Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus)
The vocal repertoire of walruses has been widely described in the bioacoustic literature. These marine mammals produce several distinct types of vocalizations for intraspecific communication during the breeding season. In this study, we provide the first evidence of walrus-generated sounds during fo...
Published in: | Polar Biology |
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Language: | English |
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2022
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Online Access: | https://pure.au.dk/portal/da/publications/passive-acoustics-suggest-two-different-feeding-mechanisms-in-the-atlantic-walrus-odobenus-rosmarus-rosmarus(782fc52e-08d9-40b3-98f2-d430ff3542b4).html https://doi.org/10.1007/s00300-022-03055-y http://www.scopus.com/inward/record.url?scp=85132314812&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/782fc52e-08d9-40b3-98f2-d430ff3542b4 2023-05-15T17:52:25+02:00 Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) Jézéquel, Youenn Mathias, Delphine Olivier, Frédéric Amice, Erwan Chauvaud, Sylvain Jolivet, Aurélie Bonnel, Julien Sejr, Mikael K. Chauvaud, Laurent 2022-06 https://pure.au.dk/portal/da/publications/passive-acoustics-suggest-two-different-feeding-mechanisms-in-the-atlantic-walrus-odobenus-rosmarus-rosmarus(782fc52e-08d9-40b3-98f2-d430ff3542b4).html https://doi.org/10.1007/s00300-022-03055-y http://www.scopus.com/inward/record.url?scp=85132314812&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Jézéquel , Y , Mathias , D , Olivier , F , Amice , E , Chauvaud , S , Jolivet , A , Bonnel , J , Sejr , M K & Chauvaud , L 2022 , ' Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) ' , Polar Biology , vol. 45 , no. 6 , pp. 1157-1162 . https://doi.org/10.1007/s00300-022-03055-y Bioacoustics Bivalves Feeding behavior Marine mammal Young Sound fjord article 2022 ftuniaarhuspubl https://doi.org/10.1007/s00300-022-03055-y 2022-08-10T22:52:35Z The vocal repertoire of walruses has been widely described in the bioacoustic literature. These marine mammals produce several distinct types of vocalizations for intraspecific communication during the breeding season. In this study, we provide the first evidence of walrus-generated sounds during foraging dives when they feed on bivalves. We recorded two types of sounds that we associated to different feeding mechanisms. The first sound type was brief and low in frequency that we relate to the suction of soft parts from the bivalves’ shells through the use of walrus powerful tongues, which is the common feeding behavior reported in the walrus literature. We also recorded a second sound type composed of multiple broadband pulse trains. We hypothesize the latter were associated with bivalve shell cracking by walruses, which would represent a new feeding mechanism in the walrus literature. This new feeding mechanism is either related to bivalves’ ecology or to walruses removing the sediment when searching for food. During this study, we observed bivalves lying on the seafloor instead of being buried in the sediment in walrus feeding areas while scuba diving. As a result, walruses cannot use suction to feed on soft body part of bivalves and have to use another strategy, mastication. Our findings provide a first step towards using passive acoustics to quantify walrus behavior and feeding ecology. Article in Journal/Newspaper Odobenus rosmarus Polar Biology walrus* Aarhus University: Research Polar Biology 45 6 1157 1162 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Bioacoustics Bivalves Feeding behavior Marine mammal Young Sound fjord |
spellingShingle |
Bioacoustics Bivalves Feeding behavior Marine mammal Young Sound fjord Jézéquel, Youenn Mathias, Delphine Olivier, Frédéric Amice, Erwan Chauvaud, Sylvain Jolivet, Aurélie Bonnel, Julien Sejr, Mikael K. Chauvaud, Laurent Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) |
topic_facet |
Bioacoustics Bivalves Feeding behavior Marine mammal Young Sound fjord |
description |
The vocal repertoire of walruses has been widely described in the bioacoustic literature. These marine mammals produce several distinct types of vocalizations for intraspecific communication during the breeding season. In this study, we provide the first evidence of walrus-generated sounds during foraging dives when they feed on bivalves. We recorded two types of sounds that we associated to different feeding mechanisms. The first sound type was brief and low in frequency that we relate to the suction of soft parts from the bivalves’ shells through the use of walrus powerful tongues, which is the common feeding behavior reported in the walrus literature. We also recorded a second sound type composed of multiple broadband pulse trains. We hypothesize the latter were associated with bivalve shell cracking by walruses, which would represent a new feeding mechanism in the walrus literature. This new feeding mechanism is either related to bivalves’ ecology or to walruses removing the sediment when searching for food. During this study, we observed bivalves lying on the seafloor instead of being buried in the sediment in walrus feeding areas while scuba diving. As a result, walruses cannot use suction to feed on soft body part of bivalves and have to use another strategy, mastication. Our findings provide a first step towards using passive acoustics to quantify walrus behavior and feeding ecology. |
format |
Article in Journal/Newspaper |
author |
Jézéquel, Youenn Mathias, Delphine Olivier, Frédéric Amice, Erwan Chauvaud, Sylvain Jolivet, Aurélie Bonnel, Julien Sejr, Mikael K. Chauvaud, Laurent |
author_facet |
Jézéquel, Youenn Mathias, Delphine Olivier, Frédéric Amice, Erwan Chauvaud, Sylvain Jolivet, Aurélie Bonnel, Julien Sejr, Mikael K. Chauvaud, Laurent |
author_sort |
Jézéquel, Youenn |
title |
Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) |
title_short |
Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) |
title_full |
Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) |
title_fullStr |
Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) |
title_full_unstemmed |
Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) |
title_sort |
passive acoustics suggest two different feeding mechanisms in the atlantic walrus (odobenus rosmarus rosmarus) |
publishDate |
2022 |
url |
https://pure.au.dk/portal/da/publications/passive-acoustics-suggest-two-different-feeding-mechanisms-in-the-atlantic-walrus-odobenus-rosmarus-rosmarus(782fc52e-08d9-40b3-98f2-d430ff3542b4).html https://doi.org/10.1007/s00300-022-03055-y http://www.scopus.com/inward/record.url?scp=85132314812&partnerID=8YFLogxK |
genre |
Odobenus rosmarus Polar Biology walrus* |
genre_facet |
Odobenus rosmarus Polar Biology walrus* |
op_source |
Jézéquel , Y , Mathias , D , Olivier , F , Amice , E , Chauvaud , S , Jolivet , A , Bonnel , J , Sejr , M K & Chauvaud , L 2022 , ' Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) ' , Polar Biology , vol. 45 , no. 6 , pp. 1157-1162 . https://doi.org/10.1007/s00300-022-03055-y |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00300-022-03055-y |
container_title |
Polar Biology |
container_volume |
45 |
container_issue |
6 |
container_start_page |
1157 |
op_container_end_page |
1162 |
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1766159831405690880 |