Evolution of population structure in an estuarine‐dependent marine fish
Abstract Restriction site‐associated DNA (RAD) sequencing was used to characterize neutral and adaptive genetic variation among geographic samples of red drum, Sciaenops ocellatus , an estuarine‐dependent fish found in coastal waters along the southeastern coast of the United States (Atlantic) and t...
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crwiley:10.1002/ece3.4936 2024-09-30T14:41:50+00:00 Evolution of population structure in an estuarine‐dependent marine fish Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. Texas Sea Grant, Texas A and M University National Oceanic and Atmospheric Administration 2019 http://dx.doi.org/10.1002/ece3.4936 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.4936 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.4936 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.4936 en eng Wiley http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 9, issue 6, page 3141-3152 ISSN 2045-7758 2045-7758 journal-article 2019 crwiley https://doi.org/10.1002/ece3.4936 2024-09-05T05:09:48Z Abstract Restriction site‐associated DNA (RAD) sequencing was used to characterize neutral and adaptive genetic variation among geographic samples of red drum, Sciaenops ocellatus , an estuarine‐dependent fish found in coastal waters along the southeastern coast of the United States (Atlantic) and the northern Gulf of Mexico (Gulf). Analyses of neutral and outlier loci revealed three genetically distinct regional clusters: one in the Atlantic and two in the northern Gulf. Divergence in neutral loci indicated gradual genetic change and followed a linear pattern of isolation by distance. Divergence in outlier loci was at least an order of magnitude greater than divergence in neutral loci, and divergence between the regions in the Gulf was twice that of divergence between other regions. Discordance in patterns of genetic divergence between outlier and neutral loci is consistent with the hypothesis that the former reflects adaptive responses to environmental factors that vary on regional scales, while the latter largely reflects drift processes. Differences in basic habitat, initiated by glacial retreat and perpetuated by contemporary oceanic and atmospheric forces interacting with the geomorphology of the northern Gulf, followed by selection, appear to have led to reduced gene flow among red drum across the northern Gulf, reinforcing differences accrued during isolation and resulting in continued divergence across the genome. This same dynamic also may pertain to other coastal or nearshore fishes (18 species in 14 families) where genetically or morphologically defined sister taxa occur in the three regions. Article in Journal/Newspaper Red drum Sciaenops ocellatus Wiley Online Library Ecology and Evolution 9 6 3141 3152 |
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English |
description |
Abstract Restriction site‐associated DNA (RAD) sequencing was used to characterize neutral and adaptive genetic variation among geographic samples of red drum, Sciaenops ocellatus , an estuarine‐dependent fish found in coastal waters along the southeastern coast of the United States (Atlantic) and the northern Gulf of Mexico (Gulf). Analyses of neutral and outlier loci revealed three genetically distinct regional clusters: one in the Atlantic and two in the northern Gulf. Divergence in neutral loci indicated gradual genetic change and followed a linear pattern of isolation by distance. Divergence in outlier loci was at least an order of magnitude greater than divergence in neutral loci, and divergence between the regions in the Gulf was twice that of divergence between other regions. Discordance in patterns of genetic divergence between outlier and neutral loci is consistent with the hypothesis that the former reflects adaptive responses to environmental factors that vary on regional scales, while the latter largely reflects drift processes. Differences in basic habitat, initiated by glacial retreat and perpetuated by contemporary oceanic and atmospheric forces interacting with the geomorphology of the northern Gulf, followed by selection, appear to have led to reduced gene flow among red drum across the northern Gulf, reinforcing differences accrued during isolation and resulting in continued divergence across the genome. This same dynamic also may pertain to other coastal or nearshore fishes (18 species in 14 families) where genetically or morphologically defined sister taxa occur in the three regions. |
author2 |
Texas Sea Grant, Texas A and M University National Oceanic and Atmospheric Administration |
format |
Article in Journal/Newspaper |
author |
Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. |
spellingShingle |
Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. Evolution of population structure in an estuarine‐dependent marine fish |
author_facet |
Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. |
author_sort |
Hollenbeck, Christopher M. |
title |
Evolution of population structure in an estuarine‐dependent marine fish |
title_short |
Evolution of population structure in an estuarine‐dependent marine fish |
title_full |
Evolution of population structure in an estuarine‐dependent marine fish |
title_fullStr |
Evolution of population structure in an estuarine‐dependent marine fish |
title_full_unstemmed |
Evolution of population structure in an estuarine‐dependent marine fish |
title_sort |
evolution of population structure in an estuarine‐dependent marine fish |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/ece3.4936 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.4936 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.4936 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.4936 |
genre |
Red drum Sciaenops ocellatus |
genre_facet |
Red drum Sciaenops ocellatus |
op_source |
Ecology and Evolution volume 9, issue 6, page 3141-3152 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.4936 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
6 |
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3141 |
op_container_end_page |
3152 |
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1811644238618689536 |