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 5000 km back to the European and North African coasts. The two species have been regarded as classic textbook examples of panmixia, e...
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2011
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ftvliz:oai:oma.vliz.be:204871 2023-05-15T13:27:55+02:00 All roads lead to home: panmixia of European eel in the Sargasso Sea Als, T.D. Hansen, M.M. Maes, G.E. Castonguay, M. Riemann, L. Aarestrup, K. Munk, P. Sparholt, H. Hanel, R. Bernatchez, L. 2011 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=204871 en eng info:eu-repo/semantics/altIdentifier/wos/000288705300005 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1111/j.1365-294X.2011.05011.x http://www.vliz.be/nl/open-marien-archief?module=ref&refid=204871 info:eu-repo/semantics/restrictedAccess %3Ci%3EMol.+Ecol.+20%287%29%3C%2Fi%3E%3A+1333-1346.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1111%2Fj.1365-294X.2011.05011.x%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1111%2Fj.1365-294X.2011.05011.x%3C%2Fa%3E Anguilla Hybridization Spawning migrations info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftvliz https://doi.org/10.1111/j.1365-294X.2011.05011.x 2022-05-01T09:28:59Z European eels (Anguilla anguilla) spawn in the remote Sargasso Sea in partial sympatry with American eels (Anguilla rostrata), and juveniles are transported more than 5000 km 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 nonrandom 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. Article in Journal/Newspaper Anguilla anguilla European eel Iceland Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Molecular Ecology 20 7 1333 1346 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Anguilla Hybridization Spawning migrations |
spellingShingle |
Anguilla Hybridization Spawning migrations Als, T.D. Hansen, M.M. Maes, G.E. Castonguay, M. Riemann, L. Aarestrup, K. Munk, P. Sparholt, H. Hanel, R. Bernatchez, L. All roads lead to home: panmixia of European eel in the Sargasso Sea |
topic_facet |
Anguilla Hybridization Spawning migrations |
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 5000 km 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 nonrandom 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. |
format |
Article in Journal/Newspaper |
author |
Als, T.D. Hansen, M.M. Maes, G.E. Castonguay, M. Riemann, L. Aarestrup, K. Munk, P. Sparholt, H. Hanel, R. Bernatchez, L. |
author_facet |
Als, T.D. Hansen, M.M. Maes, G.E. Castonguay, M. Riemann, L. Aarestrup, K. Munk, P. Sparholt, H. Hanel, R. Bernatchez, L. |
author_sort |
Als, T.D. |
title |
All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_short |
All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_full |
All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_fullStr |
All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_full_unstemmed |
All roads lead to home: panmixia of European eel in the Sargasso Sea |
title_sort |
all roads lead to home: panmixia of european eel in the sargasso sea |
publishDate |
2011 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=204871 |
genre |
Anguilla anguilla European eel Iceland |
genre_facet |
Anguilla anguilla European eel Iceland |
op_source |
%3Ci%3EMol.+Ecol.+20%287%29%3C%2Fi%3E%3A+1333-1346.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1111%2Fj.1365-294X.2011.05011.x%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1111%2Fj.1365-294X.2011.05011.x%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000288705300005 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1111/j.1365-294X.2011.05011.x http://www.vliz.be/nl/open-marien-archief?module=ref&refid=204871 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1365-294X.2011.05011.x |
container_title |
Molecular Ecology |
container_volume |
20 |
container_issue |
7 |
container_start_page |
1333 |
op_container_end_page |
1346 |
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1766401125929451520 |