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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ftunivnebraskali:oai:digitalcommons.unl.edu:ncfwrustaff-1321 2023-11-12T04:10:25+01:00 Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness Wilson, Robert E. Sonsthagen, Sarah A. Lavretsky, Philip Majewski, Andrew Árnason, Einar Halldórsdóttir, Katrín Einarsson, Axel W. Wedemeyer, Kate Talbot, Sandra L. 2022-08-04T07:00:00Z application/pdf https://digitalcommons.unl.edu/ncfwrustaff/314 https://digitalcommons.unl.edu/context/ncfwrustaff/article/1321/viewcontent/Wilson_AS_2022_Low_levels_of_hybridization.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/ncfwrustaff/314 https://digitalcommons.unl.edu/context/ncfwrustaff/article/1321/viewcontent/Wilson_AS_2022_Low_levels_of_hybridization.pdf Nebraska Cooperative Fish & Wildlife Research Unit -- Staff Publications Arctic Arctogadus glacialis Boreogadus saida hybridization species-specific markers Animal Sciences Aquaculture and Fisheries Environmental Indicators and Impact Assessment Environmental Monitoring Environmental Sciences Natural Resource Economics Natural Resources and Conservation Water Resource Management text 2022 ftunivnebraskali 2023-10-30T12:13:31Z 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. Text Arctic cod Arctic Arctogadus glacialis Beaufort Sea Boreogadus saida Climate change polar cod Alaska University of Nebraska-Lincoln: DigitalCommons@UNL |
institution |
Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Arctic Arctogadus glacialis Boreogadus saida hybridization species-specific markers Animal Sciences Aquaculture and Fisheries Environmental Indicators and Impact Assessment Environmental Monitoring Environmental Sciences Natural Resource Economics Natural Resources and Conservation Water Resource Management |
spellingShingle |
Arctic Arctogadus glacialis Boreogadus saida hybridization species-specific markers Animal Sciences Aquaculture and Fisheries Environmental Indicators and Impact Assessment Environmental Monitoring Environmental Sciences Natural Resource Economics Natural Resources and Conservation Water Resource Management Wilson, Robert E. Sonsthagen, Sarah A. Lavretsky, Philip Majewski, Andrew Árnason, Einar Halldórsdóttir, Katrín Einarsson, Axel W. Wedemeyer, Kate Talbot, Sandra L. 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 Animal Sciences Aquaculture and Fisheries Environmental Indicators and Impact Assessment Environmental Monitoring Environmental Sciences Natural Resource Economics Natural Resources and Conservation Water Resource Management |
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 |
Text |
author |
Wilson, Robert E. Sonsthagen, Sarah A. Lavretsky, Philip Majewski, Andrew Árnason, Einar Halldórsdóttir, Katrín Einarsson, Axel W. Wedemeyer, Kate Talbot, Sandra L. |
author_facet |
Wilson, Robert E. Sonsthagen, Sarah A. Lavretsky, Philip Majewski, Andrew Árnason, Einar Halldórsdóttir, Katrín Einarsson, Axel W. Wedemeyer, Kate Talbot, Sandra L. |
author_sort |
Wilson, Robert E. |
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 |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2022 |
url |
https://digitalcommons.unl.edu/ncfwrustaff/314 https://digitalcommons.unl.edu/context/ncfwrustaff/article/1321/viewcontent/Wilson_AS_2022_Low_levels_of_hybridization.pdf |
genre |
Arctic cod Arctic Arctogadus glacialis Beaufort Sea Boreogadus saida Climate change polar cod Alaska |
genre_facet |
Arctic cod Arctic Arctogadus glacialis Beaufort Sea Boreogadus saida Climate change polar cod Alaska |
op_source |
Nebraska Cooperative Fish & Wildlife Research Unit -- Staff Publications |
op_relation |
https://digitalcommons.unl.edu/ncfwrustaff/314 https://digitalcommons.unl.edu/context/ncfwrustaff/article/1321/viewcontent/Wilson_AS_2022_Low_levels_of_hybridization.pdf |
_version_ |
1782329895606550528 |