Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness
As marine ecosystems respond to climate change and other stressors, it is necessary to evaluate current and past hybridization events to gain insight on the outcomes and drivers of such events. Ancestral introgression within the gadids has been suggested to allow cod to inhabit a variety of habitats...
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Canadian Science Publishing
2022
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Online Access: | https://doi.org/10.1139/as-2021-0030 https://doaj.org/article/7a2b26210eaf414f9f7b29e828b072b0 |
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ftdoajarticles:oai:doaj.org/article:7a2b26210eaf414f9f7b29e828b072b0 2023-05-15T14:23:47+02:00 Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness Robert E. Wilson Sarah A. Sonsthagen Philip Lavretsky Andrew Majewski Einar Árnason Katrín Halldórsdóttir Axel W. Einarsson Kate Wedemeyer Sandra L. Talbot 2022-12-01T00:00:00Z https://doi.org/10.1139/as-2021-0030 https://doaj.org/article/7a2b26210eaf414f9f7b29e828b072b0 EN FR eng fre Canadian Science Publishing https://cdnsciencepub.com/doi/10.1139/as-2021-0030 https://doaj.org/toc/2368-7460 doi:10.1139/as-2021-0030 2368-7460 https://doaj.org/article/7a2b26210eaf414f9f7b29e828b072b0 Arctic Science, Vol 8, Iss 4, Pp 1082-1093 (2022) Arctic Arctogadus glacialis Boreogadus saida hybridization species-specific markers Arctique Environmental sciences GE1-350 Environmental engineering TA170-171 article 2022 ftdoajarticles https://doi.org/10.1139/as-2021-0030 2022-12-30T20:12:35Z As marine ecosystems respond to climate change and other stressors, it is necessary to evaluate current and past hybridization events to gain insight on the outcomes and drivers of such events. Ancestral introgression within the gadids has been suggested to allow cod to inhabit a variety of habitats. Little attention has been given to contemporary hybridization, especially within cold-water-adapted cod (Boreogadus saida Lepechin, 1774 and Arctogadus glacialis Peters, 1872). We used whole-genome, restriction-site associated, and mitochondrial sequence data to explore the degree and direction of hybridization between these species where previous hybridization had not been reported. Although nearly identical morphologically at certain life stages, we detected very distinct nuclear and mitochondrial lineages. We detected one potential hybrid with a Arctogadus mitochondrial haplotype and Boreogadus nuclear genotype, but no early generational hybrids. The presence of a late generation hybrid suggests that at least some hybrids survive to maturity and reproduce. However, a historical introgression event could not be excluded. Contemporary gene flow appears asymmetrical from Arctogadus into Boreogadus, which may be due to overlap in timing of spawning, environmental heterogeneity, or differences in population size. This study provides important baseline information for the degree of potential hybridization between these species within Alaska marine environments. Article in Journal/Newspaper Arctic Arctic cod Arctic Arctique* Arctogadus glacialis Beaufort Sea Boreogadus saida Climate change polar cod Alaska Directory of Open Access Journals: DOAJ Articles Arctic Arctic Science |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
Arctic Arctogadus glacialis Boreogadus saida hybridization species-specific markers Arctique Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
Arctic Arctogadus glacialis Boreogadus saida hybridization species-specific markers Arctique Environmental sciences GE1-350 Environmental engineering TA170-171 Robert E. Wilson Sarah A. Sonsthagen Philip Lavretsky Andrew Majewski Einar Árnason Katrín Halldórsdóttir Axel W. Einarsson Kate Wedemeyer Sandra L. Talbot Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness |
topic_facet |
Arctic Arctogadus glacialis Boreogadus saida hybridization species-specific markers Arctique Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
As marine ecosystems respond to climate change and other stressors, it is necessary to evaluate current and past hybridization events to gain insight on the outcomes and drivers of such events. Ancestral introgression within the gadids has been suggested to allow cod to inhabit a variety of habitats. Little attention has been given to contemporary hybridization, especially within cold-water-adapted cod (Boreogadus saida Lepechin, 1774 and Arctogadus glacialis Peters, 1872). We used whole-genome, restriction-site associated, and mitochondrial sequence data to explore the degree and direction of hybridization between these species where previous hybridization had not been reported. Although nearly identical morphologically at certain life stages, we detected very distinct nuclear and mitochondrial lineages. We detected one potential hybrid with a Arctogadus mitochondrial haplotype and Boreogadus nuclear genotype, but no early generational hybrids. The presence of a late generation hybrid suggests that at least some hybrids survive to maturity and reproduce. However, a historical introgression event could not be excluded. Contemporary gene flow appears asymmetrical from Arctogadus into Boreogadus, which may be due to overlap in timing of spawning, environmental heterogeneity, or differences in population size. This study provides important baseline information for the degree of potential hybridization between these species within Alaska marine environments. |
format |
Article in Journal/Newspaper |
author |
Robert E. Wilson Sarah A. Sonsthagen Philip Lavretsky Andrew Majewski Einar Árnason Katrín Halldórsdóttir Axel W. Einarsson Kate Wedemeyer Sandra L. Talbot |
author_facet |
Robert E. Wilson Sarah A. Sonsthagen Philip Lavretsky Andrew Majewski Einar Árnason Katrín Halldórsdóttir Axel W. Einarsson Kate Wedemeyer Sandra L. Talbot |
author_sort |
Robert E. Wilson |
title |
Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness |
title_short |
Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness |
title_full |
Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness |
title_fullStr |
Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness |
title_full_unstemmed |
Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness |
title_sort |
low levels of hybridization between sympatric cold-water-adapted arctic cod and polar cod in the beaufort sea confirm genetic distinctiveness |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
https://doi.org/10.1139/as-2021-0030 https://doaj.org/article/7a2b26210eaf414f9f7b29e828b072b0 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic cod Arctic Arctique* Arctogadus glacialis Beaufort Sea Boreogadus saida Climate change polar cod Alaska |
genre_facet |
Arctic Arctic cod Arctic Arctique* Arctogadus glacialis Beaufort Sea Boreogadus saida Climate change polar cod Alaska |
op_source |
Arctic Science, Vol 8, Iss 4, Pp 1082-1093 (2022) |
op_relation |
https://cdnsciencepub.com/doi/10.1139/as-2021-0030 https://doaj.org/toc/2368-7460 doi:10.1139/as-2021-0030 2368-7460 https://doaj.org/article/7a2b26210eaf414f9f7b29e828b072b0 |
op_doi |
https://doi.org/10.1139/as-2021-0030 |
container_title |
Arctic Science |
_version_ |
1766296275126321152 |