Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea
A multi-disciplinary approach was employed to examine a physical-biological population hypothesis for a critical forage species, the Antarctic silverfish Pleuragramma antarctica. Caccavo et al. (2018; Sci Rep 8:17856) had shown strong gene flow along the westward Antarctic Slope Current, in addition...
Published in: | Marine Ecology Progress Series |
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ODU Digital Commons
2019
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Online Access: | https://digitalcommons.odu.edu/oeas_fac_pubs/366 https://doi.org/10.3354/meps13017 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1378/viewcontent/Ashford_2019_SpatialStructuringandLifeHistoryConnectivityOCR.pdf |
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1378 2023-12-10T09:41:15+01:00 Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea Caccavo, Jilda Alicia Ashford, Julian R. Ryan, Svenja Papetti, Chiara Schröder, Michael Zane, Lorenzo 2019-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/366 https://doi.org/10.3354/meps13017 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1378/viewcontent/Ashford_2019_SpatialStructuringandLifeHistoryConnectivityOCR.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/366 doi:10.3354/meps13017 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1378/viewcontent/Ashford_2019_SpatialStructuringandLifeHistoryConnectivityOCR.pdf © The authors 2019 Published under an Attribution 4.0 International License . Use, distribution and reproduction are un - restricted. Authors and original publication must be credited. Publisher: Inter-Research OES Faculty Publications Physical-biological interactions Filchner Trough Population structure Life history connectivity Trough circulation Modified Warm Deep Water MWDW Ice shelf water ISW Otolith chemistry Terra-Nova bay Trace element analysis Pleuragramma antarcticum Water masses Stock Identification Ice shelf Ross Sea Fish Ecology and Evolutionary Biology Environmental Sciences Marine Biology Oceanography article 2019 ftolddominionuni https://doi.org/10.3354/meps13017 2023-11-13T19:09:43Z A multi-disciplinary approach was employed to examine a physical-biological population hypothesis for a critical forage species, the Antarctic silverfish Pleuragramma antarctica. Caccavo et al. (2018; Sci Rep 8:17856) had shown strong gene flow along the westward Antarctic Slope Current, in addition to spatially recurring length modes that provided evidence for episodic connectivity. In this paper, otolith nucleus chemistry from a subset of fish collected in the southern Weddell Sea as part of a hydrographic survey of the Filchner Trough system was used to test between connectivity scenarios. Nucleus chemistry, which reflects environmental exposure during early life, showed significant spatial structuring despite homogeneity in microsatellite allele frequencies. Mg:Ca and Sr:Ca differentiated length modes, and Mg:Ca showed significant contrasts between Atka Bay, Halley Bay, and Filchner Trough. Physical-biological mechanisms may help reconcile structuring shown by otolith chemistry, length, and abundance data with prior evidence of gene flow. Such mechanisms include self-recruitment shaped by circulation associated with the Filchner Trough, fluctuations in mixing between immigrant and locally recruited fish, and feeding opportunities between inflowing Modified Warm Deep Water and outflowing Ice Shelf Water. The results illustrate how comparisons between multi-disciplinary techniques based on integrated sampling designs that incorporate hydrography can enhance understanding of population structure and connectivity around the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic silverfish Antarctica Ice Shelf Ross Sea Southern Ocean Weddell Sea Old Dominion University: ODU Digital Commons Antarctic Southern Ocean The Antarctic Weddell Sea Ross Sea Terra Nova Bay Weddell Atka ENVELOPE(151.789,151.789,60.835,60.835) Filchner Trough ENVELOPE(-36.000,-36.000,-77.000,-77.000) Marine Ecology Progress Series 624 195 212 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Physical-biological interactions Filchner Trough Population structure Life history connectivity Trough circulation Modified Warm Deep Water MWDW Ice shelf water ISW Otolith chemistry Terra-Nova bay Trace element analysis Pleuragramma antarcticum Water masses Stock Identification Ice shelf Ross Sea Fish Ecology and Evolutionary Biology Environmental Sciences Marine Biology Oceanography |
spellingShingle |
Physical-biological interactions Filchner Trough Population structure Life history connectivity Trough circulation Modified Warm Deep Water MWDW Ice shelf water ISW Otolith chemistry Terra-Nova bay Trace element analysis Pleuragramma antarcticum Water masses Stock Identification Ice shelf Ross Sea Fish Ecology and Evolutionary Biology Environmental Sciences Marine Biology Oceanography Caccavo, Jilda Alicia Ashford, Julian R. Ryan, Svenja Papetti, Chiara Schröder, Michael Zane, Lorenzo Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea |
topic_facet |
Physical-biological interactions Filchner Trough Population structure Life history connectivity Trough circulation Modified Warm Deep Water MWDW Ice shelf water ISW Otolith chemistry Terra-Nova bay Trace element analysis Pleuragramma antarcticum Water masses Stock Identification Ice shelf Ross Sea Fish Ecology and Evolutionary Biology Environmental Sciences Marine Biology Oceanography |
description |
A multi-disciplinary approach was employed to examine a physical-biological population hypothesis for a critical forage species, the Antarctic silverfish Pleuragramma antarctica. Caccavo et al. (2018; Sci Rep 8:17856) had shown strong gene flow along the westward Antarctic Slope Current, in addition to spatially recurring length modes that provided evidence for episodic connectivity. In this paper, otolith nucleus chemistry from a subset of fish collected in the southern Weddell Sea as part of a hydrographic survey of the Filchner Trough system was used to test between connectivity scenarios. Nucleus chemistry, which reflects environmental exposure during early life, showed significant spatial structuring despite homogeneity in microsatellite allele frequencies. Mg:Ca and Sr:Ca differentiated length modes, and Mg:Ca showed significant contrasts between Atka Bay, Halley Bay, and Filchner Trough. Physical-biological mechanisms may help reconcile structuring shown by otolith chemistry, length, and abundance data with prior evidence of gene flow. Such mechanisms include self-recruitment shaped by circulation associated with the Filchner Trough, fluctuations in mixing between immigrant and locally recruited fish, and feeding opportunities between inflowing Modified Warm Deep Water and outflowing Ice Shelf Water. The results illustrate how comparisons between multi-disciplinary techniques based on integrated sampling designs that incorporate hydrography can enhance understanding of population structure and connectivity around the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Caccavo, Jilda Alicia Ashford, Julian R. Ryan, Svenja Papetti, Chiara Schröder, Michael Zane, Lorenzo |
author_facet |
Caccavo, Jilda Alicia Ashford, Julian R. Ryan, Svenja Papetti, Chiara Schröder, Michael Zane, Lorenzo |
author_sort |
Caccavo, Jilda Alicia |
title |
Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea |
title_short |
Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea |
title_full |
Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea |
title_fullStr |
Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea |
title_full_unstemmed |
Spatial Structuring and Life History Connectivity of Antarctic Silverfish Along the Southern Continental Shelf of the Weddell Sea |
title_sort |
spatial structuring and life history connectivity of antarctic silverfish along the southern continental shelf of the weddell sea |
publisher |
ODU Digital Commons |
publishDate |
2019 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/366 https://doi.org/10.3354/meps13017 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1378/viewcontent/Ashford_2019_SpatialStructuringandLifeHistoryConnectivityOCR.pdf |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-36.000,-36.000,-77.000,-77.000) |
geographic |
Antarctic Southern Ocean The Antarctic Weddell Sea Ross Sea Terra Nova Bay Weddell Atka Filchner Trough |
geographic_facet |
Antarctic Southern Ocean The Antarctic Weddell Sea Ross Sea Terra Nova Bay Weddell Atka Filchner Trough |
genre |
Antarc* Antarctic Antarctic silverfish Antarctica Ice Shelf Ross Sea Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic silverfish Antarctica Ice Shelf Ross Sea Southern Ocean Weddell Sea |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/366 doi:10.3354/meps13017 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1378/viewcontent/Ashford_2019_SpatialStructuringandLifeHistoryConnectivityOCR.pdf |
op_rights |
© The authors 2019 Published under an Attribution 4.0 International License . Use, distribution and reproduction are un - restricted. Authors and original publication must be credited. Publisher: Inter-Research |
op_doi |
https://doi.org/10.3354/meps13017 |
container_title |
Marine Ecology Progress Series |
container_volume |
624 |
container_start_page |
195 |
op_container_end_page |
212 |
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1784900248437522432 |