Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis)

Amy Healey; Matthew M. Farthing; Francis K. E. Nunoo; Warren M. Potts; Warwick H. H. Sauer; Ilze Skujina; Nathan King; Sophie Marie Catherine de Becquevort; Paul Shaw; Niall McKeown

doi:10.1111/jfb.14276

Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis)

Overview

Standard

Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis). / Healey, Amy; Farthing, Matthew M.; Nunoo, Francis K. E. et al.

In: Journal of Fish Biology, Vol. 96, No. 3, 14276, 09.03.2020, p. 795-805.

Research output: Contribution to journal › Article › peer-review

Harvard

Healey, A, Farthing, MM, Nunoo, FKE, Potts, WM, Sauer, WHH, Skujina, I, King, N, de Becquevort, SMC, Shaw, P & McKeown, N 2020, 'Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis)', Journal of Fish Biology, vol. 96, no. 3, 14276, pp. 795-805. https://doi.org/10.1111/jfb.14276

APA

Healey, A., Farthing, M. M., Nunoo, F. K. E., Potts, W. M., Sauer, W. H. H., Skujina, I., King, N., de Becquevort, S. M. C., Shaw, P., & McKeown, N. (2020). Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis). Journal of Fish Biology, 96(3), 795-805. [14276]. https://doi.org/10.1111/jfb.14276

Vancouver

Healey A, Farthing MM, Nunoo FKE, Potts WM, Sauer WHH, Skujina I et al. Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis). Journal of Fish Biology. 2020 Mar 9;96(3):795-805. 14276. Epub 2020 Feb 20. doi: 10.1111/jfb.14276

Author

Healey, Amy ; Farthing, Matthew M. ; Nunoo, Francis K. E. et al. / Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis). In: Journal of Fish Biology. 2020 ; Vol. 96, No. 3. pp. 795-805.

Bibtex - Download

@article{d00ab64b15994924943422abd82d0485,

title = "Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis)",

abstract = "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 FST 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.",

keywords = "biogeography, fish, genetic, species, stock, taxonomy, Genetics, Population, Demography, Gene Flow, DNA, Mitochondrial/genetics, Perciformes/classification, Africa, Southern, Microsatellite Repeats/genetics, Animals",

author = "Amy Healey and Farthing, {Matthew M.} and Nunoo, {Francis K. E.} and Potts, {Warren M.} and Sauer, {Warwick H. H.} and Ilze Skujina and Nathan King and {de Becquevort}, {Sophie Marie Catherine} and Paul Shaw and Niall McKeown",

note = "Funding Information: This research was funded by an Aberystwyth University PhD scholarship to AJEH. Publisher Copyright: {\textcopyright} 2020 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of The Fisheries Society of the British Isles.",

year = "2020",

month = mar,

day = "9",

doi = "10.1111/jfb.14276",

language = "English",

volume = "96",

pages = "795--805",

journal = "Journal of Fish Biology",

issn = "0022-1112",

publisher = "Wiley",

number = "3",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Genetic analysis provides insights into species distribution and population structure in East Atlantic horse mackerel (Trachurus trachurus and T. capensis)

AU - Healey, Amy

AU - Farthing, Matthew M.

AU - Nunoo, Francis K. E.

AU - Potts, Warren M.

AU - Sauer, Warwick H. H.

AU - Skujina, Ilze

AU - King, Nathan

AU - de Becquevort, Sophie Marie Catherine

AU - Shaw, Paul

AU - McKeown, Niall

N1 - Funding Information: This research was funded by an Aberystwyth University PhD scholarship to AJEH. Publisher Copyright: © 2020 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of The Fisheries Society of the British Isles.

PY - 2020/3/9

Y1 - 2020/3/9

N2 - 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 FST 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.

AB - 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 FST 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.

KW - biogeography

KW - fish

KW - genetic

KW - species

KW - stock

KW - taxonomy

KW - Genetics, Population

KW - Demography

KW - Gene Flow

KW - DNA, Mitochondrial/genetics

KW - Perciformes/classification

KW - Africa, Southern