Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica)
The Antarctic silverfish (Pleuragramma antarctica) is a critically important forage species with a circumpolar distribution and is unique among other notothenioid species for its wholly pelagic life cycle. Previous studies have provided mixed evidence of population structure over regional and circum...
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ftunivpadovairis:oai:www.research.unipd.it:11577/3294290 2024-04-21T07:52:34+00:00 Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica) Caccavo, Jilda Alicia Papetti, Chiara Wetjen, Maj Knust, Rainer Ashford, Julian R. Zane, Lorenzo Caccavo, Jilda Alicia Papetti, Chiara Wetjen, Maj Knust, Rainer Ashford, Julian R. Zane, Lorenzo 2018 ELETTRONICO http://hdl.handle.net/11577/3294290 https://doi.org/10.1038/s41598-018-36030-x eng eng Nature Publishing Group info:eu-repo/semantics/altIdentifier/pmid/30552350 info:eu-repo/semantics/altIdentifier/wos/WOS:000453224400017 volume:8 issue:1 firstpage:1 lastpage:16 numberofpages:16 journal:SCIENTIFIC REPORTS http://hdl.handle.net/11577/3294290 doi:10.1038/s41598-018-36030-x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85053732600 www.nature.com/srep/index.html info:eu-repo/semantics/openAccess Multidisciplinary info:eu-repo/semantics/article 2018 ftunivpadovairis https://doi.org/10.1038/s41598-018-36030-x 2024-03-28T02:03:20Z The Antarctic silverfish (Pleuragramma antarctica) is a critically important forage species with a circumpolar distribution and is unique among other notothenioid species for its wholly pelagic life cycle. Previous studies have provided mixed evidence of population structure over regional and circumpolar scales. The aim of the present study was to test the recent population hypothesis for Antarctic silverfish, which emphasizes the interplay between life history and hydrography in shaping connectivity. A total of 1067 individuals were collected over 25 years from different locations on a circumpolar scale. Samples were genotyped at fifteen microsatellites to assess population differentiation and genetic structuring using clustering methods, F-statistics, and hierarchical analysis of variance. A lack of differentiation was found between locations connected by the Antarctic Slope Front Current (ASF), indicative of high levels of gene flow. However, gene flow was significantly reduced at the South Orkney Islands and the western Antarctic Peninsula where the ASF is absent. This pattern of gene flow emphasized the relevance of large-scale circulation as a mechanism for circumpolar connectivity. Chaotic genetic patchiness characterized population structure over time, with varying patterns of differentiation observed between years, accompanied by heterogeneous standard length distributions. The present study supports a more nuanced version of the genetic panmixia hypothesis that reflects physical-biological interactions over the life history. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic silverfish Antarctica South Orkney Islands Padua Research Archive (IRIS - Università degli Studi di Padova) Scientific Reports 8 1 |
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Open Polar |
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Padua Research Archive (IRIS - Università degli Studi di Padova) |
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ftunivpadovairis |
language |
English |
topic |
Multidisciplinary |
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Multidisciplinary Caccavo, Jilda Alicia Papetti, Chiara Wetjen, Maj Knust, Rainer Ashford, Julian R. Zane, Lorenzo Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica) |
topic_facet |
Multidisciplinary |
description |
The Antarctic silverfish (Pleuragramma antarctica) is a critically important forage species with a circumpolar distribution and is unique among other notothenioid species for its wholly pelagic life cycle. Previous studies have provided mixed evidence of population structure over regional and circumpolar scales. The aim of the present study was to test the recent population hypothesis for Antarctic silverfish, which emphasizes the interplay between life history and hydrography in shaping connectivity. A total of 1067 individuals were collected over 25 years from different locations on a circumpolar scale. Samples were genotyped at fifteen microsatellites to assess population differentiation and genetic structuring using clustering methods, F-statistics, and hierarchical analysis of variance. A lack of differentiation was found between locations connected by the Antarctic Slope Front Current (ASF), indicative of high levels of gene flow. However, gene flow was significantly reduced at the South Orkney Islands and the western Antarctic Peninsula where the ASF is absent. This pattern of gene flow emphasized the relevance of large-scale circulation as a mechanism for circumpolar connectivity. Chaotic genetic patchiness characterized population structure over time, with varying patterns of differentiation observed between years, accompanied by heterogeneous standard length distributions. The present study supports a more nuanced version of the genetic panmixia hypothesis that reflects physical-biological interactions over the life history. |
author2 |
Caccavo, Jilda Alicia Papetti, Chiara Wetjen, Maj Knust, Rainer Ashford, Julian R. Zane, Lorenzo |
format |
Article in Journal/Newspaper |
author |
Caccavo, Jilda Alicia Papetti, Chiara Wetjen, Maj Knust, Rainer Ashford, Julian R. Zane, Lorenzo |
author_facet |
Caccavo, Jilda Alicia Papetti, Chiara Wetjen, Maj Knust, Rainer Ashford, Julian R. Zane, Lorenzo |
author_sort |
Caccavo, Jilda Alicia |
title |
Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica) |
title_short |
Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica) |
title_full |
Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica) |
title_fullStr |
Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica) |
title_full_unstemmed |
Along-shelf connectivity and circumpolar gene flow in Antarctic silverfish (Pleuragramma antarctica) |
title_sort |
along-shelf connectivity and circumpolar gene flow in antarctic silverfish (pleuragramma antarctica) |
publisher |
Nature Publishing Group |
publishDate |
2018 |
url |
http://hdl.handle.net/11577/3294290 https://doi.org/10.1038/s41598-018-36030-x |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic silverfish Antarctica South Orkney Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic silverfish Antarctica South Orkney Islands |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/30552350 info:eu-repo/semantics/altIdentifier/wos/WOS:000453224400017 volume:8 issue:1 firstpage:1 lastpage:16 numberofpages:16 journal:SCIENTIFIC REPORTS http://hdl.handle.net/11577/3294290 doi:10.1038/s41598-018-36030-x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85053732600 www.nature.com/srep/index.html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-018-36030-x |
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Scientific Reports |
container_volume |
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