Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia
Abstract The burbot, Lota lota , is the only freshwater species of the codfish family and has a Holarctic distribution. Pleistocene glaciations caused significant geographical differentiation in the past, but its life history characterized by winter spawning migrations over large distances is likely...
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crwiley:10.1111/j.1365-294x.2006.03045.x 2024-06-02T08:04:39+00:00 Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia BARLUENGA, MARTA SANETRA, MATTHIAS MEYER, AXEL 2006 http://dx.doi.org/10.1111/j.1365-294x.2006.03045.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2006.03045.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2006.03045.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 15, issue 12, page 3583-3600 ISSN 0962-1083 1365-294X journal-article 2006 crwiley https://doi.org/10.1111/j.1365-294x.2006.03045.x 2024-05-03T11:30:01Z Abstract The burbot, Lota lota , is the only freshwater species of the codfish family and has a Holarctic distribution. Pleistocene glaciations caused significant geographical differentiation in the past, but its life history characterized by winter spawning migrations over large distances is likely to homogenize populations by contemporary gene flow. We investigated the population genetic structure of 541 burbots from Lake Constance and adjacent Rhine and Danube tributaries in Europe using the entire mitochondrial DNA (mtDNA) control region and 11 microsatellites. Microsatellites revealed considerable population divergence ( F ST = 0.26) and evidenced recent bottlenecks in two Central European rivers. In accordance to previous evidence two main phylogeographic lineages (Atlantic and Danubian) were found co‐occurring at similar frequencies in Lake Constance, where they currently undergo random mating as indicated by microsatellites. The Danubian lineage contributed only a small proportion to the lake's mtDNA diversity, and probably expanded within the lake shortly after its formation ∼10 000–15 000 bp . The larger Atlantic haplotype diversity suggested a population expansion older than the lake itself. Levels of admixture at microsatellite loci were less obvious due to their high variability, and coalescence methods were used to estimate past admixture proportions. Our results reinforce a model of a two‐step colonization of Europe by burbot from an ancestral Danubian refuge, and confirm the persistence of a secondary Atlantic refuge, as proposed to exist for other freshwater fish. We conclude that the present‐day burbot population in Lake Constance bears the genetic signature of both contemporary gene flow and historical separation events. Article in Journal/Newspaper Burbot Lota lota lota Wiley Online Library Molecular Ecology 15 12 3583 3600 |
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English |
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Abstract The burbot, Lota lota , is the only freshwater species of the codfish family and has a Holarctic distribution. Pleistocene glaciations caused significant geographical differentiation in the past, but its life history characterized by winter spawning migrations over large distances is likely to homogenize populations by contemporary gene flow. We investigated the population genetic structure of 541 burbots from Lake Constance and adjacent Rhine and Danube tributaries in Europe using the entire mitochondrial DNA (mtDNA) control region and 11 microsatellites. Microsatellites revealed considerable population divergence ( F ST = 0.26) and evidenced recent bottlenecks in two Central European rivers. In accordance to previous evidence two main phylogeographic lineages (Atlantic and Danubian) were found co‐occurring at similar frequencies in Lake Constance, where they currently undergo random mating as indicated by microsatellites. The Danubian lineage contributed only a small proportion to the lake's mtDNA diversity, and probably expanded within the lake shortly after its formation ∼10 000–15 000 bp . The larger Atlantic haplotype diversity suggested a population expansion older than the lake itself. Levels of admixture at microsatellite loci were less obvious due to their high variability, and coalescence methods were used to estimate past admixture proportions. Our results reinforce a model of a two‐step colonization of Europe by burbot from an ancestral Danubian refuge, and confirm the persistence of a secondary Atlantic refuge, as proposed to exist for other freshwater fish. We conclude that the present‐day burbot population in Lake Constance bears the genetic signature of both contemporary gene flow and historical separation events. |
format |
Article in Journal/Newspaper |
author |
BARLUENGA, MARTA SANETRA, MATTHIAS MEYER, AXEL |
spellingShingle |
BARLUENGA, MARTA SANETRA, MATTHIAS MEYER, AXEL Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia |
author_facet |
BARLUENGA, MARTA SANETRA, MATTHIAS MEYER, AXEL |
author_sort |
BARLUENGA, MARTA |
title |
Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia |
title_short |
Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia |
title_full |
Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia |
title_fullStr |
Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia |
title_full_unstemmed |
Genetic admixture of burbot (Teleostei: Lota lota) in Lake Constance from two European glacial refugia |
title_sort |
genetic admixture of burbot (teleostei: lota lota) in lake constance from two european glacial refugia |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1365-294x.2006.03045.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2006.03045.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2006.03045.x |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_source |
Molecular Ecology volume 15, issue 12, page 3583-3600 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-294x.2006.03045.x |
container_title |
Molecular Ecology |
container_volume |
15 |
container_issue |
12 |
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3583 |
op_container_end_page |
3600 |
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1800749297613930496 |