Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter
This study was performed to aid the management of the fishery for Antarctic krill Euphausia superba. Krill are an important component of the Antarctic marine ecosystem, providing a key food source for many marine predators. Additionally, krill are the target of the largest commercial fishery in the...
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ftnerc:oai:nora.nerc.ac.uk:532521 2023-05-15T13:41:46+02:00 Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter Warwick-Evans, Victoria Fielding, Sophie Reiss, C. S. Watters, G. M. Trathan, Phil N. 2022-05 text http://nora.nerc.ac.uk/id/eprint/532521/ https://nora.nerc.ac.uk/id/eprint/532521/1/Warwick-Evans2022_Article_EstimatingTheAverageDistributi.pdf https://doi.org/10.1007/s00300-022-03039-y en eng Springer https://nora.nerc.ac.uk/id/eprint/532521/1/Warwick-Evans2022_Article_EstimatingTheAverageDistributi.pdf Warwick-Evans, Victoria orcid:0000-0002-0583-5504 Fielding, Sophie orcid:0000-0002-3152-4742 Reiss, C. S.; Watters, G. M.; Trathan, Phil N. orcid:0000-0001-6673-9930 . 2022 Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter. Polar Biology, 45 (5). 857-871. https://doi.org/10.1007/s00300-022-03039-y <https://doi.org/10.1007/s00300-022-03039-y> cc_by_4 CC-BY Publication - Article PeerReviewed 2022 ftnerc https://doi.org/10.1007/s00300-022-03039-y 2023-02-04T19:53:14Z This study was performed to aid the management of the fishery for Antarctic krill Euphausia superba. Krill are an important component of the Antarctic marine ecosystem, providing a key food source for many marine predators. Additionally, krill are the target of the largest commercial fishery in the Southern Ocean, for which annual catches have been increasing and concentrating in recent years. The krill fishery is managed by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), which has endorsed a new management framework that requires information about the spatial distribution and biomass of krill. Here, we use krill density estimates from acoustic surveys and a GAMM framework to model habitat properties associated with high krill biomass during summer and winter in the northern Antarctic Peninsula region, an area important to the commercial fishery. Our models show elevated krill density associated with the shelf break, increased sea surface temperature, moderate chlorophyll-a concentration and increased salinity. During winter, our models show associations with shallow waters (< 1500 m) with low sea-ice concentration, medium sea-level anomaly and medium current speed. Our models predict temporal averages of the distribution and density of krill, which can be used to aid CCAMLR’s revised ecosystem approach to fisheries management. Our models have the potential to help in the spatial and temporal design of future acoustic surveys that would preclude the need for modelled extrapolations. We highlight that the ecosystem approach to fisheries management of krill critically depends upon such field observations at relevant spatial and temporal scales. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Polar Biology Sea ice Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral Polar Biology 45 5 857 871 |
institution |
Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
This study was performed to aid the management of the fishery for Antarctic krill Euphausia superba. Krill are an important component of the Antarctic marine ecosystem, providing a key food source for many marine predators. Additionally, krill are the target of the largest commercial fishery in the Southern Ocean, for which annual catches have been increasing and concentrating in recent years. The krill fishery is managed by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), which has endorsed a new management framework that requires information about the spatial distribution and biomass of krill. Here, we use krill density estimates from acoustic surveys and a GAMM framework to model habitat properties associated with high krill biomass during summer and winter in the northern Antarctic Peninsula region, an area important to the commercial fishery. Our models show elevated krill density associated with the shelf break, increased sea surface temperature, moderate chlorophyll-a concentration and increased salinity. During winter, our models show associations with shallow waters (< 1500 m) with low sea-ice concentration, medium sea-level anomaly and medium current speed. Our models predict temporal averages of the distribution and density of krill, which can be used to aid CCAMLR’s revised ecosystem approach to fisheries management. Our models have the potential to help in the spatial and temporal design of future acoustic surveys that would preclude the need for modelled extrapolations. We highlight that the ecosystem approach to fisheries management of krill critically depends upon such field observations at relevant spatial and temporal scales. |
format |
Article in Journal/Newspaper |
author |
Warwick-Evans, Victoria Fielding, Sophie Reiss, C. S. Watters, G. M. Trathan, Phil N. |
spellingShingle |
Warwick-Evans, Victoria Fielding, Sophie Reiss, C. S. Watters, G. M. Trathan, Phil N. Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter |
author_facet |
Warwick-Evans, Victoria Fielding, Sophie Reiss, C. S. Watters, G. M. Trathan, Phil N. |
author_sort |
Warwick-Evans, Victoria |
title |
Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter |
title_short |
Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter |
title_full |
Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter |
title_fullStr |
Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter |
title_full_unstemmed |
Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter |
title_sort |
estimating the average distribution of antarctic krill euphausia superba at the northern antarctic peninsula during austral summer and winter |
publisher |
Springer |
publishDate |
2022 |
url |
http://nora.nerc.ac.uk/id/eprint/532521/ https://nora.nerc.ac.uk/id/eprint/532521/1/Warwick-Evans2022_Article_EstimatingTheAverageDistributi.pdf https://doi.org/10.1007/s00300-022-03039-y |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Polar Biology Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Polar Biology Sea ice Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/532521/1/Warwick-Evans2022_Article_EstimatingTheAverageDistributi.pdf Warwick-Evans, Victoria orcid:0000-0002-0583-5504 Fielding, Sophie orcid:0000-0002-3152-4742 Reiss, C. S.; Watters, G. M.; Trathan, Phil N. orcid:0000-0001-6673-9930 . 2022 Estimating the average distribution of Antarctic krill Euphausia superba at the northern Antarctic Peninsula during austral summer and winter. Polar Biology, 45 (5). 857-871. https://doi.org/10.1007/s00300-022-03039-y <https://doi.org/10.1007/s00300-022-03039-y> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00300-022-03039-y |
container_title |
Polar Biology |
container_volume |
45 |
container_issue |
5 |
container_start_page |
857 |
op_container_end_page |
871 |
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1766157860207591424 |