Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.)
Previous genetic studies of Atlantic swordfish (Xiphias gladius L.) revealed significant differentiation among Mediterranean, North Atlantic and South Atlantic populations using both mitochondrial and nuclear DNA data. However, limitations in geographic sampling coverage, and the use of single loci,...
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ftcsic:oai:digital.csic.es:10261/322454 2024-02-11T10:06:12+01:00 Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.) Smith, B.L. Lu, Ching-Ping García-Cortés, Blanca Viñas, Jordi Yeh, Shean-Ya Alvarado Bremer, J. R. Atlantic Ocean 1991-2006 2015-06-09 http://hdl.handle.net/10508/9251 http://hdl.handle.net/10261/322454 https://doi.org/10.1371/journal.pone.0127979.g006 en eng Centro Oceanográfico de A Coruña AM PLoS ONE, 10(6). 2015: 1-30 1932-6203 http://hdl.handle.net/10508/9251 http://hdl.handle.net/10261/322454 doi:10.1371/journal.pone.0127979.g006 20957 open Pesquerías Centro Oceanográfico de A Coruña genetic research article 2015 ftcsic https://doi.org/10.1371/journal.pone.0127979.g006 2024-01-16T11:46:54Z Previous genetic studies of Atlantic swordfish (Xiphias gladius L.) revealed significant differentiation among Mediterranean, North Atlantic and South Atlantic populations using both mitochondrial and nuclear DNA data. However, limitations in geographic sampling coverage, and the use of single loci, precluded an accurate placement of boundaries and of estimates of admixture. In this study, we present multilocus analyses of 26 single nucleotide polymorphisms (SNPs) within 10 nuclear genes to estimate population differentiation and admixture based on the characterization of 774 individuals representing North Atlantic, South Atlantic, and Mediterranean swordfish populations. Pairwise FST values, AMOVA, PCoA, and Bayesian individual assignments support the differentiation of swordfish inhabiting these three basins, but not the current placement of the boundaries that separate them. Specifically, the range of the South Atlantic population extends beyond 5°N management boundary to 20°N-25°N from 45°W. Likewise the Mediterranean population extends beyond the current management boundary at the Strait of Gibraltar to approximately 10°W. Further, admixture zones, characterized by asymmetric contributions of adjacent populations within samples, are confined to the Northeast Atlantic. While South Atlantic and Mediterranean migrants were identified within these Northeast Atlantic admixture zones no North Atlantic migrants were identified respectively in these two neighboring basins. Owing to both, the characterization of larger number of loci and a more ample spatial sampling coverage, it was possible to provide a finer resolution of the boundaries separating Atlantic swordfish populations than previous studies. Finally, the patterns of population structure and admixture are discussed in the light of the reproductive biology, the known patterns of dispersal, and oceanographic features that may act as barriers to gene flow to Atlantic swordfish. SI Article in Journal/Newspaper North Atlantic Northeast Atlantic Digital.CSIC (Spanish National Research Council) |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Pesquerías Centro Oceanográfico de A Coruña genetic |
spellingShingle |
Pesquerías Centro Oceanográfico de A Coruña genetic Smith, B.L. Lu, Ching-Ping García-Cortés, Blanca Viñas, Jordi Yeh, Shean-Ya Alvarado Bremer, J. R. Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.) |
topic_facet |
Pesquerías Centro Oceanográfico de A Coruña genetic |
description |
Previous genetic studies of Atlantic swordfish (Xiphias gladius L.) revealed significant differentiation among Mediterranean, North Atlantic and South Atlantic populations using both mitochondrial and nuclear DNA data. However, limitations in geographic sampling coverage, and the use of single loci, precluded an accurate placement of boundaries and of estimates of admixture. In this study, we present multilocus analyses of 26 single nucleotide polymorphisms (SNPs) within 10 nuclear genes to estimate population differentiation and admixture based on the characterization of 774 individuals representing North Atlantic, South Atlantic, and Mediterranean swordfish populations. Pairwise FST values, AMOVA, PCoA, and Bayesian individual assignments support the differentiation of swordfish inhabiting these three basins, but not the current placement of the boundaries that separate them. Specifically, the range of the South Atlantic population extends beyond 5°N management boundary to 20°N-25°N from 45°W. Likewise the Mediterranean population extends beyond the current management boundary at the Strait of Gibraltar to approximately 10°W. Further, admixture zones, characterized by asymmetric contributions of adjacent populations within samples, are confined to the Northeast Atlantic. While South Atlantic and Mediterranean migrants were identified within these Northeast Atlantic admixture zones no North Atlantic migrants were identified respectively in these two neighboring basins. Owing to both, the characterization of larger number of loci and a more ample spatial sampling coverage, it was possible to provide a finer resolution of the boundaries separating Atlantic swordfish populations than previous studies. Finally, the patterns of population structure and admixture are discussed in the light of the reproductive biology, the known patterns of dispersal, and oceanographic features that may act as barriers to gene flow to Atlantic swordfish. SI |
format |
Article in Journal/Newspaper |
author |
Smith, B.L. Lu, Ching-Ping García-Cortés, Blanca Viñas, Jordi Yeh, Shean-Ya Alvarado Bremer, J. R. |
author_facet |
Smith, B.L. Lu, Ching-Ping García-Cortés, Blanca Viñas, Jordi Yeh, Shean-Ya Alvarado Bremer, J. R. |
author_sort |
Smith, B.L. |
title |
Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.) |
title_short |
Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.) |
title_full |
Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.) |
title_fullStr |
Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.) |
title_full_unstemmed |
Multilocus Bayesian Estimates Oceanic Genetic Differentiation, Connectivity, and Admixture in Swordfish (Xiphias gladius L.) |
title_sort |
multilocus bayesian estimates oceanic genetic differentiation, connectivity, and admixture in swordfish (xiphias gladius l.) |
publishDate |
2015 |
url |
http://hdl.handle.net/10508/9251 http://hdl.handle.net/10261/322454 https://doi.org/10.1371/journal.pone.0127979.g006 |
op_coverage |
Atlantic Ocean 1991-2006 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_relation |
Centro Oceanográfico de A Coruña AM PLoS ONE, 10(6). 2015: 1-30 1932-6203 http://hdl.handle.net/10508/9251 http://hdl.handle.net/10261/322454 doi:10.1371/journal.pone.0127979.g006 20957 |
op_rights |
open |
op_doi |
https://doi.org/10.1371/journal.pone.0127979.g006 |
_version_ |
1790603768542265344 |