Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior:
Acoustic mitigation devices (AMDs) are used to deter marine mammals from construction sites to prevent hearing injury by offshore pile-driving noise. In order to quantify the distance at which AMDs designed as ‘seal scarers’ are detected by seals, the 50% hearing thresholds for playbacks of their so...
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fttno:oai:tudelft.nl:uuid:88a90b8d-675b-4e86-8c9d-74286813254b 2023-05-15T17:58:56+02:00 Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: Kastelein, R.A. Helder-Hoek, L. Gransier, R. Terhune, J.M. Jennings, N. Jong, C.A.F. de 2015-01-01 http://resolver.tudelft.nl/uuid:88a90b8d-675b-4e86-8c9d-74286813254b en eng uuid:88a90b8d-675b-4e86-8c9d-74286813254b 520933 http://resolver.tudelft.nl/uuid:88a90b8d-675b-4e86-8c9d-74286813254b Hydrobiologia, 1, 756, 75-88 Biology Marine mammals Acoustics Behavior Pile driving Pinniped Seal scarer Offshore wind park High Tech Maritime and Offshore Systems Industrial Innovation Physics & Electronics AS - Acoustics & Sonar TS - Technical Sciences article 2015 fttno 2022-04-10T15:54:14Z Acoustic mitigation devices (AMDs) are used to deter marine mammals from construction sites to prevent hearing injury by offshore pile-driving noise. In order to quantify the distance at which AMDs designed as ‘seal scarers’ are detected by seals, the 50% hearing thresholds for playbacks of their sounds were determined. The broadband hearing threshold sound pressure levels (SPLs) of two harbor seals for signals from two AMDs were similar (63–69 dB re 1 lPa, rms). Effects of the AMDs on the seals’ behavior were quantified at three SPLs: one which just did not cause behavioral changes, one which caused one of the seals to haul out occasionally, and one which caused one of the seals to haul out more than 10% of the time. The corresponding mean received SPLs were, respectively, Ace Aquatec: 109, 124, and 134 dB re 1 lPa, rms; Lofitech: 128, 133, and 138 dB re 1 lPa, rms. Thus at similar received levels, the Ace Aquatec seems more effective than the Lofitech in deterring harbor seals. Detection and behavioral response distances of the AMD sounds for harbor seals at sea can be estimated by combining the results from the present study with data on AMD source levels, propagation conditions, and background noise levels near construction sites Article in Journal/Newspaper Phoca vitulina TU Delft: Institutional Repository (Delft University of Technology) |
institution |
Open Polar |
collection |
TU Delft: Institutional Repository (Delft University of Technology) |
op_collection_id |
fttno |
language |
English |
topic |
Biology Marine mammals Acoustics Behavior Pile driving Pinniped Seal scarer Offshore wind park High Tech Maritime and Offshore Systems Industrial Innovation Physics & Electronics AS - Acoustics & Sonar TS - Technical Sciences |
spellingShingle |
Biology Marine mammals Acoustics Behavior Pile driving Pinniped Seal scarer Offshore wind park High Tech Maritime and Offshore Systems Industrial Innovation Physics & Electronics AS - Acoustics & Sonar TS - Technical Sciences Kastelein, R.A. Helder-Hoek, L. Gransier, R. Terhune, J.M. Jennings, N. Jong, C.A.F. de Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: |
topic_facet |
Biology Marine mammals Acoustics Behavior Pile driving Pinniped Seal scarer Offshore wind park High Tech Maritime and Offshore Systems Industrial Innovation Physics & Electronics AS - Acoustics & Sonar TS - Technical Sciences |
description |
Acoustic mitigation devices (AMDs) are used to deter marine mammals from construction sites to prevent hearing injury by offshore pile-driving noise. In order to quantify the distance at which AMDs designed as ‘seal scarers’ are detected by seals, the 50% hearing thresholds for playbacks of their sounds were determined. The broadband hearing threshold sound pressure levels (SPLs) of two harbor seals for signals from two AMDs were similar (63–69 dB re 1 lPa, rms). Effects of the AMDs on the seals’ behavior were quantified at three SPLs: one which just did not cause behavioral changes, one which caused one of the seals to haul out occasionally, and one which caused one of the seals to haul out more than 10% of the time. The corresponding mean received SPLs were, respectively, Ace Aquatec: 109, 124, and 134 dB re 1 lPa, rms; Lofitech: 128, 133, and 138 dB re 1 lPa, rms. Thus at similar received levels, the Ace Aquatec seems more effective than the Lofitech in deterring harbor seals. Detection and behavioral response distances of the AMD sounds for harbor seals at sea can be estimated by combining the results from the present study with data on AMD source levels, propagation conditions, and background noise levels near construction sites |
format |
Article in Journal/Newspaper |
author |
Kastelein, R.A. Helder-Hoek, L. Gransier, R. Terhune, J.M. Jennings, N. Jong, C.A.F. de |
author_facet |
Kastelein, R.A. Helder-Hoek, L. Gransier, R. Terhune, J.M. Jennings, N. Jong, C.A.F. de |
author_sort |
Kastelein, R.A. |
title |
Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: |
title_short |
Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: |
title_full |
Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: |
title_fullStr |
Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: |
title_full_unstemmed |
Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: |
title_sort |
hearing thresholds of harbor seals (phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior: |
publishDate |
2015 |
url |
http://resolver.tudelft.nl/uuid:88a90b8d-675b-4e86-8c9d-74286813254b |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
Hydrobiologia, 1, 756, 75-88 |
op_relation |
uuid:88a90b8d-675b-4e86-8c9d-74286813254b 520933 http://resolver.tudelft.nl/uuid:88a90b8d-675b-4e86-8c9d-74286813254b |
_version_ |
1766167669416919040 |