Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing
Processes leading to speciation in oceanic environments without obvious physical barriers remain poorly known. European and American eel (Anguilla anguilla and A. rostrata) spawn in partial sympatry in the Sargasso Sea. Larvae are advected by the Gulf Stream and other currents towards the European/N...
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ftdtupubl:oai:pure.atira.dk:publications/3632bba1-e0c5-4120-900b-aedec6cc44bc 2023-10-25T01:28:55+02:00 Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing Jacobsen, M.W. Pujolar, J.M. Gilbert, M.T.P. Moreno-Mayar, J.V. Bernatchez, L. Als, Thomas Damm Lobon-Cervia, J. Hansen, Michael Møller 2014 https://orbit.dtu.dk/en/publications/3632bba1-e0c5-4120-900b-aedec6cc44bc https://doi.org/10.1038/hdy.2014.44 eng eng info:eu-repo/semantics/closedAccess Jacobsen , M W , Pujolar , J M , Gilbert , M T P , Moreno-Mayar , J V , Bernatchez , L , Als , T D , Lobon-Cervia , J & Hansen , M M 2014 , ' Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing ' , Heredity , vol. 113 , no. 5 , pp. 432-442 . https://doi.org/10.1038/hdy.2014.44 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water article 2014 ftdtupubl https://doi.org/10.1038/hdy.2014.44 2023-09-27T22:56:39Z Processes leading to speciation in oceanic environments without obvious physical barriers remain poorly known. European and American eel (Anguilla anguilla and A. rostrata) spawn in partial sympatry in the Sargasso Sea. Larvae are advected by the Gulf Stream and other currents towards the European/North African and North American coasts, respectively. We analyzed 104 mitogenomes from the two species along with mitogenomes of other Anguilla and outgroup species. We estimated divergence time between the two species to identify major events involved in speciation. We also considered two previously stated hypotheses: one where the ancestral species was present in only one continent but was advected across the Atlantic by ocean current changes and another where population declines during Pleistocene glaciations led to increasing vicariance, facilitating speciation. Divergence time was estimated to ∼3.38 Mya, coinciding with the closure of the Panama Gateway that led to reinforcement of the Gulf Stream. This could have advected larvae towards European/North African coasts, in which case American eel would be expected to be the ancestral species. This scenario could, however, not be unequivocally confirmed by analyses of dN/dS, nucleotide diversity and effective population size estimates. Extended bayesian skyline plots showed fluctuations of effective population sizes and declines during glaciations, and thus also lending support to the importance of vicariance during speciation. There was evidence for positive selection at the ATP6 and possibly ND5 genes, indicating a role in speciation. The findings suggest an important role of ocean current changes in speciation of marine organisms Article in Journal/Newspaper Anguilla anguilla Technical University of Denmark: DTU Orbit Heredity 113 5 432 442 |
institution |
Open Polar |
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Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water Jacobsen, M.W. Pujolar, J.M. Gilbert, M.T.P. Moreno-Mayar, J.V. Bernatchez, L. Als, Thomas Damm Lobon-Cervia, J. Hansen, Michael Møller Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
description |
Processes leading to speciation in oceanic environments without obvious physical barriers remain poorly known. European and American eel (Anguilla anguilla and A. rostrata) spawn in partial sympatry in the Sargasso Sea. Larvae are advected by the Gulf Stream and other currents towards the European/North African and North American coasts, respectively. We analyzed 104 mitogenomes from the two species along with mitogenomes of other Anguilla and outgroup species. We estimated divergence time between the two species to identify major events involved in speciation. We also considered two previously stated hypotheses: one where the ancestral species was present in only one continent but was advected across the Atlantic by ocean current changes and another where population declines during Pleistocene glaciations led to increasing vicariance, facilitating speciation. Divergence time was estimated to ∼3.38 Mya, coinciding with the closure of the Panama Gateway that led to reinforcement of the Gulf Stream. This could have advected larvae towards European/North African coasts, in which case American eel would be expected to be the ancestral species. This scenario could, however, not be unequivocally confirmed by analyses of dN/dS, nucleotide diversity and effective population size estimates. Extended bayesian skyline plots showed fluctuations of effective population sizes and declines during glaciations, and thus also lending support to the importance of vicariance during speciation. There was evidence for positive selection at the ATP6 and possibly ND5 genes, indicating a role in speciation. The findings suggest an important role of ocean current changes in speciation of marine organisms |
format |
Article in Journal/Newspaper |
author |
Jacobsen, M.W. Pujolar, J.M. Gilbert, M.T.P. Moreno-Mayar, J.V. Bernatchez, L. Als, Thomas Damm Lobon-Cervia, J. Hansen, Michael Møller |
author_facet |
Jacobsen, M.W. Pujolar, J.M. Gilbert, M.T.P. Moreno-Mayar, J.V. Bernatchez, L. Als, Thomas Damm Lobon-Cervia, J. Hansen, Michael Møller |
author_sort |
Jacobsen, M.W. |
title |
Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing |
title_short |
Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing |
title_full |
Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing |
title_fullStr |
Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing |
title_full_unstemmed |
Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing |
title_sort |
speciation and demographic history of atlantic eels (anguilla anguilla and a. rostrata) revealed by mitogenome sequencing |
publishDate |
2014 |
url |
https://orbit.dtu.dk/en/publications/3632bba1-e0c5-4120-900b-aedec6cc44bc https://doi.org/10.1038/hdy.2014.44 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Jacobsen , M W , Pujolar , J M , Gilbert , M T P , Moreno-Mayar , J V , Bernatchez , L , Als , T D , Lobon-Cervia , J & Hansen , M M 2014 , ' Speciation and demographic history of Atlantic eels (Anguilla anguilla and A. rostrata) revealed by mitogenome sequencing ' , Heredity , vol. 113 , no. 5 , pp. 432-442 . https://doi.org/10.1038/hdy.2014.44 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1038/hdy.2014.44 |
container_title |
Heredity |
container_volume |
113 |
container_issue |
5 |
container_start_page |
432 |
op_container_end_page |
442 |
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1780729722069581824 |