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Response of Eurasian otters (Lutra lutra) to underwater acoustic harassment device sounds
Seal scarers (or acoustic harassment devices, AHDs) are designed to deter seals from fishing gear and aquaculture operations, as well as to prevent seals from entering rivers to avoid predation on valuable fish. Our study investigated the potential effects of AHDs on non-target species, specifically...
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Published in: | Scientific reports 2024-02, Vol.14 (1), p.4988-4988, Article 4988 |
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description | Seal scarers (or acoustic harassment devices, AHDs) are designed to deter seals from fishing gear and aquaculture operations, as well as to prevent seals from entering rivers to avoid predation on valuable fish. Our study investigated the potential effects of AHDs on non-target species, specifically the Eurasian otters (
Lutra lutra
), by testing the reaction of two rehabilitated otters to simulated AHDs sounds at 1 and 14 kHz, with a received sound intensity of 105–145 dB re 1 µPa rms. The 1 kHz sounds were used to investigate alternative frequencies for scaring seals without scaring otters. The otters reacted to both 1 and 14 kHz tonal signals when retrieving fish from a feeding station 0.8 m below the surface. Their diving behaviour and time to extract food progressively increased as sound intensity increased for all tested sound levels. Notably, the sound levels used in our tests were significantly lower (40–80 dB) than the source levels from commercial AHDs. These findings highlight the importance of caution when using AHDs in river and sea habitats inhabited by otters, as AHDs can change their behaviour and potentially result in habitat exclusion. |
doi_str_mv | 10.1038/s41598-024-55481-z |
format | article |
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Lutra lutra
), by testing the reaction of two rehabilitated otters to simulated AHDs sounds at 1 and 14 kHz, with a received sound intensity of 105–145 dB re 1 µPa rms. The 1 kHz sounds were used to investigate alternative frequencies for scaring seals without scaring otters. The otters reacted to both 1 and 14 kHz tonal signals when retrieving fish from a feeding station 0.8 m below the surface. Their diving behaviour and time to extract food progressively increased as sound intensity increased for all tested sound levels. Notably, the sound levels used in our tests were significantly lower (40–80 dB) than the source levels from commercial AHDs. These findings highlight the importance of caution when using AHDs in river and sea habitats inhabited by otters, as AHDs can change their behaviour and potentially result in habitat exclusion.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/s41598-024-55481-z</identifier><identifier>PMID: 38424202</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>631/158 ; 631/158/2039 ; 631/158/2459 ; 631/158/670 ; 631/158/672 ; 631/158/843 ; 631/158/856 ; 631/1647 ; 631/1647/2198 ; 631/1647/334 ; 631/378 ; 631/378/1488 ; 631/378/1595 ; 631/378/1831 ; 631/378/2619 ; 631/601 ; 631/601/18 ; 704/158 ; 704/158/2039 ; 704/158/2459 ; 704/158/670 ; 704/158/672 ; 704/158/843 ; 704/158/851 ; 704/158/856 ; 704/172 ; 704/172/4081 ; AHD ; Aquaculture ; Behavioural response ; Diving behavior ; Feeding disruption ; Fishery ; Fishing gear ; Habitat exclusion ; Humanities and Social Sciences ; Lutra lutra ; Lutrinae ; Mammals ; multidisciplinary ; Predation ; Rivers ; Science ; Science (multidisciplinary) ; Seal scarer ; Sound</subject><ispartof>Scientific reports, 2024-02, Vol.14 (1), p.4988-4988, Article 4988</ispartof><rights>The Author(s) 2024</rights><rights>2024. The Author(s).</rights><rights>The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c436t-97c39196de0c351825a6ea6e2d47c7f7fa166256417b36b1e0b8000b94edfbca3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/2933291456/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2933291456?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,25753,27924,27925,37012,37013,44590,75126</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/38424202$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Stepien, Emilie Nicoline</creatorcontrib><creatorcontrib>Galatius, Anders</creatorcontrib><creatorcontrib>Hansen, Kirstin Anderson</creatorcontrib><creatorcontrib>Nabe-Nielsen, Jacob</creatorcontrib><creatorcontrib>Teilmann, Jonas</creatorcontrib><creatorcontrib>Wahlberg, Magnus</creatorcontrib><title>Response of Eurasian otters (Lutra lutra) to underwater acoustic harassment device sounds</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>Seal scarers (or acoustic harassment devices, AHDs) are designed to deter seals from fishing gear and aquaculture operations, as well as to prevent seals from entering rivers to avoid predation on valuable fish. Our study investigated the potential effects of AHDs on non-target species, specifically the Eurasian otters (
Lutra lutra
), by testing the reaction of two rehabilitated otters to simulated AHDs sounds at 1 and 14 kHz, with a received sound intensity of 105–145 dB re 1 µPa rms. The 1 kHz sounds were used to investigate alternative frequencies for scaring seals without scaring otters. The otters reacted to both 1 and 14 kHz tonal signals when retrieving fish from a feeding station 0.8 m below the surface. Their diving behaviour and time to extract food progressively increased as sound intensity increased for all tested sound levels. Notably, the sound levels used in our tests were significantly lower (40–80 dB) than the source levels from commercial AHDs. These findings highlight the importance of caution when using AHDs in river and sea habitats inhabited by otters, as AHDs can change their behaviour and potentially result in habitat exclusion.</description><subject>631/158</subject><subject>631/158/2039</subject><subject>631/158/2459</subject><subject>631/158/670</subject><subject>631/158/672</subject><subject>631/158/843</subject><subject>631/158/856</subject><subject>631/1647</subject><subject>631/1647/2198</subject><subject>631/1647/334</subject><subject>631/378</subject><subject>631/378/1488</subject><subject>631/378/1595</subject><subject>631/378/1831</subject><subject>631/378/2619</subject><subject>631/601</subject><subject>631/601/18</subject><subject>704/158</subject><subject>704/158/2039</subject><subject>704/158/2459</subject><subject>704/158/670</subject><subject>704/158/672</subject><subject>704/158/843</subject><subject>704/158/851</subject><subject>704/158/856</subject><subject>704/172</subject><subject>704/172/4081</subject><subject>AHD</subject><subject>Aquaculture</subject><subject>Behavioural response</subject><subject>Diving behavior</subject><subject>Feeding 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harassment devices, AHDs) are designed to deter seals from fishing gear and aquaculture operations, as well as to prevent seals from entering rivers to avoid predation on valuable fish. Our study investigated the potential effects of AHDs on non-target species, specifically the Eurasian otters (
Lutra lutra
), by testing the reaction of two rehabilitated otters to simulated AHDs sounds at 1 and 14 kHz, with a received sound intensity of 105–145 dB re 1 µPa rms. The 1 kHz sounds were used to investigate alternative frequencies for scaring seals without scaring otters. The otters reacted to both 1 and 14 kHz tonal signals when retrieving fish from a feeding station 0.8 m below the surface. Their diving behaviour and time to extract food progressively increased as sound intensity increased for all tested sound levels. Notably, the sound levels used in our tests were significantly lower (40–80 dB) than the source levels from commercial AHDs. These findings highlight the importance of caution when using AHDs in river and sea habitats inhabited by otters, as AHDs can change their behaviour and potentially result in habitat exclusion.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>38424202</pmid><doi>10.1038/s41598-024-55481-z</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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subjects | 631/158 631/158/2039 631/158/2459 631/158/670 631/158/672 631/158/843 631/158/856 631/1647 631/1647/2198 631/1647/334 631/378 631/378/1488 631/378/1595 631/378/1831 631/378/2619 631/601 631/601/18 704/158 704/158/2039 704/158/2459 704/158/670 704/158/672 704/158/843 704/158/851 704/158/856 704/172 704/172/4081 AHD Aquaculture Behavioural response Diving behavior Feeding disruption Fishery Fishing gear Habitat exclusion Humanities and Social Sciences Lutra lutra Lutrinae Mammals multidisciplinary Predation Rivers Science Science (multidisciplinary) Seal scarer Sound |
title | Response of Eurasian otters (Lutra lutra) to underwater acoustic harassment device sounds |
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