Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region
In Antarctica, abundant consumers rely on Antarctic krill for food, but krill are also the subject of a commercial fishery. The fishery overlaps in time and space with the foraging areas of these consumers, thus potential competition between krill fisheries and krill consumers is a major management...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media
2022
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/532251/ https://nora.nerc.ac.uk/id/eprint/532251/1/fmars-09-914726.pdf https://www.frontiersin.org/articles/10.3389/fmars.2022.914726/full |
id |
ftnerc:oai:nora.nerc.ac.uk:532251 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:532251 2023-05-15T13:41:46+02:00 Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region Reisinger, Ryan R. Trathan, Philip N. Johnson, Christopher M. Joyce, Trevor W. Durban, John W. Pitman, Robert L. Friedlaender, Ari S. 2022-07-21 text http://nora.nerc.ac.uk/id/eprint/532251/ https://nora.nerc.ac.uk/id/eprint/532251/1/fmars-09-914726.pdf https://www.frontiersin.org/articles/10.3389/fmars.2022.914726/full en eng Frontiers Media https://nora.nerc.ac.uk/id/eprint/532251/1/fmars-09-914726.pdf Reisinger, Ryan R.; Trathan, Philip N. orcid:0000-0001-6673-9930 Johnson, Christopher M.; Joyce, Trevor W.; Durban, John W.; Pitman, Robert L.; Friedlaender, Ari S. 2022 Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region. Frontiers in Marine Science, 9, 914726. 19, pp. https://doi.org/10.3389/fmars.2022.914726 <https://doi.org/10.3389/fmars.2022.914726> cc_by_4 CC-BY Publication - Article PeerReviewed 2022 ftnerc https://doi.org/10.3389/fmars.2022.914726 2023-02-04T19:53:07Z In Antarctica, abundant consumers rely on Antarctic krill for food, but krill are also the subject of a commercial fishery. The fishery overlaps in time and space with the foraging areas of these consumers, thus potential competition between krill fisheries and krill consumers is a major management concern. The fishery is managed by the Commission for the Conservation of Antarctic Marine Living Resources with an ecosystem approach, according to which fishing should not interfere with either the population growth of krill, or krill-dependent consumers. Krill catches have become increasingly spatially concentrated in a small number of hotspots, raising concerns about how local depletion of krill impacts consumers. Such concentrated fishing demonstrates that there is a mismatch between the spatial and temporal scale at which krill fisheries are currently managed, and that at which fisheries operate and consumers forage. Information on the seasonal dynamics of predator abundance and their foraging behaviour is fundamental to future precautionary management of the krill fishery. We analysed the spatiotemporal distribution of two major krill consumers – humpback and minke whales – and that of krill fishing, off the Western Antarctic Peninsula. We used whale tracking data (58 humpback whale tracks and 19 minke whale tracks) to develop spatial random forest models predicting the monthly distribution of whale foraging areas from January-July. Using these predictions, we calculated spatiotemporally-explicit geographic overlap between whales and fisheries, the latter represented by krill fishing effort and catch data. Over the krill fishing season, fishing effort and catch hotspots shifted to the southwest, into the Bransfield Strait where effort and catch was highest. Predicted humpback whale foraging areas increased in the Bransfield Strait over the same period, while predicted minke whale foraging areas showed an opposite trend. For both we predicted a whale-fishing interaction hotspot in the Bransfield Strait, ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica baleen whales Bransfield Strait Humpback Whale minke whale Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Bransfield Strait Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
In Antarctica, abundant consumers rely on Antarctic krill for food, but krill are also the subject of a commercial fishery. The fishery overlaps in time and space with the foraging areas of these consumers, thus potential competition between krill fisheries and krill consumers is a major management concern. The fishery is managed by the Commission for the Conservation of Antarctic Marine Living Resources with an ecosystem approach, according to which fishing should not interfere with either the population growth of krill, or krill-dependent consumers. Krill catches have become increasingly spatially concentrated in a small number of hotspots, raising concerns about how local depletion of krill impacts consumers. Such concentrated fishing demonstrates that there is a mismatch between the spatial and temporal scale at which krill fisheries are currently managed, and that at which fisheries operate and consumers forage. Information on the seasonal dynamics of predator abundance and their foraging behaviour is fundamental to future precautionary management of the krill fishery. We analysed the spatiotemporal distribution of two major krill consumers – humpback and minke whales – and that of krill fishing, off the Western Antarctic Peninsula. We used whale tracking data (58 humpback whale tracks and 19 minke whale tracks) to develop spatial random forest models predicting the monthly distribution of whale foraging areas from January-July. Using these predictions, we calculated spatiotemporally-explicit geographic overlap between whales and fisheries, the latter represented by krill fishing effort and catch data. Over the krill fishing season, fishing effort and catch hotspots shifted to the southwest, into the Bransfield Strait where effort and catch was highest. Predicted humpback whale foraging areas increased in the Bransfield Strait over the same period, while predicted minke whale foraging areas showed an opposite trend. For both we predicted a whale-fishing interaction hotspot in the Bransfield Strait, ... |
format |
Article in Journal/Newspaper |
author |
Reisinger, Ryan R. Trathan, Philip N. Johnson, Christopher M. Joyce, Trevor W. Durban, John W. Pitman, Robert L. Friedlaender, Ari S. |
spellingShingle |
Reisinger, Ryan R. Trathan, Philip N. Johnson, Christopher M. Joyce, Trevor W. Durban, John W. Pitman, Robert L. Friedlaender, Ari S. Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region |
author_facet |
Reisinger, Ryan R. Trathan, Philip N. Johnson, Christopher M. Joyce, Trevor W. Durban, John W. Pitman, Robert L. Friedlaender, Ari S. |
author_sort |
Reisinger, Ryan R. |
title |
Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region |
title_short |
Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region |
title_full |
Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region |
title_fullStr |
Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region |
title_full_unstemmed |
Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region |
title_sort |
spatiotemporal overlap of baleen whales and krill fisheries in the western antarctic peninsula region |
publisher |
Frontiers Media |
publishDate |
2022 |
url |
http://nora.nerc.ac.uk/id/eprint/532251/ https://nora.nerc.ac.uk/id/eprint/532251/1/fmars-09-914726.pdf https://www.frontiersin.org/articles/10.3389/fmars.2022.914726/full |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica baleen whales Bransfield Strait Humpback Whale minke whale |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica baleen whales Bransfield Strait Humpback Whale minke whale |
op_relation |
https://nora.nerc.ac.uk/id/eprint/532251/1/fmars-09-914726.pdf Reisinger, Ryan R.; Trathan, Philip N. orcid:0000-0001-6673-9930 Johnson, Christopher M.; Joyce, Trevor W.; Durban, John W.; Pitman, Robert L.; Friedlaender, Ari S. 2022 Spatiotemporal overlap of baleen whales and krill fisheries in the Western Antarctic Peninsula region. Frontiers in Marine Science, 9, 914726. 19, pp. https://doi.org/10.3389/fmars.2022.914726 <https://doi.org/10.3389/fmars.2022.914726> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.914726 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
_version_ |
1766157811025182720 |