The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected Areas
Marine Protected Areas (MPAs) in Brazil, like the “Refúgio de Vida Silvestre do Arquipélago de Alcatrazes”(REVIS de Alcatrazes), contain great species diversity. For conservation purposes, investing in local monitoring and surveillance is necessary. In this sense, Passive Acoustic Monitoring (PAM)...
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| Format: | Article |
| Language: | English |
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Instituto Oceanográfico da Universidade de São Paulo
2024-12-01
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| Series: | Ocean and Coastal Research |
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| Online Access: | https://www.revistas.usp.br/ocr/article/view/232344 |
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| author | Ana Clara B. Mariani Silvia N. Godoy Marcos César de O. Santos |
| author_facet | Ana Clara B. Mariani Silvia N. Godoy Marcos César de O. Santos |
| author_sort | Ana Clara B. Mariani |
| collection | DOAJ |
| description |
Marine Protected Areas (MPAs) in Brazil, like the “Refúgio de Vida Silvestre do Arquipélago de
Alcatrazes”(REVIS de Alcatrazes), contain great species diversity. For conservation purposes, investing
in local monitoring and surveillance is necessary. In this sense, Passive Acoustic Monitoring (PAM)
has been used to collect acoustic data from marine environments. Therefore, this study assessed
the frequency of vessels in the mentioned MPA in 2019 using PAM. Audio records collected by a
hydrophone anchored at Saco do Funil (24°05’S; 45°41’O), located around 500 m from the main island of
the archipelago, were used. Each audio file underwent a visual inspection of the spectrograms to detect
the acoustic signals. The noise related to vessels transit was identified in 10% of the analyzed files,
of which approximately 46% of the occurrences did not correspond to visits by the MPA management
office. The area was most frequented from 6 am to 2 pm. The occurrence of non-official and unauthorized
vessels was mostly concentrated from 3 am to 6 am and at 0 am. The study also underscored the
biological significance of the MPA, revealing this area potential to be regularly visited by baleen whales
in July and toothed whales throughout the analyzed months. So far, this is the only known surveillance
investigation that used the PAM in MPAs along the Brazilian coast. Improvement and expansion of
this technique use may lead using acoustics as an important auxiliary tool in monitoring MPAs on
the Brazilian coast.
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| format | Article |
| id | doaj-art-198da11cb15e405da1ef618ef47a6cfa |
| institution | DOAJ |
| issn | 2675-2824 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Instituto Oceanográfico da Universidade de São Paulo |
| record_format | Article |
| series | Ocean and Coastal Research |
| spelling | doaj-art-198da11cb15e405da1ef618ef47a6cfa2025-08-20T03:14:21ZengInstituto Oceanográfico da Universidade de São PauloOcean and Coastal Research2675-28242024-12-017210.1590/2675-2824072.24033The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected AreasAna Clara B. MarianiSilvia N. GodoyMarcos César de O. Santos Marine Protected Areas (MPAs) in Brazil, like the “Refúgio de Vida Silvestre do Arquipélago de Alcatrazes”(REVIS de Alcatrazes), contain great species diversity. For conservation purposes, investing in local monitoring and surveillance is necessary. In this sense, Passive Acoustic Monitoring (PAM) has been used to collect acoustic data from marine environments. Therefore, this study assessed the frequency of vessels in the mentioned MPA in 2019 using PAM. Audio records collected by a hydrophone anchored at Saco do Funil (24°05’S; 45°41’O), located around 500 m from the main island of the archipelago, were used. Each audio file underwent a visual inspection of the spectrograms to detect the acoustic signals. The noise related to vessels transit was identified in 10% of the analyzed files, of which approximately 46% of the occurrences did not correspond to visits by the MPA management office. The area was most frequented from 6 am to 2 pm. The occurrence of non-official and unauthorized vessels was mostly concentrated from 3 am to 6 am and at 0 am. The study also underscored the biological significance of the MPA, revealing this area potential to be regularly visited by baleen whales in July and toothed whales throughout the analyzed months. So far, this is the only known surveillance investigation that used the PAM in MPAs along the Brazilian coast. Improvement and expansion of this technique use may lead using acoustics as an important auxiliary tool in monitoring MPAs on the Brazilian coast. https://www.revistas.usp.br/ocr/article/view/232344Acoustic signals classificationOccurrence of boatsOccurrence of cetaceansMonitoring and surveillance efforts, Biodiversity conservation |
| spellingShingle | Ana Clara B. Mariani Silvia N. Godoy Marcos César de O. Santos The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected Areas Ocean and Coastal Research Acoustic signals classification Occurrence of boats Occurrence of cetaceans Monitoring and surveillance efforts , Biodiversity conservation |
| title | The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected Areas |
| title_full | The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected Areas |
| title_fullStr | The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected Areas |
| title_full_unstemmed | The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected Areas |
| title_short | The use of Passive Acoustic Monitoring as an auxiliary tool for monitoring Marine Protected Areas |
| title_sort | use of passive acoustic monitoring as an auxiliary tool for monitoring marine protected areas |
| topic | Acoustic signals classification Occurrence of boats Occurrence of cetaceans Monitoring and surveillance efforts , Biodiversity conservation |
| url | https://www.revistas.usp.br/ocr/article/view/232344 |
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