Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current
Large submarine plateaus impede the eastward flow of the deep‐reaching Antarctic Circumpolar Current (ACC), and at the southern Kerguelen Plateau (SKP), the ACC flow is steered north through the Fawn Trough and south through the Princess Elizabeth Trough. During the Kerguelen Axis study, a regional‐...
Published in: | Limnology and Oceanography |
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Language: | English |
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Amer Soc Limnology Oceanography
2020
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Online Access: | https://eprints.utas.edu.au/35194/ https://eprints.utas.edu.au/35194/1/141562%20-%20Otolith%20chemistry%20of%20Electrona%20antarctica%20suggests%20a%20potential%20population%20marker_OA.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:35194 2023-05-15T13:42:39+02:00 Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current Duan, M Ashford, JR Bestley, S Wei, X Walters, A Zhu, G 2020 application/pdf https://eprints.utas.edu.au/35194/ https://eprints.utas.edu.au/35194/1/141562%20-%20Otolith%20chemistry%20of%20Electrona%20antarctica%20suggests%20a%20potential%20population%20marker_OA.pdf en eng Amer Soc Limnology Oceanography https://eprints.utas.edu.au/35194/1/141562%20-%20Otolith%20chemistry%20of%20Electrona%20antarctica%20suggests%20a%20potential%20population%20marker_OA.pdf Duan, M, Ashford, JR, Bestley, S orcid:0000-0001-9342-669X , Wei, X, Walters, A orcid:0000-0002-7166-5689 and Zhu, G 2020 , 'Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current' , Limnology and Oceanography , doi:10.1002/lno.11612 <http://dx.doi.org/10.1002/lno.11612>. Southern Ocean Kerguelen Plateau mesopelagic myctophids fish trawl otolith chemistry Antarctic Circumpolar Current population connectivity Article PeerReviewed 2020 ftunivtasmania https://doi.org/10.1002/lno.11612 2021-10-11T22:16:31Z Large submarine plateaus impede the eastward flow of the deep‐reaching Antarctic Circumpolar Current (ACC), and at the southern Kerguelen Plateau (SKP), the ACC flow is steered north through the Fawn Trough and south through the Princess Elizabeth Trough. During the Kerguelen Axis study, a regional‐scale ecosystem survey, oceanographic sampling showed the ACC water properties west of the SKP to be distinct from those over the SKP. Electrona antarctica, a dominant mesopelagic fish species, is associated with Circumpolar Deep Water transported by the ACC, and modified versions that occur over and downstream from the SKP including along the Antarctic continental slope. Here, otolith chemistry from samples of E. antarctica collected during the survey were used to test a biophysical hypothesis predicting structuring and movement between populations along zonal flow in the ACC. In chemistry deposited during early life in the otolith nuclei, the relationship between MgCa−1 and SrCa−1 showed complete separation between fish collected over the SKP and within the ACC proper, indicating population differentiation. Chemistry from the otolith edges, deposited during the period leading up to capture, showed significantly higher concentrations of MgCa−1 over the SKP, likely related to differences in feeding and reproduction. Fish with nucleus chemistry characteristic of the SKP were also found in samples caught further east, suggesting they were transported along the ACC downstream, and southward toward the Antarctic continent within the Australian–Antarctic Gyre. Article in Journal/Newspaper Antarc* Antarctic Antarctica E. Antarctica Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean The Antarctic Kerguelen Princess Elizabeth Trough ENVELOPE(83.000,83.000,-64.167,-64.167) Fawn Trough ENVELOPE(75.500,75.500,-57.750,-57.750) Limnology and Oceanography 66 2 405 421 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Southern Ocean Kerguelen Plateau mesopelagic myctophids fish trawl otolith chemistry Antarctic Circumpolar Current population connectivity |
spellingShingle |
Southern Ocean Kerguelen Plateau mesopelagic myctophids fish trawl otolith chemistry Antarctic Circumpolar Current population connectivity Duan, M Ashford, JR Bestley, S Wei, X Walters, A Zhu, G Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current |
topic_facet |
Southern Ocean Kerguelen Plateau mesopelagic myctophids fish trawl otolith chemistry Antarctic Circumpolar Current population connectivity |
description |
Large submarine plateaus impede the eastward flow of the deep‐reaching Antarctic Circumpolar Current (ACC), and at the southern Kerguelen Plateau (SKP), the ACC flow is steered north through the Fawn Trough and south through the Princess Elizabeth Trough. During the Kerguelen Axis study, a regional‐scale ecosystem survey, oceanographic sampling showed the ACC water properties west of the SKP to be distinct from those over the SKP. Electrona antarctica, a dominant mesopelagic fish species, is associated with Circumpolar Deep Water transported by the ACC, and modified versions that occur over and downstream from the SKP including along the Antarctic continental slope. Here, otolith chemistry from samples of E. antarctica collected during the survey were used to test a biophysical hypothesis predicting structuring and movement between populations along zonal flow in the ACC. In chemistry deposited during early life in the otolith nuclei, the relationship between MgCa−1 and SrCa−1 showed complete separation between fish collected over the SKP and within the ACC proper, indicating population differentiation. Chemistry from the otolith edges, deposited during the period leading up to capture, showed significantly higher concentrations of MgCa−1 over the SKP, likely related to differences in feeding and reproduction. Fish with nucleus chemistry characteristic of the SKP were also found in samples caught further east, suggesting they were transported along the ACC downstream, and southward toward the Antarctic continent within the Australian–Antarctic Gyre. |
format |
Article in Journal/Newspaper |
author |
Duan, M Ashford, JR Bestley, S Wei, X Walters, A Zhu, G |
author_facet |
Duan, M Ashford, JR Bestley, S Wei, X Walters, A Zhu, G |
author_sort |
Duan, M |
title |
Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current |
title_short |
Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current |
title_full |
Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current |
title_fullStr |
Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current |
title_full_unstemmed |
Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current |
title_sort |
otolith chemistry of electrona antarctica suggests a potential population marker distinguishing the southern kerguelen plateau from the eastward-flowing antarctic circumpolar current |
publisher |
Amer Soc Limnology Oceanography |
publishDate |
2020 |
url |
https://eprints.utas.edu.au/35194/ https://eprints.utas.edu.au/35194/1/141562%20-%20Otolith%20chemistry%20of%20Electrona%20antarctica%20suggests%20a%20potential%20population%20marker_OA.pdf |
long_lat |
ENVELOPE(83.000,83.000,-64.167,-64.167) ENVELOPE(75.500,75.500,-57.750,-57.750) |
geographic |
Antarctic Southern Ocean The Antarctic Kerguelen Princess Elizabeth Trough Fawn Trough |
geographic_facet |
Antarctic Southern Ocean The Antarctic Kerguelen Princess Elizabeth Trough Fawn Trough |
genre |
Antarc* Antarctic Antarctica E. Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica E. Antarctica Southern Ocean |
op_relation |
https://eprints.utas.edu.au/35194/1/141562%20-%20Otolith%20chemistry%20of%20Electrona%20antarctica%20suggests%20a%20potential%20population%20marker_OA.pdf Duan, M, Ashford, JR, Bestley, S orcid:0000-0001-9342-669X , Wei, X, Walters, A orcid:0000-0002-7166-5689 and Zhu, G 2020 , 'Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward-flowing Antarctic Circumpolar Current' , Limnology and Oceanography , doi:10.1002/lno.11612 <http://dx.doi.org/10.1002/lno.11612>. |
op_doi |
https://doi.org/10.1002/lno.11612 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
2 |
container_start_page |
405 |
op_container_end_page |
421 |
_version_ |
1766170597324226560 |