Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea
European eels (Anguilla anguilla) spawn in the remote Sargasso Sea in partial sympatry with American eels (Anguilla rostrata), and juveniles are transported more than 5,000 kilometres back to the European and North African coasts. The two species have been regarded as classic textbook examples of pa...
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ftdryad:oai:v1.datadryad.org:10255/dryad.8155 2023-05-15T13:28:04+02:00 Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea Als, Thomas D Hansen, Michael M Maes, Gregory E Castonguay, Martin Riemann, Lasse Aarestrup, Kim Munk, Peter Sparholt, Henrik Hanel, Reinhold Bernatchez, Louis Morocco France Portugal the Netherlands Iceland Sweden Italy Sargasso Sea 2010-12-20T19:10:19Z http://hdl.handle.net/10255/dryad.8155 https://doi.org/10.5061/dryad.8155 unknown doi:10.5061/dryad.8155/1 doi:10.1111/j.1365-294X.2011.05011.x PMID:21299662 doi:10.5061/dryad.8155 Als TD, Hansen MM, Maes GE, Castonguay M, Riemann L, Aarestrup K, Munk P, Sparholt H, Hanel R, Bernatchez, L (2011) All roads lead to home: panmixia of European eel in the Sargasso Sea. Molecular Ecology 20(7): 1333–1346. http://hdl.handle.net/10255/dryad.8155 Population Genetics - Empirical Conservation Biology Conservation Genetics Hybridization Fish Fisheries Management 2010 ftdryad https://doi.org/10.5061/dryad.8155 https://doi.org/10.5061/dryad.8155/1 https://doi.org/10.1111/j.1365-294X.2011.05011.x 2020-01-01T14:19:38Z European eels (Anguilla anguilla) spawn in the remote Sargasso Sea in partial sympatry with American eels (Anguilla rostrata), and juveniles are transported more than 5,000 kilometres back to the European and North African coasts. The two species have been regarded as classic textbook examples of panmixia, each comprising a single, randomly mating population. However, several recent studies based on continental samples have found subtle, but significant, genetic differentiation, interpreted as geographical or temporal heterogeneity between samples. Moreover, European and American eels can hybridize, but hybrids have been observed almost exclusively in Iceland, suggesting hybridization in a specific region of the Sargasso Sea and subsequent non-random dispersal of larvae. Here, we report the first molecular population genetics study based on analysis of 21 microsatellite loci in larvae of both Atlantic eel species sampled directly in the spawning area, supplemented by analysis of European glass eel samples. Despite a clear East-West gradient in the overlapping distribution of the two species in the Sargasso Sea, we only observed a single putative hybrid, providing evidence against the hypothesis of a wide marine hybrid zone. Analyses of genetic differentiation, isolation by distance, isolation by time and assignment tests provided strong evidence for panmixia in both the Sargasso Sea and across all continental samples of European eel after accounting for the presence of sibs among newly hatched larvae. European eel has declined catastrophically, and our findings call for management of the species as a single unit, necessitating coordinated international conservation efforts. Other/Unknown Material Anguilla anguilla European eel Iceland Dryad Digital Repository (Duke University) |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Population Genetics - Empirical Conservation Biology Conservation Genetics Hybridization Fish Fisheries Management |
spellingShingle |
Population Genetics - Empirical Conservation Biology Conservation Genetics Hybridization Fish Fisheries Management Als, Thomas D Hansen, Michael M Maes, Gregory E Castonguay, Martin Riemann, Lasse Aarestrup, Kim Munk, Peter Sparholt, Henrik Hanel, Reinhold Bernatchez, Louis Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea |
topic_facet |
Population Genetics - Empirical Conservation Biology Conservation Genetics Hybridization Fish Fisheries Management |
description |
European eels (Anguilla anguilla) spawn in the remote Sargasso Sea in partial sympatry with American eels (Anguilla rostrata), and juveniles are transported more than 5,000 kilometres back to the European and North African coasts. The two species have been regarded as classic textbook examples of panmixia, each comprising a single, randomly mating population. However, several recent studies based on continental samples have found subtle, but significant, genetic differentiation, interpreted as geographical or temporal heterogeneity between samples. Moreover, European and American eels can hybridize, but hybrids have been observed almost exclusively in Iceland, suggesting hybridization in a specific region of the Sargasso Sea and subsequent non-random dispersal of larvae. Here, we report the first molecular population genetics study based on analysis of 21 microsatellite loci in larvae of both Atlantic eel species sampled directly in the spawning area, supplemented by analysis of European glass eel samples. Despite a clear East-West gradient in the overlapping distribution of the two species in the Sargasso Sea, we only observed a single putative hybrid, providing evidence against the hypothesis of a wide marine hybrid zone. Analyses of genetic differentiation, isolation by distance, isolation by time and assignment tests provided strong evidence for panmixia in both the Sargasso Sea and across all continental samples of European eel after accounting for the presence of sibs among newly hatched larvae. European eel has declined catastrophically, and our findings call for management of the species as a single unit, necessitating coordinated international conservation efforts. |
author |
Als, Thomas D Hansen, Michael M Maes, Gregory E Castonguay, Martin Riemann, Lasse Aarestrup, Kim Munk, Peter Sparholt, Henrik Hanel, Reinhold Bernatchez, Louis |
author_facet |
Als, Thomas D Hansen, Michael M Maes, Gregory E Castonguay, Martin Riemann, Lasse Aarestrup, Kim Munk, Peter Sparholt, Henrik Hanel, Reinhold Bernatchez, Louis |
author_sort |
Als, Thomas D |
title |
Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_short |
Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_full |
Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_fullStr |
Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_full_unstemmed |
Data from: All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_sort |
data from: all roads lead to home: panmixia of european eel in the sargasso sea |
publishDate |
2010 |
url |
http://hdl.handle.net/10255/dryad.8155 https://doi.org/10.5061/dryad.8155 |
op_coverage |
Morocco France Portugal the Netherlands Iceland Sweden Italy Sargasso Sea |
genre |
Anguilla anguilla European eel Iceland |
genre_facet |
Anguilla anguilla European eel Iceland |
op_relation |
doi:10.5061/dryad.8155/1 doi:10.1111/j.1365-294X.2011.05011.x PMID:21299662 doi:10.5061/dryad.8155 Als TD, Hansen MM, Maes GE, Castonguay M, Riemann L, Aarestrup K, Munk P, Sparholt H, Hanel R, Bernatchez, L (2011) All roads lead to home: panmixia of European eel in the Sargasso Sea. Molecular Ecology 20(7): 1333–1346. http://hdl.handle.net/10255/dryad.8155 |
op_doi |
https://doi.org/10.5061/dryad.8155 https://doi.org/10.5061/dryad.8155/1 https://doi.org/10.1111/j.1365-294X.2011.05011.x |
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