Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels
Understanding the vertical migration behaviour of Antarctic krill is important for understanding spatial distribution, ecophysiology, trophic interactions and carbon fluxes of this Southern Ocean key species. In this study, we analysed an eight-month continuous dataset recorded with an ES80 echosoun...
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Online Access: | http://dx.doi.org/10.1098/rsos.230520 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.230520 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.230520 |
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crroyalsociety:10.1098/rsos.230520 2024-10-13T14:03:13+00:00 Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels Bahlburg, Dominik Hüppe, Lukas Böhrer, Thomas Thorpe, Sally E. Murphy, Eugene J. Berger, Uta Meyer, Bettina TU Dresden and German Research Foundation joint publication funds for Open Access Publishing 2023 http://dx.doi.org/10.1098/rsos.230520 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.230520 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.230520 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Royal Society Open Science volume 10, issue 9 ISSN 2054-5703 journal-article 2023 crroyalsociety https://doi.org/10.1098/rsos.230520 2024-09-17T04:34:51Z Understanding the vertical migration behaviour of Antarctic krill is important for understanding spatial distribution, ecophysiology, trophic interactions and carbon fluxes of this Southern Ocean key species. In this study, we analysed an eight-month continuous dataset recorded with an ES80 echosounder on board a commercial krill fishing vessel in the southwest Atlantic sector of the Southern Ocean. Our analysis supports the existing hypothesis that krill swarms migrate into deeper waters during winter but also reveals a high degree of variability in vertical migration behaviour within seasons, even at small spatial scales. During summer, we found that behaviour associated with prolonged surface presence primarily occurred at low surface chlorophyll a concentrations whereas multiple ascent–descent cycles per day occurred when surface chlorophyll a concentrations were elevated. The high plasticity, with some krill swarms behaving differently in the same location at the same time, suggests that krill behaviour is not a purely environmentally driven process. Differences in life stage, physiology and type of predator are likely other important drivers. Finally, our study demonstrates new ways of using data from krill fishing vessels, and with the routine collection of additional information in potential future projects, they have great potential to significantly advance our understanding of krill ecology. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Southern Ocean The Royal Society Antarctic Southern Ocean Royal Society Open Science 10 9 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Understanding the vertical migration behaviour of Antarctic krill is important for understanding spatial distribution, ecophysiology, trophic interactions and carbon fluxes of this Southern Ocean key species. In this study, we analysed an eight-month continuous dataset recorded with an ES80 echosounder on board a commercial krill fishing vessel in the southwest Atlantic sector of the Southern Ocean. Our analysis supports the existing hypothesis that krill swarms migrate into deeper waters during winter but also reveals a high degree of variability in vertical migration behaviour within seasons, even at small spatial scales. During summer, we found that behaviour associated with prolonged surface presence primarily occurred at low surface chlorophyll a concentrations whereas multiple ascent–descent cycles per day occurred when surface chlorophyll a concentrations were elevated. The high plasticity, with some krill swarms behaving differently in the same location at the same time, suggests that krill behaviour is not a purely environmentally driven process. Differences in life stage, physiology and type of predator are likely other important drivers. Finally, our study demonstrates new ways of using data from krill fishing vessels, and with the routine collection of additional information in potential future projects, they have great potential to significantly advance our understanding of krill ecology. |
author2 |
TU Dresden and German Research Foundation joint publication funds for Open Access Publishing |
format |
Article in Journal/Newspaper |
author |
Bahlburg, Dominik Hüppe, Lukas Böhrer, Thomas Thorpe, Sally E. Murphy, Eugene J. Berger, Uta Meyer, Bettina |
spellingShingle |
Bahlburg, Dominik Hüppe, Lukas Böhrer, Thomas Thorpe, Sally E. Murphy, Eugene J. Berger, Uta Meyer, Bettina Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels |
author_facet |
Bahlburg, Dominik Hüppe, Lukas Böhrer, Thomas Thorpe, Sally E. Murphy, Eugene J. Berger, Uta Meyer, Bettina |
author_sort |
Bahlburg, Dominik |
title |
Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels |
title_short |
Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels |
title_full |
Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels |
title_fullStr |
Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels |
title_full_unstemmed |
Plasticity and seasonality of the vertical migration behaviour of Antarctic krill using acoustic data from fishing vessels |
title_sort |
plasticity and seasonality of the vertical migration behaviour of antarctic krill using acoustic data from fishing vessels |
publisher |
The Royal Society |
publishDate |
2023 |
url |
http://dx.doi.org/10.1098/rsos.230520 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.230520 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.230520 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Southern Ocean |
op_source |
Royal Society Open Science volume 10, issue 9 ISSN 2054-5703 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsos.230520 |
container_title |
Royal Society Open Science |
container_volume |
10 |
container_issue |
9 |
_version_ |
1812819638205022208 |