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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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10523065/ https://www.ncbi.nlm.nih.gov/pubmed/37771962 http://dx.doi.org/10.1098/rsos.230520 |
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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 |
collection | PubMed |
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 | Online Article Text |
id | pubmed-10523065 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-105230652023-09-28 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 R Soc Open Sci Ecology, Conservation and Global Change Biology 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. The Royal Society 2023-09-27 /pmc/articles/PMC10523065/ /pubmed/37771962 http://dx.doi.org/10.1098/rsos.230520 Text en © 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. |
spellingShingle | 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 |
title | 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_short | 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 |
topic | Ecology, Conservation and Global Change Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10523065/ https://www.ncbi.nlm.nih.gov/pubmed/37771962 http://dx.doi.org/10.1098/rsos.230520 |
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