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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ftpubmed:oai:pubmedcentral.nih.gov:10523065 2023-10-29T02:32:23+01:00 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 2023-09-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10523065/ https://doi.org/10.1098/rsos.230520 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10523065/ http://dx.doi.org/10.1098/rsos.230520 © 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. R Soc Open Sci Ecology Conservation and Global Change Biology Text 2023 ftpubmed https://doi.org/10.1098/rsos.230520 2023-10-01T00:58:02Z 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. Text Antarc* Antarctic Antarctic Krill Southern Ocean PubMed Central (PMC) Royal Society Open Science 10 9 |
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English |
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Ecology Conservation and Global Change Biology |
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Ecology Conservation and Global Change Biology 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 |
Ecology Conservation and Global Change Biology |
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 |
Text |
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 |
The Royal Society |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10523065/ https://doi.org/10.1098/rsos.230520 |
genre |
Antarc* Antarctic Antarctic Krill Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Southern Ocean |
op_source |
R Soc Open Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10523065/ http://dx.doi.org/10.1098/rsos.230520 |
op_rights |
© 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
op_doi |
https://doi.org/10.1098/rsos.230520 |
container_title |
Royal Society Open Science |
container_volume |
10 |
container_issue |
9 |
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1781053746055217152 |