Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management.
Ecosystem dynamics at the northwest Antarctic Peninsula are driven by interactions between physical and biological processes. For example, baleen whale populations are recovering from commercial harvesting against the backdrop of rapid climate change, including reduced sea ice extent and changing ec...
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2022
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Online Access: | http://hdl.handle.net/1834/42801 https://doi.org/10.1002/ecs2.4083 |
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ftoceandocs:oai:aquadocs.org:1834/42801 2023-10-25T01:32:10+02:00 Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. Warwick-Evans, V. Kelly, N. Dalla Rosa, L. Friedlaender, A. Hinke, J. T. Kim, J. H. Kokubun, N. Santora, J. A. Secchi, E. R. Seyboth, E. Trathan, P. N. Antarctic coast 2022 24pp. http://hdl.handle.net/1834/42801 https://doi.org/10.1002/ecs2.4083 en eng https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.4083 https://doi.org/10.1002/ecs2.4083 http://hdl.handle.net/1834/42801 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Antarctic ecosystem Fisheries management Habitat modeling Humpback whales Penguins Seabirds Spatial ecology Journal Contribution 2022 ftoceandocs https://doi.org/10.1002/ecs2.4083 2023-09-27T22:24:55Z Ecosystem dynamics at the northwest Antarctic Peninsula are driven by interactions between physical and biological processes. For example, baleen whale populations are recovering from commercial harvesting against the backdrop of rapid climate change, including reduced sea ice extent and changing ecosystem composition. Concurrently, the commercial harvesting of Antarctic krill is increasing, with the potential to increase the likelihood for competition with and between krill predators and the fishery. However, understanding the ecology, abundance, and spatial distribution of krill predators is often limited, outdated, or at spatial scales that do not match those desired for effective fisheries management. We update current knowledge of predator dependence on krill by integrating telemetry-based data, at-sea observational surveys, estimates of predator abundance, and physiological data to estimate the spatial distribution of krill consumption during the austral summer by three species of Pygoscelis penguin, 11 species of flying seabirds, one species of pinniped, and two species of baleen whale. Our models show that the majority of important areas for krill predator foraging are close to penguin breeding colonies in nearshore areas where humpback whales also regularly feed, and along the shelf-break, though we caution that not all known krill predators are included in these analyses. We show that krill consumption is highly variable across the region, and often concentrated at fine spatial scales, emphasizing the need for the management of the local krill fishery at relevant temporal and spatial scales. We also note that krill consumption by recovering populations of krill predators provides further evidence in support of the krill surplus hypothesis, and highlight that despite less than comprehensive data, cetaceans are likely to consume a significant proportion of the krill consumed by natural predators but are not currently considered directly in the management of the krill fishery. If management of the krill ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula baleen whale Sea ice IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Antarctic Antarctic Peninsula Austral Ecosphere 13 6 |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Antarctic ecosystem Fisheries management Habitat modeling Humpback whales Penguins Seabirds Spatial ecology |
spellingShingle |
Antarctic ecosystem Fisheries management Habitat modeling Humpback whales Penguins Seabirds Spatial ecology Warwick-Evans, V. Kelly, N. Dalla Rosa, L. Friedlaender, A. Hinke, J. T. Kim, J. H. Kokubun, N. Santora, J. A. Secchi, E. R. Seyboth, E. Trathan, P. N. Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. |
topic_facet |
Antarctic ecosystem Fisheries management Habitat modeling Humpback whales Penguins Seabirds Spatial ecology |
description |
Ecosystem dynamics at the northwest Antarctic Peninsula are driven by interactions between physical and biological processes. For example, baleen whale populations are recovering from commercial harvesting against the backdrop of rapid climate change, including reduced sea ice extent and changing ecosystem composition. Concurrently, the commercial harvesting of Antarctic krill is increasing, with the potential to increase the likelihood for competition with and between krill predators and the fishery. However, understanding the ecology, abundance, and spatial distribution of krill predators is often limited, outdated, or at spatial scales that do not match those desired for effective fisheries management. We update current knowledge of predator dependence on krill by integrating telemetry-based data, at-sea observational surveys, estimates of predator abundance, and physiological data to estimate the spatial distribution of krill consumption during the austral summer by three species of Pygoscelis penguin, 11 species of flying seabirds, one species of pinniped, and two species of baleen whale. Our models show that the majority of important areas for krill predator foraging are close to penguin breeding colonies in nearshore areas where humpback whales also regularly feed, and along the shelf-break, though we caution that not all known krill predators are included in these analyses. We show that krill consumption is highly variable across the region, and often concentrated at fine spatial scales, emphasizing the need for the management of the local krill fishery at relevant temporal and spatial scales. We also note that krill consumption by recovering populations of krill predators provides further evidence in support of the krill surplus hypothesis, and highlight that despite less than comprehensive data, cetaceans are likely to consume a significant proportion of the krill consumed by natural predators but are not currently considered directly in the management of the krill fishery. If management of the krill ... |
format |
Article in Journal/Newspaper |
author |
Warwick-Evans, V. Kelly, N. Dalla Rosa, L. Friedlaender, A. Hinke, J. T. Kim, J. H. Kokubun, N. Santora, J. A. Secchi, E. R. Seyboth, E. Trathan, P. N. |
author_facet |
Warwick-Evans, V. Kelly, N. Dalla Rosa, L. Friedlaender, A. Hinke, J. T. Kim, J. H. Kokubun, N. Santora, J. A. Secchi, E. R. Seyboth, E. Trathan, P. N. |
author_sort |
Warwick-Evans, V. |
title |
Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. |
title_short |
Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. |
title_full |
Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. |
title_fullStr |
Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. |
title_full_unstemmed |
Using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. |
title_sort |
using seabird and whale distribution models to estimate spatial consumption of krill to inform fishery management. |
publishDate |
2022 |
url |
http://hdl.handle.net/1834/42801 https://doi.org/10.1002/ecs2.4083 |
op_coverage |
Antarctic coast |
geographic |
Antarctic Antarctic Peninsula Austral |
geographic_facet |
Antarctic Antarctic Peninsula Austral |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula baleen whale Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula baleen whale Sea ice |
op_relation |
https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.4083 https://doi.org/10.1002/ecs2.4083 http://hdl.handle.net/1834/42801 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ecs2.4083 |
container_title |
Ecosphere |
container_volume |
13 |
container_issue |
6 |
_version_ |
1780727752009187328 |