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Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis)
Two sister species of horse mackerel (Trachurus trachurus and T. capensis) are described that are intensively harvested in East Atlantic waters. To address long‐standing uncertainties as to their respective geographical ranges, overlap and intraspecific population structure this study combined genet...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Blackwell Publishing Ltd
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079130/ https://www.ncbi.nlm.nih.gov/pubmed/32031244 http://dx.doi.org/10.1111/jfb.14276 |
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author | Healey, Amy J. E. Farthing, Matthew W. Nunoo, Francis K. E. Potts, Warren M. Sauer, Warwick H. H. Skujina, Ilze King, Nathan de Becquevort, Sophie Shaw, Paul W. McKeown, Niall J. |
author_facet | Healey, Amy J. E. Farthing, Matthew W. Nunoo, Francis K. E. Potts, Warren M. Sauer, Warwick H. H. Skujina, Ilze King, Nathan de Becquevort, Sophie Shaw, Paul W. McKeown, Niall J. |
author_sort | Healey, Amy J. E. |
collection | PubMed |
description | Two sister species of horse mackerel (Trachurus trachurus and T. capensis) are described that are intensively harvested in East Atlantic waters. To address long‐standing uncertainties as to their respective geographical ranges, overlap and intraspecific population structure this study combined genetic (mitochondrial DNA and microsatellite) analysis and targeted sampling of the hitherto understudied West African coast. mtDNA revealed two reciprocally monophyletic clades corresponding to each species with interspecies nuclear differentiation supported by F (ST) values. The T. trachurus clade was found across the north‐east Atlantic down to Ghana but was absent from Angolan and South African samples. The T. capensis clade was found only in South Africa, Angola and a single Ghanaian individual. This pattern suggests that both species may overlap in the waters around Ghana. The potential for cryptic hybridization and/or indiscriminate harvesting of both species in the region is discussed. For T. capensis mtDNA supports high gene flow across the Benguela upwelling system, which fits with the species' ecology. The data add to evidence of a lack of significant genetic structure throughout the range of T. trachurus though the assumption of demographic panmixia is cautioned against. For both species, resolution of stock recruitment heterogeneity relevant to fishery management, as well as potential hybridization, will require more powerful genomic analyses. |
format | Online Article Text |
id | pubmed-7079130 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Blackwell Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-70791302020-03-19 Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis) Healey, Amy J. E. Farthing, Matthew W. Nunoo, Francis K. E. Potts, Warren M. Sauer, Warwick H. H. Skujina, Ilze King, Nathan de Becquevort, Sophie Shaw, Paul W. McKeown, Niall J. J Fish Biol Regular Papers Two sister species of horse mackerel (Trachurus trachurus and T. capensis) are described that are intensively harvested in East Atlantic waters. To address long‐standing uncertainties as to their respective geographical ranges, overlap and intraspecific population structure this study combined genetic (mitochondrial DNA and microsatellite) analysis and targeted sampling of the hitherto understudied West African coast. mtDNA revealed two reciprocally monophyletic clades corresponding to each species with interspecies nuclear differentiation supported by F (ST) values. The T. trachurus clade was found across the north‐east Atlantic down to Ghana but was absent from Angolan and South African samples. The T. capensis clade was found only in South Africa, Angola and a single Ghanaian individual. This pattern suggests that both species may overlap in the waters around Ghana. The potential for cryptic hybridization and/or indiscriminate harvesting of both species in the region is discussed. For T. capensis mtDNA supports high gene flow across the Benguela upwelling system, which fits with the species' ecology. The data add to evidence of a lack of significant genetic structure throughout the range of T. trachurus though the assumption of demographic panmixia is cautioned against. For both species, resolution of stock recruitment heterogeneity relevant to fishery management, as well as potential hybridization, will require more powerful genomic analyses. Blackwell Publishing Ltd 2020-02-20 2020-03 /pmc/articles/PMC7079130/ /pubmed/32031244 http://dx.doi.org/10.1111/jfb.14276 Text en © 2020 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of The Fisheries Society of the British Isles. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Regular Papers Healey, Amy J. E. Farthing, Matthew W. Nunoo, Francis K. E. Potts, Warren M. Sauer, Warwick H. H. Skujina, Ilze King, Nathan de Becquevort, Sophie Shaw, Paul W. McKeown, Niall J. Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis) |
title | Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis) |
title_full | Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis) |
title_fullStr | Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis) |
title_full_unstemmed | Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis) |
title_short | Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis) |
title_sort | genetic analysis provides insights into species distribution and population structure in east atlantic horse mackerel (trachurus trachurus and t. capensis) |
topic | Regular Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079130/ https://www.ncbi.nlm.nih.gov/pubmed/32031244 http://dx.doi.org/10.1111/jfb.14276 |
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