of inflection points in modulated whistles. The changes might negatively impact dolphin populations viability, underscoring the need for further research. Additionally, improved mitigation strategies may be necessary to reduce the potential negative effects of dolphin watching on cetacean communication and behavior in the Algarve region.https://www.mdpi.com/2673-1924/5/4/44acoustic behavioracoustic parameters<i>Delphinus delphis</i><i>Tursiops truncatus</i>underwater boat noisevocal signals |
| spellingShingle | Ana A. Silva Joana Castro André Cid Sérgio M. Jesus Fábio L. Matos Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins Oceans acoustic behavior acoustic parameters <i>Delphinus delphis</i> <i>Tursiops truncatus</i> underwater boat noise vocal signals |
| title | Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins |
| title_full | Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins |
| title_fullStr | Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins |
| title_full_unstemmed | Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins |
| title_short | Influence of Dolphin-Watching Tourism Vessels on the Whistle Emission Pattern of Common Dolphins and Bottlenose Dolphins |
| title_sort | influence of dolphin watching tourism vessels on the whistle emission pattern of common dolphins and bottlenose dolphins |
| topic | acoustic behavior acoustic parameters <i>Delphinus delphis</i> <i>Tursiops truncatus</i> underwater boat noise vocal signals |
| url | https://www.mdpi.com/2673-1924/5/4/44 |
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