Marine mammal consumption and fisheries removals in the Nordic and Barents Seas
In this study, we assess prey consumption by the marine mammal community in the northeast Atlantic [including 21 taxa, across three regions: (I) the Icelandic shelf, Denmark Strait, and Iceland Sea (ICE); (II) the Greenland and Norwegian Seas (GN); and (III) the Barents Sea (BS)], and compare mammal...
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Oxford University Press
2022
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Online Access: | https://hdl.handle.net/10037/26880 https://doi.org/10.1093/icesjms/fsac096 |
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ftunivtroemsoe:oai:munin.uit.no:10037/26880 2023-05-15T15:39:03+02:00 Marine mammal consumption and fisheries removals in the Nordic and Barents Seas Skern-Mauritzen, Mette Lindstrøm, Ulf Ove Biuw, Martin Elvarsson, Bjarki Gunnlaugsson, Thorvaldur Haug, Tore Kovacs, Kit M. Lydersen, Christian McBride, Margaret Mikkelsen, Bjarni Øien, Nils Inge Víkingsson, Gísli 2022-05-28 https://hdl.handle.net/10037/26880 https://doi.org/10.1093/icesjms/fsac096 eng eng Oxford University Press ICES Journal of Marine Science Skern-Mauritzen, Lindstrøm, Biuw, Elvarsson, Gunnlaugsson, Haug, Kovacs, Lydersen, McBride, Mikkelsen, Øien, Víkingsson. Marine mammal consumption and fisheries removals in the Nordic and Barents Seas. ICES Journal of Marine Science. 2022;79(5):1583-1603 FRIDAID 2052016 doi:10.1093/icesjms/fsac096 1054-3139 1095-9289 https://hdl.handle.net/10037/26880 openAccess Copyright 2022 The Author(s) Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.1093/icesjms/fsac096 2022-09-21T23:00:39Z In this study, we assess prey consumption by the marine mammal community in the northeast Atlantic [including 21 taxa, across three regions: (I) the Icelandic shelf, Denmark Strait, and Iceland Sea (ICE); (II) the Greenland and Norwegian Seas (GN); and (III) the Barents Sea (BS)], and compare mammal requirements with removals by fisheries. To determine prey needs, estimates of energetic requirements were combined with diet and abundance information for parameterizing simple allometric scaling models, taking uncertainties into account through bootstrapping procedures. In total, marine mammals in the ICE, GN, and BS consumed 13.4 [Confidence Interval (CI): 5.6–25.0], 4.6 (CI: 1.9–8.6), and 7.1 (CI: 2.8–13.8) million tonnes of prey year–1. Fisheries removed 1.55, 1.45, and 1.16 million tonnes year–1 from these three areas, respectively. While fisheries generally operate at significantly higher trophic levels than marine mammals, we find that the potential for direct competition between marine mammals and fisheries is strongest in the GN and weakest in the BS. Furthermore, our results also demonstrate significant changes in mammal consumption compared to previous and more focused studies over the last decades. These changes likely reflect both ongoing population recoveries from historic whaling and the current rapid physical and biological changes of these high-latitude systems. We argue that changing distributions and abundances of mammals should be considered when establishing fisheries harvesting strategies, to ensure effective fisheries management and good conservation practices of top predators in such rapidly changing systems. Article in Journal/Newspaper Barents Sea Denmark Strait Greenland Iceland Northeast Atlantic Sea ice University of Tromsø: Munin Open Research Archive Barents Sea Greenland ICES Journal of Marine Science 79 5 1583 1603 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
In this study, we assess prey consumption by the marine mammal community in the northeast Atlantic [including 21 taxa, across three regions: (I) the Icelandic shelf, Denmark Strait, and Iceland Sea (ICE); (II) the Greenland and Norwegian Seas (GN); and (III) the Barents Sea (BS)], and compare mammal requirements with removals by fisheries. To determine prey needs, estimates of energetic requirements were combined with diet and abundance information for parameterizing simple allometric scaling models, taking uncertainties into account through bootstrapping procedures. In total, marine mammals in the ICE, GN, and BS consumed 13.4 [Confidence Interval (CI): 5.6–25.0], 4.6 (CI: 1.9–8.6), and 7.1 (CI: 2.8–13.8) million tonnes of prey year–1. Fisheries removed 1.55, 1.45, and 1.16 million tonnes year–1 from these three areas, respectively. While fisheries generally operate at significantly higher trophic levels than marine mammals, we find that the potential for direct competition between marine mammals and fisheries is strongest in the GN and weakest in the BS. Furthermore, our results also demonstrate significant changes in mammal consumption compared to previous and more focused studies over the last decades. These changes likely reflect both ongoing population recoveries from historic whaling and the current rapid physical and biological changes of these high-latitude systems. We argue that changing distributions and abundances of mammals should be considered when establishing fisheries harvesting strategies, to ensure effective fisheries management and good conservation practices of top predators in such rapidly changing systems. |
format |
Article in Journal/Newspaper |
author |
Skern-Mauritzen, Mette Lindstrøm, Ulf Ove Biuw, Martin Elvarsson, Bjarki Gunnlaugsson, Thorvaldur Haug, Tore Kovacs, Kit M. Lydersen, Christian McBride, Margaret Mikkelsen, Bjarni Øien, Nils Inge Víkingsson, Gísli |
spellingShingle |
Skern-Mauritzen, Mette Lindstrøm, Ulf Ove Biuw, Martin Elvarsson, Bjarki Gunnlaugsson, Thorvaldur Haug, Tore Kovacs, Kit M. Lydersen, Christian McBride, Margaret Mikkelsen, Bjarni Øien, Nils Inge Víkingsson, Gísli Marine mammal consumption and fisheries removals in the Nordic and Barents Seas |
author_facet |
Skern-Mauritzen, Mette Lindstrøm, Ulf Ove Biuw, Martin Elvarsson, Bjarki Gunnlaugsson, Thorvaldur Haug, Tore Kovacs, Kit M. Lydersen, Christian McBride, Margaret Mikkelsen, Bjarni Øien, Nils Inge Víkingsson, Gísli |
author_sort |
Skern-Mauritzen, Mette |
title |
Marine mammal consumption and fisheries removals in the Nordic and Barents Seas |
title_short |
Marine mammal consumption and fisheries removals in the Nordic and Barents Seas |
title_full |
Marine mammal consumption and fisheries removals in the Nordic and Barents Seas |
title_fullStr |
Marine mammal consumption and fisheries removals in the Nordic and Barents Seas |
title_full_unstemmed |
Marine mammal consumption and fisheries removals in the Nordic and Barents Seas |
title_sort |
marine mammal consumption and fisheries removals in the nordic and barents seas |
publisher |
Oxford University Press |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/26880 https://doi.org/10.1093/icesjms/fsac096 |
geographic |
Barents Sea Greenland |
geographic_facet |
Barents Sea Greenland |
genre |
Barents Sea Denmark Strait Greenland Iceland Northeast Atlantic Sea ice |
genre_facet |
Barents Sea Denmark Strait Greenland Iceland Northeast Atlantic Sea ice |
op_relation |
ICES Journal of Marine Science Skern-Mauritzen, Lindstrøm, Biuw, Elvarsson, Gunnlaugsson, Haug, Kovacs, Lydersen, McBride, Mikkelsen, Øien, Víkingsson. Marine mammal consumption and fisheries removals in the Nordic and Barents Seas. ICES Journal of Marine Science. 2022;79(5):1583-1603 FRIDAID 2052016 doi:10.1093/icesjms/fsac096 1054-3139 1095-9289 https://hdl.handle.net/10037/26880 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.1093/icesjms/fsac096 |
container_title |
ICES Journal of Marine Science |
container_volume |
79 |
container_issue |
5 |
container_start_page |
1583 |
op_container_end_page |
1603 |
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1766370492616278016 |