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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Online Access: | https://hdl.handle.net/11250/3020579 https://doi.org/10.1093/icesjms/fsac096 |
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ftimr:oai:imr.brage.unit.no:11250/3020579 2023-05-15T15:39:02+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 application/pdf https://hdl.handle.net/11250/3020579 https://doi.org/10.1093/icesjms/fsac096 eng eng ICES Journal of Marine Science. 2022, 79 (5), 1583-1603. urn:issn:1054-3139 https://hdl.handle.net/11250/3020579 https://doi.org/10.1093/icesjms/fsac096 cristin:2052016 1583-1603 79 ICES Journal of Marine Science 5 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1093/icesjms/fsac096 2022-09-28T22:42:28Z 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. publishedVersion Article in Journal/Newspaper Barents Sea Denmark Strait Greenland Iceland Northeast Atlantic Sea ice Institute for Marine Research: Brage IMR Barents Sea Greenland ICES Journal of Marine Science 79 5 1583 1603 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
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. publishedVersion |
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 |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3020579 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_source |
1583-1603 79 ICES Journal of Marine Science 5 |
op_relation |
ICES Journal of Marine Science. 2022, 79 (5), 1583-1603. urn:issn:1054-3139 https://hdl.handle.net/11250/3020579 https://doi.org/10.1093/icesjms/fsac096 cristin:2052016 |
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 |
_version_ |
1766370490504445952 |