Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions
Anthropogenic sound in the marine environment can have negative consequences for marine fauna. Since most sound sources are intermittent or continuous, estimating how many individuals are exposed over time remains challenging, as this depends on the animals' mobility. Here we explored how anima...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
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Inter-Research
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/38409 |
| _version_ | 1848755313160749056 |
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| author | Aarts, G. Von Benda-Beckmann, A. Lucke, Klaus Sertlek, H. Van Bemmelen, R. Geelhoed, S. Brasseur, S. Scheidat, M. Lam, F. Slabbekoorn, H. Kirkwood, R. |
| author_facet | Aarts, G. Von Benda-Beckmann, A. Lucke, Klaus Sertlek, H. Van Bemmelen, R. Geelhoed, S. Brasseur, S. Scheidat, M. Lam, F. Slabbekoorn, H. Kirkwood, R. |
| author_sort | Aarts, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Anthropogenic sound in the marine environment can have negative consequences for marine fauna. Since most sound sources are intermittent or continuous, estimating how many individuals are exposed over time remains challenging, as this depends on the animals' mobility. Here we explored how animal movement influences how many, and how often, animals are impacted by sound. In a dedicated study, we estimated how different movement strategies affect the number of individual harbour porpoises Phocoena phocoena receiving temporary or permanent hearing loss due to underwater detonations of recovered explosives (mostly WWII aerial bombs). Geo-statistical distribution models were fitted to data from 4 marine mammal aerial surveys and used to simulate the distribution and movement of porpoises. Based on derived dose-response thresholds for temporary (TTS) or permanent threshold shifts (PTS), we estimated the number of animals affected in a single year. When individuals were free-roaming, an estimated 1200 and 24 000 unique individuals would suffer PTS and TTS, respectively. This equates to respectively 0.50 and 10% of the estimated North Sea population. In contrast, when porpoises remained in a local area, fewer animals would receive PTS and TTS (1100 [0.47%] and 15 000 [6.5%], respectively), but more individuals would be subjected to repeated exposures. Because most anthropogenic sound-producing activities operate continuously or intermittently, snapshot distribution estimates alone tend to underestimate the number of individuals exposed, particularly for mobile species. Hence, an understanding of animal movement is needed to estimate the impact of underwater sound or other human disturbance. © The authors 2016. |
| first_indexed | 2025-11-14T08:54:19Z |
| format | Journal Article |
| id | curtin-20.500.11937-38409 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:54:19Z |
| publishDate | 2016 |
| publisher | Inter-Research |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-384092020-12-03T03:52:46Z Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions Aarts, G. Von Benda-Beckmann, A. Lucke, Klaus Sertlek, H. Van Bemmelen, R. Geelhoed, S. Brasseur, S. Scheidat, M. Lam, F. Slabbekoorn, H. Kirkwood, R. Anthropogenic sound in the marine environment can have negative consequences for marine fauna. Since most sound sources are intermittent or continuous, estimating how many individuals are exposed over time remains challenging, as this depends on the animals' mobility. Here we explored how animal movement influences how many, and how often, animals are impacted by sound. In a dedicated study, we estimated how different movement strategies affect the number of individual harbour porpoises Phocoena phocoena receiving temporary or permanent hearing loss due to underwater detonations of recovered explosives (mostly WWII aerial bombs). Geo-statistical distribution models were fitted to data from 4 marine mammal aerial surveys and used to simulate the distribution and movement of porpoises. Based on derived dose-response thresholds for temporary (TTS) or permanent threshold shifts (PTS), we estimated the number of animals affected in a single year. When individuals were free-roaming, an estimated 1200 and 24 000 unique individuals would suffer PTS and TTS, respectively. This equates to respectively 0.50 and 10% of the estimated North Sea population. In contrast, when porpoises remained in a local area, fewer animals would receive PTS and TTS (1100 [0.47%] and 15 000 [6.5%], respectively), but more individuals would be subjected to repeated exposures. Because most anthropogenic sound-producing activities operate continuously or intermittently, snapshot distribution estimates alone tend to underestimate the number of individuals exposed, particularly for mobile species. Hence, an understanding of animal movement is needed to estimate the impact of underwater sound or other human disturbance. © The authors 2016. 2016 Journal Article http://hdl.handle.net/20.500.11937/38409 10.3354/meps11829 http://creativecommons.org/licenses/by/4.0/ Inter-Research fulltext |
| spellingShingle | Aarts, G. Von Benda-Beckmann, A. Lucke, Klaus Sertlek, H. Van Bemmelen, R. Geelhoed, S. Brasseur, S. Scheidat, M. Lam, F. Slabbekoorn, H. Kirkwood, R. Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions |
| title | Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions |
| title_full | Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions |
| title_fullStr | Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions |
| title_full_unstemmed | Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions |
| title_short | Harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions |
| title_sort | harbour porpoise movement strategy affects cumulative number of animals acoustically exposed to underwater explosions |
| url | http://hdl.handle.net/20.500.11937/38409 |