Vessel noise exposures of harbour seals from the Wadden Sea
Abstract The North Sea faces intense ship traffic owing to increasing human activities at sea. As harbour seals (Phoca vitulina) are abundant top predators in the North Sea, it is hypothesised that they experience repeated, high-amplitude vessel exposures. Here, we test this hypothesis by quantifyin...
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Online Access: | https://doi.org/10.1038/s41598-023-33283-z https://doaj.org/article/4d7355683f7c461b94c8dd2670809e91 |
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ftdoajarticles:oai:doaj.org/article:4d7355683f7c461b94c8dd2670809e91 2023-06-11T04:16:00+02:00 Vessel noise exposures of harbour seals from the Wadden Sea Dominik André Nachtsheim Mark Johnson Tobias Schaffeld Abbo van Neer Peter T. Madsen Charlotte R. Findlay Laia Rojano-Doñate Jonas Teilmann Lonnie Mikkelsen Johannes Baltzer Andreas Ruser Ursula Siebert Joseph G. Schnitzler 2023-04-01T00:00:00Z https://doi.org/10.1038/s41598-023-33283-z https://doaj.org/article/4d7355683f7c461b94c8dd2670809e91 EN eng Nature Portfolio https://doi.org/10.1038/s41598-023-33283-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-33283-z 2045-2322 https://doaj.org/article/4d7355683f7c461b94c8dd2670809e91 Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023) Medicine R Science Q article 2023 ftdoajarticles https://doi.org/10.1038/s41598-023-33283-z 2023-04-23T00:36:41Z Abstract The North Sea faces intense ship traffic owing to increasing human activities at sea. As harbour seals (Phoca vitulina) are abundant top predators in the North Sea, it is hypothesised that they experience repeated, high-amplitude vessel exposures. Here, we test this hypothesis by quantifying vessel noise exposures from deployments of long-term sound and movement tags (DTAGs) on nine harbour seals from the Wadden Sea. An automated tool was developed to detect intervals of elevated noise in the sound recordings. An assessment by multiple raters was performed to classify the source as either vessels or other sounds. A total of 133 vessel passes were identified with received levels > 97 dB re 1µPa RMS in the 2 kHz decidecade band and with ambient noise > 6 dB below this detection threshold. Tagged seals spent most of their time within Marine Protected Areas (89 ± 13%, mean ± SD) and were exposed to high-amplitude vessel passes 4.3 ± 1.6 times per day. Only 32% of vessel passes were plausibly associated with an AIS-registered vessel. We conclude that seals in industrialized waters are exposed repeatedly to vessel noise, even in areas designated as protected, and that exposures are poorly predicted by AIS data. Article in Journal/Newspaper Phoca vitulina Directory of Open Access Journals: DOAJ Articles Scientific Reports 13 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Dominik André Nachtsheim Mark Johnson Tobias Schaffeld Abbo van Neer Peter T. Madsen Charlotte R. Findlay Laia Rojano-Doñate Jonas Teilmann Lonnie Mikkelsen Johannes Baltzer Andreas Ruser Ursula Siebert Joseph G. Schnitzler Vessel noise exposures of harbour seals from the Wadden Sea |
topic_facet |
Medicine R Science Q |
description |
Abstract The North Sea faces intense ship traffic owing to increasing human activities at sea. As harbour seals (Phoca vitulina) are abundant top predators in the North Sea, it is hypothesised that they experience repeated, high-amplitude vessel exposures. Here, we test this hypothesis by quantifying vessel noise exposures from deployments of long-term sound and movement tags (DTAGs) on nine harbour seals from the Wadden Sea. An automated tool was developed to detect intervals of elevated noise in the sound recordings. An assessment by multiple raters was performed to classify the source as either vessels or other sounds. A total of 133 vessel passes were identified with received levels > 97 dB re 1µPa RMS in the 2 kHz decidecade band and with ambient noise > 6 dB below this detection threshold. Tagged seals spent most of their time within Marine Protected Areas (89 ± 13%, mean ± SD) and were exposed to high-amplitude vessel passes 4.3 ± 1.6 times per day. Only 32% of vessel passes were plausibly associated with an AIS-registered vessel. We conclude that seals in industrialized waters are exposed repeatedly to vessel noise, even in areas designated as protected, and that exposures are poorly predicted by AIS data. |
format |
Article in Journal/Newspaper |
author |
Dominik André Nachtsheim Mark Johnson Tobias Schaffeld Abbo van Neer Peter T. Madsen Charlotte R. Findlay Laia Rojano-Doñate Jonas Teilmann Lonnie Mikkelsen Johannes Baltzer Andreas Ruser Ursula Siebert Joseph G. Schnitzler |
author_facet |
Dominik André Nachtsheim Mark Johnson Tobias Schaffeld Abbo van Neer Peter T. Madsen Charlotte R. Findlay Laia Rojano-Doñate Jonas Teilmann Lonnie Mikkelsen Johannes Baltzer Andreas Ruser Ursula Siebert Joseph G. Schnitzler |
author_sort |
Dominik André Nachtsheim |
title |
Vessel noise exposures of harbour seals from the Wadden Sea |
title_short |
Vessel noise exposures of harbour seals from the Wadden Sea |
title_full |
Vessel noise exposures of harbour seals from the Wadden Sea |
title_fullStr |
Vessel noise exposures of harbour seals from the Wadden Sea |
title_full_unstemmed |
Vessel noise exposures of harbour seals from the Wadden Sea |
title_sort |
vessel noise exposures of harbour seals from the wadden sea |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41598-023-33283-z https://doaj.org/article/4d7355683f7c461b94c8dd2670809e91 |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023) |
op_relation |
https://doi.org/10.1038/s41598-023-33283-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-33283-z 2045-2322 https://doaj.org/article/4d7355683f7c461b94c8dd2670809e91 |
op_doi |
https://doi.org/10.1038/s41598-023-33283-z |
container_title |
Scientific Reports |
container_volume |
13 |
container_issue |
1 |
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1768373329961418752 |