Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.)
In species with high migratory potential, the genetic signal revealing population differentiation is often obscured by population admixture. To our knowledge, the explicit comparison of genetic samples from known spawning and feeding areas has not been conducted for any highly migratory pelagic fish...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Online Access: | http://hdl.handle.net/10508/7274 http://hdl.handle.net/10261/322362 https://doi.org/10.1016/j.jembe.2005.06.022 |
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ftcsic:oai:digital.csic.es:10261/322362 2024-02-11T10:07:13+01:00 Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.) Alvarado-Bremer, J. Mejuto-García, Jaime Gómez-Márquez, J. Boán, F. Carpintero, P. Rodríguez, José María Viñas, J. Greig, T.W. Ely, B. 2005 http://hdl.handle.net/10508/7274 http://hdl.handle.net/10261/322362 https://doi.org/10.1016/j.jembe.2005.06.022 unknown Centro Oceanográfico de A Coruña Journal of Experimental Marine Biology and Ecology, 327. 2005: 167-182 0022-0981 http://hdl.handle.net/10508/7274 http://hdl.handle.net/10261/322362 doi:10.1016/j.jembe.2005.06.022 1254 none Centro Oceanográfico de A Coruña Pesquerías research article 2005 ftcsic https://doi.org/10.1016/j.jembe.2005.06.022 2024-01-16T11:46:54Z In species with high migratory potential, the genetic signal revealing population differentiation is often obscured by population admixture. To our knowledge, the explicit comparison of genetic samples from known spawning and feeding areas has not been conducted for any highly migratory pelagic fish species. This study examines the geographic heterogeneity of swordfish mitochondrial DNA (mtDNA) lineages within the Atlantic Ocean using 330 base pairs of sequence of the control region from 480 individuals. Hierarchical analyses of sequence variation were conducted to test whether samples from areas identified as the corresponding spawning and feeding grounds for the northwest (NW) Atlantic (Caribbean and Georges Banks-US northeast) and the South Atlantic (Brazil-Uruguay and Gulf of Guinea), were more closely related to each other than to samples from any other region, including the Mediterranean Sea, the Indian Ocean, and the Pacific Ocean. Phylogeographic analyses reveal that swordfish mtDNA phylogeny is characterized by incomplete lineage sorting and secondary contact of two highly divergent clades. However, despite this complex phylogenetic signature, results from an analysis of nucleotide diversity and from an analysis of molecular variance (AMOVA) were for the most part concordant and indicate that NW Atlantic and South Atlantic swordfish belong to separate populations. The mtDNA distinctiveness of NW Atlantic and South Atlantic swordfish populations is indicative of philopatric behavior in swordfish towards breeding and feeding areas. Sí Article in Journal/Newspaper Northwest Atlantic Digital.CSIC (Spanish National Research Council) Indian Pacific Uruguay Journal of Experimental Marine Biology and Ecology 327 2 167 182 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Centro Oceanográfico de A Coruña Pesquerías |
spellingShingle |
Centro Oceanográfico de A Coruña Pesquerías Alvarado-Bremer, J. Mejuto-García, Jaime Gómez-Márquez, J. Boán, F. Carpintero, P. Rodríguez, José María Viñas, J. Greig, T.W. Ely, B. Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.) |
topic_facet |
Centro Oceanográfico de A Coruña Pesquerías |
description |
In species with high migratory potential, the genetic signal revealing population differentiation is often obscured by population admixture. To our knowledge, the explicit comparison of genetic samples from known spawning and feeding areas has not been conducted for any highly migratory pelagic fish species. This study examines the geographic heterogeneity of swordfish mitochondrial DNA (mtDNA) lineages within the Atlantic Ocean using 330 base pairs of sequence of the control region from 480 individuals. Hierarchical analyses of sequence variation were conducted to test whether samples from areas identified as the corresponding spawning and feeding grounds for the northwest (NW) Atlantic (Caribbean and Georges Banks-US northeast) and the South Atlantic (Brazil-Uruguay and Gulf of Guinea), were more closely related to each other than to samples from any other region, including the Mediterranean Sea, the Indian Ocean, and the Pacific Ocean. Phylogeographic analyses reveal that swordfish mtDNA phylogeny is characterized by incomplete lineage sorting and secondary contact of two highly divergent clades. However, despite this complex phylogenetic signature, results from an analysis of nucleotide diversity and from an analysis of molecular variance (AMOVA) were for the most part concordant and indicate that NW Atlantic and South Atlantic swordfish belong to separate populations. The mtDNA distinctiveness of NW Atlantic and South Atlantic swordfish populations is indicative of philopatric behavior in swordfish towards breeding and feeding areas. Sí |
format |
Article in Journal/Newspaper |
author |
Alvarado-Bremer, J. Mejuto-García, Jaime Gómez-Márquez, J. Boán, F. Carpintero, P. Rodríguez, José María Viñas, J. Greig, T.W. Ely, B. |
author_facet |
Alvarado-Bremer, J. Mejuto-García, Jaime Gómez-Márquez, J. Boán, F. Carpintero, P. Rodríguez, José María Viñas, J. Greig, T.W. Ely, B. |
author_sort |
Alvarado-Bremer, J. |
title |
Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.) |
title_short |
Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.) |
title_full |
Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.) |
title_fullStr |
Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.) |
title_full_unstemmed |
Hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest Atlantic and South Atlantic populationsof swordfish (Xiphias gladius L.) |
title_sort |
hierarchical analyses of genetic variation of samples from breeding and feeding grounds confirm the genetic partitioning of northwest atlantic and south atlantic populationsof swordfish (xiphias gladius l.) |
publishDate |
2005 |
url |
http://hdl.handle.net/10508/7274 http://hdl.handle.net/10261/322362 https://doi.org/10.1016/j.jembe.2005.06.022 |
geographic |
Indian Pacific Uruguay |
geographic_facet |
Indian Pacific Uruguay |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_relation |
Centro Oceanográfico de A Coruña Journal of Experimental Marine Biology and Ecology, 327. 2005: 167-182 0022-0981 http://hdl.handle.net/10508/7274 http://hdl.handle.net/10261/322362 doi:10.1016/j.jembe.2005.06.022 1254 |
op_rights |
none |
op_doi |
https://doi.org/10.1016/j.jembe.2005.06.022 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
327 |
container_issue |
2 |
container_start_page |
167 |
op_container_end_page |
182 |
_version_ |
1790605404744450048 |