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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Royal Society Publishing
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fttudresden:oai:qucosa:de:qucosa:93135 2024-09-30T14:27:11+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 2023 https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-931353 https://tud.qucosa.de/id/qucosa%3A93135 https://tud.qucosa.de/api/qucosa%3A93135/attachment/ATT-0/ eng eng Royal Society Publishing 2054-5703 230520 10.1098/rsos.230520 info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/SPP 1158: Bereich Infrastruktur - Antarktisforschung mit vergleichenden Untersuchungen in arktischen Eisgebieten/FO 207/17-1/ urn:nbn:de:bsz:14-qucosa2-931353 https://tud.qucosa.de/id/qucosa%3A93135 https://tud.qucosa.de/api/qucosa%3A93135/attachment/ATT-0/ info:eu-repo/semantics/openAccess Antarctic krill vertical migration behaviour seasonal vertical migration antarktischer Krill vertikales Wanderverhalten saisonale Vertikalwanderung info:eu-repo/classification/ddc/500 ddc:500 info:eu-repo/classification/ddc/600 ddc:600 info:eu-repo/semantics/publishedVersion doc-type:article info:eu-repo/semantics/article doc-type:Text 2023 fttudresden 2024-09-18T00:09:44Z 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 Antarktis* Southern Ocean Dresden University of Technology: Qucosa Antarctic Southern Ocean |
institution |
Open Polar |
collection |
Dresden University of Technology: Qucosa |
op_collection_id |
fttudresden |
language |
English |
topic |
Antarctic krill vertical migration behaviour seasonal vertical migration antarktischer Krill vertikales Wanderverhalten saisonale Vertikalwanderung info:eu-repo/classification/ddc/500 ddc:500 info:eu-repo/classification/ddc/600 ddc:600 |
spellingShingle |
Antarctic krill vertical migration behaviour seasonal vertical migration antarktischer Krill vertikales Wanderverhalten saisonale Vertikalwanderung info:eu-repo/classification/ddc/500 ddc:500 info:eu-repo/classification/ddc/600 ddc:600 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 |
topic_facet |
Antarctic krill vertical migration behaviour seasonal vertical migration antarktischer Krill vertikales Wanderverhalten saisonale Vertikalwanderung info:eu-repo/classification/ddc/500 ddc:500 info:eu-repo/classification/ddc/600 ddc:600 |
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. |
format |
Article in Journal/Newspaper |
author |
Bahlburg, Dominik Hüppe, Lukas Böhrer, Thomas Thorpe, Sally E. Murphy, Eugene J. Berger, Uta Meyer, Bettina |
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 |
Royal Society Publishing |
publishDate |
2023 |
url |
https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-931353 https://tud.qucosa.de/id/qucosa%3A93135 https://tud.qucosa.de/api/qucosa%3A93135/attachment/ATT-0/ |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Antarktis* Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarktis* Southern Ocean |
op_relation |
2054-5703 230520 10.1098/rsos.230520 info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/SPP 1158: Bereich Infrastruktur - Antarktisforschung mit vergleichenden Untersuchungen in arktischen Eisgebieten/FO 207/17-1/ urn:nbn:de:bsz:14-qucosa2-931353 https://tud.qucosa.de/id/qucosa%3A93135 https://tud.qucosa.de/api/qucosa%3A93135/attachment/ATT-0/ |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1811633333207040000 |