Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering?
The recent increased integration of evolutionary theory into conservation programs has greatly improved our ability to protect endangered species. A common application of such theory links population dynamics and indices of genetic diversity, usually estimated from neutrally evolving markers. Howeve...
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ftoceanrep:oai:oceanrep.geomar.de:32056 |
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openpolar |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The recent increased integration of evolutionary theory into conservation programs has greatly improved our ability to protect endangered species. A common application of such theory links population dynamics and indices of genetic diversity, usually estimated from neutrally evolving markers. However, some studies have suggested that highly polymorphic adaptive genes, such as the immune genes of the Major Histocompatibility Complex (MHC), might be more sensitive to fluctuations in population dynamics. As such, the combination of neutrally- and adaptively-evolving genes may be informative in populations where reductions in abundance have been documented. The European eel (Anguilla anguilla) underwent a drastic and well-reported decline in abundance in the late 20th century and still displays low recruitment. Here we compared genetic diversity indices estimated from neutral (mitochondrial DNA and microsatellites) and adaptive markers (MHC) between two distinct generations of European eels. Our results revealed a clear discrepancy between signatures obtained for each class of markers. Although mtDNA and microsatellites showed no changes in diversity between the older and the younger generations, MHC diversity revealed a contemporary drop followed by a recent increase. Our results suggest ongoing gain of MHC genetic diversity resulting from the interplay between drift and selection and ultimately increasing the adaptive potential of the species. |
format |
Article in Journal/Newspaper |
author |
Baltazar-Soares, Miguel Bracamonte, Seraina E. Bayer, Till Chain, Frederic J.J. Hanel, Reinhold Harrod, Chris Eizaguirre, Christophe |
spellingShingle |
Baltazar-Soares, Miguel Bracamonte, Seraina E. Bayer, Till Chain, Frederic J.J. Hanel, Reinhold Harrod, Chris Eizaguirre, Christophe Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering? |
author_facet |
Baltazar-Soares, Miguel Bracamonte, Seraina E. Bayer, Till Chain, Frederic J.J. Hanel, Reinhold Harrod, Chris Eizaguirre, Christophe |
author_sort |
Baltazar-Soares, Miguel |
title |
Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering? |
title_short |
Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering? |
title_full |
Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering? |
title_fullStr |
Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering? |
title_full_unstemmed |
Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering? |
title_sort |
evaluating the adaptive potential of the european eel: is the immunogenetic status recovering? |
publisher |
PeerJ |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/32056/ https://oceanrep.geomar.de/id/eprint/32056/1/Baltazar-Soares%20et%20al%202016%20PeerJ.pdf https://oceanrep.geomar.de/id/eprint/32056/2/Data_S1_-_mtDNA_Haplotypes_sequences_and_frequencies.docx https://oceanrep.geomar.de/id/eprint/32056/3/Data_S2_-_Microsatellite_allelic_frequencies_.docx https://oceanrep.geomar.de/id/eprint/32056/4/Data_S3_-_MHC_allele_sequences.rtf https://oceanrep.geomar.de/id/eprint/32056/5/DATA_S4_MHC_SEQUENCE_REFERENCE_NUMBERS.TXT https://oceanrep.geomar.de/id/eprint/32056/6/Table_S2.docx https://oceanrep.geomar.de/id/eprint/32056/7/Table_S3.docx https://oceanrep.geomar.de/id/eprint/32056/8/Table_S4.docx https://oceanrep.geomar.de/id/eprint/32056/9/Table_S5.docx https://oceanrep.geomar.de/id/eprint/32056/10/Fig_S1.png https://oceanrep.geomar.de/id/eprint/32056/11/Fig_S2.png https://oceanrep.geomar.de/id/eprint/32056/12/Fig_S3.png https://oceanrep.geomar.de/id/eprint/32056/13/Fig_S4.png https://oceanrep.geomar.de/id/eprint/32056/14/Fig_S5.png https://doi.org/10.7717/peerj.1868 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_relation |
https://oceanrep.geomar.de/id/eprint/32056/1/Baltazar-Soares%20et%20al%202016%20PeerJ.pdf https://oceanrep.geomar.de/id/eprint/32056/2/Data_S1_-_mtDNA_Haplotypes_sequences_and_frequencies.docx https://oceanrep.geomar.de/id/eprint/32056/3/Data_S2_-_Microsatellite_allelic_frequencies_.docx https://oceanrep.geomar.de/id/eprint/32056/4/Data_S3_-_MHC_allele_sequences.rtf https://oceanrep.geomar.de/id/eprint/32056/5/DATA_S4_MHC_SEQUENCE_REFERENCE_NUMBERS.TXT https://oceanrep.geomar.de/id/eprint/32056/6/Table_S2.docx https://oceanrep.geomar.de/id/eprint/32056/7/Table_S3.docx https://oceanrep.geomar.de/id/eprint/32056/8/Table_S4.docx https://oceanrep.geomar.de/id/eprint/32056/9/Table_S5.docx https://oceanrep.geomar.de/id/eprint/32056/10/Fig_S1.png https://oceanrep.geomar.de/id/eprint/32056/11/Fig_S2.png https://oceanrep.geomar.de/id/eprint/32056/12/Fig_S3.png https://oceanrep.geomar.de/id/eprint/32056/13/Fig_S4.png https://oceanrep.geomar.de/id/eprint/32056/14/Fig_S5.png Baltazar-Soares, M. , Bracamonte, S. E., Bayer, T. , Chain, F. J. J., Hanel, R., Harrod, C. and Eizaguirre, C. (2016) Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering?. Open Access PeerJ, 4 . e1868. DOI 10.7717/peerj.1868 <https://doi.org/10.7717/peerj.1868>. doi:10.7717/peerj.1868 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.7717/peerj.1868 |
container_title |
PeerJ |
container_volume |
4 |
container_start_page |
e1868 |
_version_ |
1766400644303814656 |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:32056 2023-05-15T13:27:50+02:00 Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering? Baltazar-Soares, Miguel Bracamonte, Seraina E. Bayer, Till Chain, Frederic J.J. Hanel, Reinhold Harrod, Chris Eizaguirre, Christophe 2016-04-11 text other image https://oceanrep.geomar.de/id/eprint/32056/ https://oceanrep.geomar.de/id/eprint/32056/1/Baltazar-Soares%20et%20al%202016%20PeerJ.pdf https://oceanrep.geomar.de/id/eprint/32056/2/Data_S1_-_mtDNA_Haplotypes_sequences_and_frequencies.docx https://oceanrep.geomar.de/id/eprint/32056/3/Data_S2_-_Microsatellite_allelic_frequencies_.docx https://oceanrep.geomar.de/id/eprint/32056/4/Data_S3_-_MHC_allele_sequences.rtf https://oceanrep.geomar.de/id/eprint/32056/5/DATA_S4_MHC_SEQUENCE_REFERENCE_NUMBERS.TXT https://oceanrep.geomar.de/id/eprint/32056/6/Table_S2.docx https://oceanrep.geomar.de/id/eprint/32056/7/Table_S3.docx https://oceanrep.geomar.de/id/eprint/32056/8/Table_S4.docx https://oceanrep.geomar.de/id/eprint/32056/9/Table_S5.docx https://oceanrep.geomar.de/id/eprint/32056/10/Fig_S1.png https://oceanrep.geomar.de/id/eprint/32056/11/Fig_S2.png https://oceanrep.geomar.de/id/eprint/32056/12/Fig_S3.png https://oceanrep.geomar.de/id/eprint/32056/13/Fig_S4.png https://oceanrep.geomar.de/id/eprint/32056/14/Fig_S5.png https://doi.org/10.7717/peerj.1868 en eng PeerJ https://oceanrep.geomar.de/id/eprint/32056/1/Baltazar-Soares%20et%20al%202016%20PeerJ.pdf https://oceanrep.geomar.de/id/eprint/32056/2/Data_S1_-_mtDNA_Haplotypes_sequences_and_frequencies.docx https://oceanrep.geomar.de/id/eprint/32056/3/Data_S2_-_Microsatellite_allelic_frequencies_.docx https://oceanrep.geomar.de/id/eprint/32056/4/Data_S3_-_MHC_allele_sequences.rtf https://oceanrep.geomar.de/id/eprint/32056/5/DATA_S4_MHC_SEQUENCE_REFERENCE_NUMBERS.TXT https://oceanrep.geomar.de/id/eprint/32056/6/Table_S2.docx https://oceanrep.geomar.de/id/eprint/32056/7/Table_S3.docx https://oceanrep.geomar.de/id/eprint/32056/8/Table_S4.docx https://oceanrep.geomar.de/id/eprint/32056/9/Table_S5.docx https://oceanrep.geomar.de/id/eprint/32056/10/Fig_S1.png https://oceanrep.geomar.de/id/eprint/32056/11/Fig_S2.png https://oceanrep.geomar.de/id/eprint/32056/12/Fig_S3.png https://oceanrep.geomar.de/id/eprint/32056/13/Fig_S4.png https://oceanrep.geomar.de/id/eprint/32056/14/Fig_S5.png Baltazar-Soares, M. , Bracamonte, S. E., Bayer, T. , Chain, F. J. J., Hanel, R., Harrod, C. and Eizaguirre, C. (2016) Evaluating the adaptive potential of the European eel: is the immunogenetic status recovering?. Open Access PeerJ, 4 . e1868. DOI 10.7717/peerj.1868 <https://doi.org/10.7717/peerj.1868>. doi:10.7717/peerj.1868 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.7717/peerj.1868 2023-04-07T15:24:50Z The recent increased integration of evolutionary theory into conservation programs has greatly improved our ability to protect endangered species. A common application of such theory links population dynamics and indices of genetic diversity, usually estimated from neutrally evolving markers. However, some studies have suggested that highly polymorphic adaptive genes, such as the immune genes of the Major Histocompatibility Complex (MHC), might be more sensitive to fluctuations in population dynamics. As such, the combination of neutrally- and adaptively-evolving genes may be informative in populations where reductions in abundance have been documented. The European eel (Anguilla anguilla) underwent a drastic and well-reported decline in abundance in the late 20th century and still displays low recruitment. Here we compared genetic diversity indices estimated from neutral (mitochondrial DNA and microsatellites) and adaptive markers (MHC) between two distinct generations of European eels. Our results revealed a clear discrepancy between signatures obtained for each class of markers. Although mtDNA and microsatellites showed no changes in diversity between the older and the younger generations, MHC diversity revealed a contemporary drop followed by a recent increase. Our results suggest ongoing gain of MHC genetic diversity resulting from the interplay between drift and selection and ultimately increasing the adaptive potential of the species. Article in Journal/Newspaper Anguilla anguilla European eel OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) PeerJ 4 e1868 |