High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic
International audience Despite the openness of the oceanic environment, limited dispersal and tight social structure often induce genetic structuring in marine organisms, even in large animals such as cetaceans. In the bottlenose dolphin, mitochondrial and nuclear DNA analyses have revealed the exis...
Published in: | Conservation Genetics |
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Online Access: | https://hal.ird.fr/ird-00504896 https://hal.ird.fr/ird-00504896/document https://hal.ird.fr/ird-00504896/file/Querouil-al-CG-preprint.pdf https://doi.org/10.1007/s10592-007-9291-5 |
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ftccsdartic:oai:HAL:ird-00504896v1 2023-05-15T17:27:50+02:00 High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic Quérouil, Sophie Silva, M. A. Freitas, Luis Prieto, R. Magalhaes, S. Dinis, Ana Alves, Filipe Matos, J., Mendonça, Diogo Hammond, Philip, Santos, R. S. Departamento de Oceanografia e Pescas da Universidade dos Açores Instituto do Mar (IMAR) Departamento de Biotecnologia Instituto Nacional de Engenharia, Tecnologia e Inovacao (INETI) Caractérisation et valorisation de la diversité ichtyologique pour une aquaculture raisonnée (CAVIAR) Instituto do Mar & Department of Oceanography and Fisheries - University of the Azores (IMAR-DOP) IMAR Museau de Baleia da Madeira museu da Baleia Laboratorio de Genetica e Biologia Molecular (LGBM) 2007 https://hal.ird.fr/ird-00504896 https://hal.ird.fr/ird-00504896/document https://hal.ird.fr/ird-00504896/file/Querouil-al-CG-preprint.pdf https://doi.org/10.1007/s10592-007-9291-5 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s10592-007-9291-5 ird-00504896 https://hal.ird.fr/ird-00504896 https://hal.ird.fr/ird-00504896/document https://hal.ird.fr/ird-00504896/file/Querouil-al-CG-preprint.pdf doi:10.1007/s10592-007-9291-5 IRD: fdi:010040835 info:eu-repo/semantics/OpenAccess ISSN: 1566-0621 EISSN: 1572-9737 Conservation Genetics https://hal.ird.fr/ird-00504896 Conservation Genetics, Springer Verlag, 2007, 8, pp.1405-1419. ⟨10.1007/s10592-007-9291-5⟩ [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] info:eu-repo/semantics/article Journal articles 2007 ftccsdartic https://doi.org/10.1007/s10592-007-9291-5 2021-12-05T03:47:49Z International audience Despite the openness of the oceanic environment, limited dispersal and tight social structure often induce genetic structuring in marine organisms, even in large animals such as cetaceans. In the bottlenose dolphin, mitochondrial and nuclear DNA analyses have revealed the existence of genetic differentiation between pelagic (or offshore) and coastal (or nearshore) ecotypes in the western North Atlantic, as well as between coastal populations. Because previous studies concentrated on continental margins, we analysed the population structure of bottlenose dolphins in two of the most isolated archipelagos of the North Atlantic: the Azores and Madeira. We analysed 112 samples collected on live animals in the two archipelagos, and nine samples collected on stranded animals in Madeira and mainland Portugal. Genetic analyses consisted in molecular sexing, sequencing of part of the mitochondrial hyper-variable region, and screening of ten microsatellite loci. We predicted that: 1/ there is at least one pelagic and one or more coastal populations in each archipelago; 2/ populations are differentiated between and possibly within archipelagos. Contrary to these predictions, results indicated a lack of population structure in the study area. In addition, comparison with published sequences revealed that the samples from the Azores and Madeira were not significantly differentiated from samples of the pelagic population of the western North Atlantic. Thus, bottlenose dolphins occurring in the pelagic waters of the North Atlantic belong to a large oceanic population, which should be regarded as a single conservation unit. Unlike what is known for coastal populations, oceanic bottlenose dolphins are able to maintain high levels of gene flow. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Conservation Genetics 8 6 1405 1419 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] |
spellingShingle |
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] Quérouil, Sophie Silva, M. A. Freitas, Luis Prieto, R. Magalhaes, S. Dinis, Ana Alves, Filipe Matos, J., Mendonça, Diogo Hammond, Philip, Santos, R. S. High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic |
topic_facet |
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] |
description |
International audience Despite the openness of the oceanic environment, limited dispersal and tight social structure often induce genetic structuring in marine organisms, even in large animals such as cetaceans. In the bottlenose dolphin, mitochondrial and nuclear DNA analyses have revealed the existence of genetic differentiation between pelagic (or offshore) and coastal (or nearshore) ecotypes in the western North Atlantic, as well as between coastal populations. Because previous studies concentrated on continental margins, we analysed the population structure of bottlenose dolphins in two of the most isolated archipelagos of the North Atlantic: the Azores and Madeira. We analysed 112 samples collected on live animals in the two archipelagos, and nine samples collected on stranded animals in Madeira and mainland Portugal. Genetic analyses consisted in molecular sexing, sequencing of part of the mitochondrial hyper-variable region, and screening of ten microsatellite loci. We predicted that: 1/ there is at least one pelagic and one or more coastal populations in each archipelago; 2/ populations are differentiated between and possibly within archipelagos. Contrary to these predictions, results indicated a lack of population structure in the study area. In addition, comparison with published sequences revealed that the samples from the Azores and Madeira were not significantly differentiated from samples of the pelagic population of the western North Atlantic. Thus, bottlenose dolphins occurring in the pelagic waters of the North Atlantic belong to a large oceanic population, which should be regarded as a single conservation unit. Unlike what is known for coastal populations, oceanic bottlenose dolphins are able to maintain high levels of gene flow. |
author2 |
Departamento de Oceanografia e Pescas da Universidade dos Açores Instituto do Mar (IMAR) Departamento de Biotecnologia Instituto Nacional de Engenharia, Tecnologia e Inovacao (INETI) Caractérisation et valorisation de la diversité ichtyologique pour une aquaculture raisonnée (CAVIAR) Instituto do Mar & Department of Oceanography and Fisheries - University of the Azores (IMAR-DOP) IMAR Museau de Baleia da Madeira museu da Baleia Laboratorio de Genetica e Biologia Molecular (LGBM) |
format |
Article in Journal/Newspaper |
author |
Quérouil, Sophie Silva, M. A. Freitas, Luis Prieto, R. Magalhaes, S. Dinis, Ana Alves, Filipe Matos, J., Mendonça, Diogo Hammond, Philip, Santos, R. S. |
author_facet |
Quérouil, Sophie Silva, M. A. Freitas, Luis Prieto, R. Magalhaes, S. Dinis, Ana Alves, Filipe Matos, J., Mendonça, Diogo Hammond, Philip, Santos, R. S. |
author_sort |
Quérouil, Sophie |
title |
High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic |
title_short |
High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic |
title_full |
High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic |
title_fullStr |
High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic |
title_full_unstemmed |
High gene flow in oceanic bottlenose dolphins (Tursiops truncatus) of the North Atlantic |
title_sort |
high gene flow in oceanic bottlenose dolphins (tursiops truncatus) of the north atlantic |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.ird.fr/ird-00504896 https://hal.ird.fr/ird-00504896/document https://hal.ird.fr/ird-00504896/file/Querouil-al-CG-preprint.pdf https://doi.org/10.1007/s10592-007-9291-5 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1566-0621 EISSN: 1572-9737 Conservation Genetics https://hal.ird.fr/ird-00504896 Conservation Genetics, Springer Verlag, 2007, 8, pp.1405-1419. ⟨10.1007/s10592-007-9291-5⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10592-007-9291-5 ird-00504896 https://hal.ird.fr/ird-00504896 https://hal.ird.fr/ird-00504896/document https://hal.ird.fr/ird-00504896/file/Querouil-al-CG-preprint.pdf doi:10.1007/s10592-007-9291-5 IRD: fdi:010040835 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s10592-007-9291-5 |
container_title |
Conservation Genetics |
container_volume |
8 |
container_issue |
6 |
container_start_page |
1405 |
op_container_end_page |
1419 |
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1766120153539411968 |