Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes
<jats:p>Ancient DNA (aDNA) approaches have been successfully used to infer the long-term impacts of climate change, domestication, and human exploitation in a range of terrestrial species. Nonetheless, studies investigating such impacts using aDNA in marine species are rare. Atlantic cod (<...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/324064 2024-02-04T09:58:46+01:00 Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes Martínez-García, L Ferrari, G Oosting, T Ballantyne, R van der Jagt, I Ystgaard, I Harland, J Nicholson, R Hamilton-Dyer, S Baalsrud, HT Brieuc, MSO Atmore, LM Burns, F Schmölcke, U Jakobsen, KS Jentoft, S Orton, D Hufthammer, AK Barrett, JH Star, B 2021-06-18T11:08:47Z application/pdf application/zip text/xml https://www.repository.cam.ac.uk/handle/1810/324064 https://doi.org/10.17863/CAM.71522 en eng eng Frontiers Media SA http://dx.doi.org/10.3389/fevo.2021.671281 Frontiers in Ecology and Evolution https://www.repository.cam.ac.uk/handle/1810/324064 doi:10.17863/CAM.71522 population structure fisheries human exploitation phylogenomics population expansion demographic history Article 2021 ftunivcam https://doi.org/10.17863/CAM.71522 2024-01-11T23:24:13Z <jats:p>Ancient DNA (aDNA) approaches have been successfully used to infer the long-term impacts of climate change, domestication, and human exploitation in a range of terrestrial species. Nonetheless, studies investigating such impacts using aDNA in marine species are rare. Atlantic cod (<jats:italic>Gadus morhua</jats:italic>), is an economically important species that has experienced dramatic census population declines during the last century. Here, we investigated 48 ancient mitogenomes from historical specimens obtained from a range of archeological excavations in northern Europe dated up to 6,500 BCE. We compare these mitogenomes to those of 496 modern conspecifics sampled across the North Atlantic Ocean and adjacent seas. Our results confirm earlier observations of high levels of mitogenomic variation and a lack of mutation-drift equilibrium—suggestive of population expansion. Furthermore, our temporal comparison yields no evidence of measurable mitogenomic changes through time. Instead, our results indicate that mitogenomic variation in Atlantic cod reflects past demographic processes driven by major historical events (such as oscillations in sea level) and subsequent gene flow rather than contemporary fluctuations in stock abundance. Our results indicate that historical and contemporaneous anthropogenic pressures such as commercial fisheries have had little impact on mitogenomic diversity in a wide-spread marine species with high gene flow such as Atlantic cod. These observations do not contradict evidence that overfishing has had negative consequences for the abundance of Atlantic cod and the importance of genetic variation in implementing conservation strategies. Instead, these observations imply that any measures toward the demographic recovery of Atlantic cod in the eastern Atlantic, will not be constrained by recent loss of historical mitogenomic variation.</jats:p> Article in Journal/Newspaper atlantic cod Gadus morhua North Atlantic Apollo - University of Cambridge Repository |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
population structure fisheries human exploitation phylogenomics population expansion demographic history |
spellingShingle |
population structure fisheries human exploitation phylogenomics population expansion demographic history Martínez-García, L Ferrari, G Oosting, T Ballantyne, R van der Jagt, I Ystgaard, I Harland, J Nicholson, R Hamilton-Dyer, S Baalsrud, HT Brieuc, MSO Atmore, LM Burns, F Schmölcke, U Jakobsen, KS Jentoft, S Orton, D Hufthammer, AK Barrett, JH Star, B Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes |
topic_facet |
population structure fisheries human exploitation phylogenomics population expansion demographic history |
description |
<jats:p>Ancient DNA (aDNA) approaches have been successfully used to infer the long-term impacts of climate change, domestication, and human exploitation in a range of terrestrial species. Nonetheless, studies investigating such impacts using aDNA in marine species are rare. Atlantic cod (<jats:italic>Gadus morhua</jats:italic>), is an economically important species that has experienced dramatic census population declines during the last century. Here, we investigated 48 ancient mitogenomes from historical specimens obtained from a range of archeological excavations in northern Europe dated up to 6,500 BCE. We compare these mitogenomes to those of 496 modern conspecifics sampled across the North Atlantic Ocean and adjacent seas. Our results confirm earlier observations of high levels of mitogenomic variation and a lack of mutation-drift equilibrium—suggestive of population expansion. Furthermore, our temporal comparison yields no evidence of measurable mitogenomic changes through time. Instead, our results indicate that mitogenomic variation in Atlantic cod reflects past demographic processes driven by major historical events (such as oscillations in sea level) and subsequent gene flow rather than contemporary fluctuations in stock abundance. Our results indicate that historical and contemporaneous anthropogenic pressures such as commercial fisheries have had little impact on mitogenomic diversity in a wide-spread marine species with high gene flow such as Atlantic cod. These observations do not contradict evidence that overfishing has had negative consequences for the abundance of Atlantic cod and the importance of genetic variation in implementing conservation strategies. Instead, these observations imply that any measures toward the demographic recovery of Atlantic cod in the eastern Atlantic, will not be constrained by recent loss of historical mitogenomic variation.</jats:p> |
format |
Article in Journal/Newspaper |
author |
Martínez-García, L Ferrari, G Oosting, T Ballantyne, R van der Jagt, I Ystgaard, I Harland, J Nicholson, R Hamilton-Dyer, S Baalsrud, HT Brieuc, MSO Atmore, LM Burns, F Schmölcke, U Jakobsen, KS Jentoft, S Orton, D Hufthammer, AK Barrett, JH Star, B |
author_facet |
Martínez-García, L Ferrari, G Oosting, T Ballantyne, R van der Jagt, I Ystgaard, I Harland, J Nicholson, R Hamilton-Dyer, S Baalsrud, HT Brieuc, MSO Atmore, LM Burns, F Schmölcke, U Jakobsen, KS Jentoft, S Orton, D Hufthammer, AK Barrett, JH Star, B |
author_sort |
Martínez-García, L |
title |
Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes |
title_short |
Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes |
title_full |
Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes |
title_fullStr |
Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes |
title_full_unstemmed |
Historical Demographic Processes Dominate Genetic Variation in Ancient Atlantic Cod Mitogenomes |
title_sort |
historical demographic processes dominate genetic variation in ancient atlantic cod mitogenomes |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
https://www.repository.cam.ac.uk/handle/1810/324064 https://doi.org/10.17863/CAM.71522 |
genre |
atlantic cod Gadus morhua North Atlantic |
genre_facet |
atlantic cod Gadus morhua North Atlantic |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/324064 doi:10.17863/CAM.71522 |
op_doi |
https://doi.org/10.17863/CAM.71522 |
_version_ |
1789963316943126528 |