Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic
1. Quantifying the diet composition of apex marine predators such as killer whales (Orcinus orca) is critical to assessing their food web impacts. Yet, with few exceptions, the feeding ecology of these apex predators remains poorly understood. 2. Here, we use our newly validated quantitative fatty a...
Published in: | Journal of Animal Ecology |
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Online Access: | http://hdl.handle.net/10852/102652 https://doi.org/10.1111/1365-2656.13920 |
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ftoslouniv:oai:www.duo.uio.no:10852/102652 2023-07-30T04:00:07+02:00 Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic ENEngelskEnglishQuantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic Remili, Anaïs Dietz, Rune Sonne, Christian Samarra, Filipa I. P. Rikardsen, Audun H. Kettemer, Lisa Elena Ferguson, Steven H. Watt, Cortney A. Matthews, Cory J. D. Kiszka, Jeremy J. Jourdain, Eve Marie Borgå, Katrine Ruus, Anders Granquist, Sandra M. Rosing-Asvid, Aqqalu McKinney, Melissa A. 2023-05-04T11:05:29Z http://hdl.handle.net/10852/102652 https://doi.org/10.1111/1365-2656.13920 EN eng OTHER/Canada Foundation for Innovation: 37873 OTHER/Species at Risk Act OTHER/Natural Sciences and Engineering Research Council of Canad NFR/315392 OTHER/Fonds de Recherche du Québec Nature et Technologies OTHER/Icelandic Research Fund START Postdoctoral Fellowship OTHER/Canada Research Chair OTHER/Nunavut General Monitoring Plan OTHER/Office Français de la Biodiversité EI/Universitetet i Tromsø OTHER/Norwegian Orca Survey OTHER/Regional Research Council of Norway (Troms) OTHER/Nunavut Wildlife Management Board OTHER/Danish Cooperation for Environment in the Arctic Remili, Anaïs Dietz, Rune Sonne, Christian Samarra, Filipa I. P. Rikardsen, Audun H. Kettemer, Lisa Elena Ferguson, Steven H. Watt, Cortney A. Matthews, Cory J. D. Kiszka, Jeremy J. Jourdain, Eve Marie Borgå, Katrine Ruus, Anders Granquist, Sandra M. Rosing-Asvid, Aqqalu McKinney, Melissa A. . Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic. Journal of Animal Ecology. 2023 http://hdl.handle.net/10852/102652 2145387 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Animal Ecology&rft.volume=&rft.spage=&rft.date=2023 Journal of Animal Ecology 92 6 1216 1229 0 https://doi.org/10.1111/1365-2656.13920 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ 0021-8790 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2023 ftoslouniv https://doi.org/10.1111/1365-2656.13920 2023-07-12T22:38:52Z 1. Quantifying the diet composition of apex marine predators such as killer whales (Orcinus orca) is critical to assessing their food web impacts. Yet, with few exceptions, the feeding ecology of these apex predators remains poorly understood. 2. Here, we use our newly validated quantitative fatty acid signature analysis (QFASA) approach on nearly 200 killer whales and over 900 potential prey to model their diets across the 5000 km span of the North Atlantic. 3. Diet estimates show that killer whales mainly consume other whales in the western North Atlantic (Canadian Arctic, Eastern Canada), seals in the mid-North Atlantic (Greenland), and fish in the eastern North Atlantic (Iceland, Faroe Islands, Norway). Nonetheless, diet estimates also varied widely among individuals within most regions. This level of inter-individual feeding variation should be considered for future ecological studies focusing on killer whales in the North Atlantic and other oceans. 4. These estimates reveal remarkable population- and individual-level variation in the trophic ecology of these killer whales, which can help to assess how their predation impacts community and ecosystem dynamics in changing North Atlantic marine ecosystems. 5. This new approach provides researchers with an invaluable tool to study the feeding ecology of oceanic top predators. Article in Journal/Newspaper Arctic Arctic Faroe Islands Greenland Iceland North Atlantic Orca Orcinus orca Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Faroe Islands Canada Greenland Norway Journal of Animal Ecology 92 6 1216 1229 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
1. Quantifying the diet composition of apex marine predators such as killer whales (Orcinus orca) is critical to assessing their food web impacts. Yet, with few exceptions, the feeding ecology of these apex predators remains poorly understood. 2. Here, we use our newly validated quantitative fatty acid signature analysis (QFASA) approach on nearly 200 killer whales and over 900 potential prey to model their diets across the 5000 km span of the North Atlantic. 3. Diet estimates show that killer whales mainly consume other whales in the western North Atlantic (Canadian Arctic, Eastern Canada), seals in the mid-North Atlantic (Greenland), and fish in the eastern North Atlantic (Iceland, Faroe Islands, Norway). Nonetheless, diet estimates also varied widely among individuals within most regions. This level of inter-individual feeding variation should be considered for future ecological studies focusing on killer whales in the North Atlantic and other oceans. 4. These estimates reveal remarkable population- and individual-level variation in the trophic ecology of these killer whales, which can help to assess how their predation impacts community and ecosystem dynamics in changing North Atlantic marine ecosystems. 5. This new approach provides researchers with an invaluable tool to study the feeding ecology of oceanic top predators. |
format |
Article in Journal/Newspaper |
author |
Remili, Anaïs Dietz, Rune Sonne, Christian Samarra, Filipa I. P. Rikardsen, Audun H. Kettemer, Lisa Elena Ferguson, Steven H. Watt, Cortney A. Matthews, Cory J. D. Kiszka, Jeremy J. Jourdain, Eve Marie Borgå, Katrine Ruus, Anders Granquist, Sandra M. Rosing-Asvid, Aqqalu McKinney, Melissa A. |
spellingShingle |
Remili, Anaïs Dietz, Rune Sonne, Christian Samarra, Filipa I. P. Rikardsen, Audun H. Kettemer, Lisa Elena Ferguson, Steven H. Watt, Cortney A. Matthews, Cory J. D. Kiszka, Jeremy J. Jourdain, Eve Marie Borgå, Katrine Ruus, Anders Granquist, Sandra M. Rosing-Asvid, Aqqalu McKinney, Melissa A. Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic |
author_facet |
Remili, Anaïs Dietz, Rune Sonne, Christian Samarra, Filipa I. P. Rikardsen, Audun H. Kettemer, Lisa Elena Ferguson, Steven H. Watt, Cortney A. Matthews, Cory J. D. Kiszka, Jeremy J. Jourdain, Eve Marie Borgå, Katrine Ruus, Anders Granquist, Sandra M. Rosing-Asvid, Aqqalu McKinney, Melissa A. |
author_sort |
Remili, Anaïs |
title |
Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic |
title_short |
Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic |
title_full |
Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic |
title_fullStr |
Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic |
title_full_unstemmed |
Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic |
title_sort |
quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the north atlantic |
publishDate |
2023 |
url |
http://hdl.handle.net/10852/102652 https://doi.org/10.1111/1365-2656.13920 |
geographic |
Arctic Faroe Islands Canada Greenland Norway |
geographic_facet |
Arctic Faroe Islands Canada Greenland Norway |
genre |
Arctic Arctic Faroe Islands Greenland Iceland North Atlantic Orca Orcinus orca |
genre_facet |
Arctic Arctic Faroe Islands Greenland Iceland North Atlantic Orca Orcinus orca |
op_source |
0021-8790 |
op_relation |
OTHER/Canada Foundation for Innovation: 37873 OTHER/Species at Risk Act OTHER/Natural Sciences and Engineering Research Council of Canad NFR/315392 OTHER/Fonds de Recherche du Québec Nature et Technologies OTHER/Icelandic Research Fund START Postdoctoral Fellowship OTHER/Canada Research Chair OTHER/Nunavut General Monitoring Plan OTHER/Office Français de la Biodiversité EI/Universitetet i Tromsø OTHER/Norwegian Orca Survey OTHER/Regional Research Council of Norway (Troms) OTHER/Nunavut Wildlife Management Board OTHER/Danish Cooperation for Environment in the Arctic Remili, Anaïs Dietz, Rune Sonne, Christian Samarra, Filipa I. P. Rikardsen, Audun H. Kettemer, Lisa Elena Ferguson, Steven H. Watt, Cortney A. Matthews, Cory J. D. Kiszka, Jeremy J. Jourdain, Eve Marie Borgå, Katrine Ruus, Anders Granquist, Sandra M. Rosing-Asvid, Aqqalu McKinney, Melissa A. . Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic. Journal of Animal Ecology. 2023 http://hdl.handle.net/10852/102652 2145387 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Animal Ecology&rft.volume=&rft.spage=&rft.date=2023 Journal of Animal Ecology 92 6 1216 1229 0 https://doi.org/10.1111/1365-2656.13920 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2656.13920 |
container_title |
Journal of Animal Ecology |
container_volume |
92 |
container_issue |
6 |
container_start_page |
1216 |
op_container_end_page |
1229 |
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1772810721501904896 |