Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx
Understanding how predator foraging behaviour is influenced by the distribution and abundance of prey is a fundamental challenge in marine foraging ecology. This is particularly relevant in Southern Ocean ecosystems where the relationships between select predator species and Antarctic krill (Euphaus...
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ftfrontimediafig:oai:figshare.com:article/21960821 2023-05-15T13:31:04+02:00 Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx Javed Riaz Sophie Bestley Simon Wotherspoon Martin J. Cox Louise Emmerson 2023-01-26T14:30:41Z https://doi.org/10.3389/fmars.2023.1060984.s001 https://figshare.com/articles/dataset/Table_1_Spatial_link_between_Ad_lie_penguin_foraging_effort_and_krill_swarm_abundance_and_distribution_docx/21960821 unknown doi:10.3389/fmars.2023.1060984.s001 https://figshare.com/articles/dataset/Table_1_Spatial_link_between_Ad_lie_penguin_foraging_effort_and_krill_swarm_abundance_and_distribution_docx/21960821 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering foraging behaviour Pygoscelis adeliae Euphausia superba krill swarm dive behaviour predator-prey Dataset 2023 ftfrontimediafig https://doi.org/10.3389/fmars.2023.1060984.s001 2023-02-02T00:11:15Z Understanding how predator foraging behaviour is influenced by the distribution and abundance of prey is a fundamental challenge in marine foraging ecology. This is particularly relevant in Southern Ocean ecosystems where the relationships between select predator species and Antarctic krill (Euphausia superba) can inform ecosystem conservation and precautionary fisheries management. In this study, we examine the spatial associations between krill swarm characteristics and Adélie penguin (Pygoscelis adeliae) foraging effort at Béchervaise Island, a long-term monitoring site in East Antarctica. Spatially integrating two years of regional-scale krill acoustic data with contemporaneous horizontal and vertical movement information from chick-rearing adult Adélie penguins, we assessed how penguin foraging effort changed in relation to krill swarm abundance and distribution across the survey area. Our findings show that penguin diving effort was focused in areas with a high number of krill swarms, yet they did not focus their effort in areas with high krill biomass. These results suggest the spatial organisation of Adélie penguin foraging effort can provide an indication of krill presence (and/or availability) but may not reflect krill abundance. We discuss our results in the context of penguin foraging strategies, capturing single krill within the water column rather than the engulfment feeding strategy of larger marine mammals such as whales. Our work substantially improves understanding of penguin-krill dynamics in East Antarctica and provides a greater level of nuance regarding the utility of Adélie penguins as indicator species under CCAMLR’s Ecosystem Monitoring Programme (CEMP). Understanding these predator-prey linkages will become increasingly important for managing any expanding krill fisheries in the region or changes in the prey field under future climate change scenarios. Thus, our results can be interpreted alongside other ecological indicators to support management of the East Antarctic sector of the ... Dataset Antarc* Antarctic Antarctic Krill Antarctica Béchervaise Island East Antarctica Euphausia superba Pygoscelis adeliae Southern Ocean Frontiers: Figshare Antarctic Southern Ocean East Antarctica Béchervaise Island ENVELOPE(62.818,62.818,-67.591,-67.591) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering foraging behaviour Pygoscelis adeliae Euphausia superba krill swarm dive behaviour predator-prey |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering foraging behaviour Pygoscelis adeliae Euphausia superba krill swarm dive behaviour predator-prey Javed Riaz Sophie Bestley Simon Wotherspoon Martin J. Cox Louise Emmerson Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering foraging behaviour Pygoscelis adeliae Euphausia superba krill swarm dive behaviour predator-prey |
description |
Understanding how predator foraging behaviour is influenced by the distribution and abundance of prey is a fundamental challenge in marine foraging ecology. This is particularly relevant in Southern Ocean ecosystems where the relationships between select predator species and Antarctic krill (Euphausia superba) can inform ecosystem conservation and precautionary fisheries management. In this study, we examine the spatial associations between krill swarm characteristics and Adélie penguin (Pygoscelis adeliae) foraging effort at Béchervaise Island, a long-term monitoring site in East Antarctica. Spatially integrating two years of regional-scale krill acoustic data with contemporaneous horizontal and vertical movement information from chick-rearing adult Adélie penguins, we assessed how penguin foraging effort changed in relation to krill swarm abundance and distribution across the survey area. Our findings show that penguin diving effort was focused in areas with a high number of krill swarms, yet they did not focus their effort in areas with high krill biomass. These results suggest the spatial organisation of Adélie penguin foraging effort can provide an indication of krill presence (and/or availability) but may not reflect krill abundance. We discuss our results in the context of penguin foraging strategies, capturing single krill within the water column rather than the engulfment feeding strategy of larger marine mammals such as whales. Our work substantially improves understanding of penguin-krill dynamics in East Antarctica and provides a greater level of nuance regarding the utility of Adélie penguins as indicator species under CCAMLR’s Ecosystem Monitoring Programme (CEMP). Understanding these predator-prey linkages will become increasingly important for managing any expanding krill fisheries in the region or changes in the prey field under future climate change scenarios. Thus, our results can be interpreted alongside other ecological indicators to support management of the East Antarctic sector of the ... |
format |
Dataset |
author |
Javed Riaz Sophie Bestley Simon Wotherspoon Martin J. Cox Louise Emmerson |
author_facet |
Javed Riaz Sophie Bestley Simon Wotherspoon Martin J. Cox Louise Emmerson |
author_sort |
Javed Riaz |
title |
Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx |
title_short |
Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx |
title_full |
Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx |
title_fullStr |
Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx |
title_full_unstemmed |
Table_1_Spatial link between Adélie penguin foraging effort and krill swarm abundance and distribution.docx |
title_sort |
table_1_spatial link between adélie penguin foraging effort and krill swarm abundance and distribution.docx |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1060984.s001 https://figshare.com/articles/dataset/Table_1_Spatial_link_between_Ad_lie_penguin_foraging_effort_and_krill_swarm_abundance_and_distribution_docx/21960821 |
long_lat |
ENVELOPE(62.818,62.818,-67.591,-67.591) |
geographic |
Antarctic Southern Ocean East Antarctica Béchervaise Island |
geographic_facet |
Antarctic Southern Ocean East Antarctica Béchervaise Island |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Béchervaise Island East Antarctica Euphausia superba Pygoscelis adeliae Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Béchervaise Island East Antarctica Euphausia superba Pygoscelis adeliae Southern Ocean |
op_relation |
doi:10.3389/fmars.2023.1060984.s001 https://figshare.com/articles/dataset/Table_1_Spatial_link_between_Ad_lie_penguin_foraging_effort_and_krill_swarm_abundance_and_distribution_docx/21960821 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2023.1060984.s001 |
_version_ |
1766015744289538048 |