Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia
The objective of the ecosystem approach to fisheries management is to sustain healthy marine ecosystems and the fisheries they support. One of the earliest implementations was in the Southern Ocean, where decision rules and stock reference points were developed for managing the Antarctic krill fishe...
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Oxford University Press
2021
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Online Access: | http://nora.nerc.ac.uk/id/eprint/528444/ https://nora.nerc.ac.uk/id/eprint/528444/1/fsab092.pdf https://academic.oup.com/icesjms/advance-article/doi/10.1093/icesjms/fsab092/6295716 |
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ftnerc:oai:nora.nerc.ac.uk:528444 2023-05-15T13:41:45+02:00 Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia Trathan, P.N. Fielding, S. Hollyman, P. Murphy, E.J. Warwick-Evans, V. Collins, M.A. 2021-09 text http://nora.nerc.ac.uk/id/eprint/528444/ https://nora.nerc.ac.uk/id/eprint/528444/1/fsab092.pdf https://academic.oup.com/icesjms/advance-article/doi/10.1093/icesjms/fsab092/6295716 en eng Oxford University Press https://nora.nerc.ac.uk/id/eprint/528444/1/fsab092.pdf Trathan, P.N. orcid:0000-0001-6673-9930 Fielding, S. orcid:0000-0002-3152-4742 Hollyman, P. orcid:0000-0003-2665-5075 Murphy, E.J. orcid:0000-0002-7369-9196 Warwick-Evans, V. orcid:0000-0002-0583-5504 Collins, M.A. orcid:0000-0001-7132-8650 . 2021 Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia. ICES Journal of Marine Science, 78 (6), fsab092. 2065-2081. https://doi.org/10.1093/icesjms/fsab092 <https://doi.org/10.1093/icesjms/fsab092> cc_by_4 CC-BY Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1093/icesjms/fsab092 2023-02-04T19:51:03Z The objective of the ecosystem approach to fisheries management is to sustain healthy marine ecosystems and the fisheries they support. One of the earliest implementations was in the Southern Ocean, where decision rules and stock reference points were developed for managing the Antarctic krill fishery, together with an ecosystem-monitoring programme intended to aid management decisions. This latter component has not been incorporated directly into management, so here, we consider variability in the krill fishery at South Georgia, relating it to physical and biological monitoring indices, finding sea surface temperature to be a key correlate with both annual catch and long-term biological indices. Some indices from krill predators showed significant positive relationships with krill harvesting in the preceding winter, presumably indicative of the importance of winter foraging conditions. We explore how ecological structure affects results, examining two monitoring sites 100 km apart. Results suggest different biological conditions at the two sites, probably reflecting different scales of ecosystem operation, emphasizing that an appreciation of scale will enhance krill fishery management. Finally, in reviewing different drivers of ecological change, we identify important additional monitoring that would help better reflect ecosystem status, improve the utility of CEMP, providing information necessary for the ecosystem approach at South Georgia. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic ICES Journal of Marine Science |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The objective of the ecosystem approach to fisheries management is to sustain healthy marine ecosystems and the fisheries they support. One of the earliest implementations was in the Southern Ocean, where decision rules and stock reference points were developed for managing the Antarctic krill fishery, together with an ecosystem-monitoring programme intended to aid management decisions. This latter component has not been incorporated directly into management, so here, we consider variability in the krill fishery at South Georgia, relating it to physical and biological monitoring indices, finding sea surface temperature to be a key correlate with both annual catch and long-term biological indices. Some indices from krill predators showed significant positive relationships with krill harvesting in the preceding winter, presumably indicative of the importance of winter foraging conditions. We explore how ecological structure affects results, examining two monitoring sites 100 km apart. Results suggest different biological conditions at the two sites, probably reflecting different scales of ecosystem operation, emphasizing that an appreciation of scale will enhance krill fishery management. Finally, in reviewing different drivers of ecological change, we identify important additional monitoring that would help better reflect ecosystem status, improve the utility of CEMP, providing information necessary for the ecosystem approach at South Georgia. |
format |
Article in Journal/Newspaper |
author |
Trathan, P.N. Fielding, S. Hollyman, P. Murphy, E.J. Warwick-Evans, V. Collins, M.A. |
spellingShingle |
Trathan, P.N. Fielding, S. Hollyman, P. Murphy, E.J. Warwick-Evans, V. Collins, M.A. Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia |
author_facet |
Trathan, P.N. Fielding, S. Hollyman, P. Murphy, E.J. Warwick-Evans, V. Collins, M.A. |
author_sort |
Trathan, P.N. |
title |
Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia |
title_short |
Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia |
title_full |
Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia |
title_fullStr |
Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia |
title_full_unstemmed |
Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia |
title_sort |
enhancing the ecosystem approach for the fishery for antarctic krill within the complex, variable and changing ecosystem at south georgia |
publisher |
Oxford University Press |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/528444/ https://nora.nerc.ac.uk/id/eprint/528444/1/fsab092.pdf https://academic.oup.com/icesjms/advance-article/doi/10.1093/icesjms/fsab092/6295716 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/528444/1/fsab092.pdf Trathan, P.N. orcid:0000-0001-6673-9930 Fielding, S. orcid:0000-0002-3152-4742 Hollyman, P. orcid:0000-0003-2665-5075 Murphy, E.J. orcid:0000-0002-7369-9196 Warwick-Evans, V. orcid:0000-0002-0583-5504 Collins, M.A. orcid:0000-0001-7132-8650 . 2021 Enhancing the ecosystem approach for the fishery for Antarctic krill within the complex, variable and changing ecosystem at South Georgia. ICES Journal of Marine Science, 78 (6), fsab092. 2065-2081. https://doi.org/10.1093/icesjms/fsab092 <https://doi.org/10.1093/icesjms/fsab092> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1093/icesjms/fsab092 |
container_title |
ICES Journal of Marine Science |
_version_ |
1766157027148562432 |