Weak range-wide population structure in the blackfin tuna (Thunnus atlanticus) revealed by analysis of genome-wide SNPs

Dimens, Pavel; Reynal, Lionel; Pau, Cedric; Arocha, Freddy; Hazin, Fabio; Roque, Pollyana; Cummings, Nancie J; Franks, James S; Jones, Kenneth L; Saillant, Eric A

doi:10.1093/icesjms/fsad012

i

Weak range-wide population structure in the blackfin tuna (Thunnus atlanticus) revealed by analysis of genome-wide SNPs

2023
By Dimens, Pavel ; Reynal, Lionel ; Pau, Cedric ; ...

Details

Journal Title:

ICES Journal of Marine Science
Personal Author:

Dimens, Pavel ; Reynal, Lionel ; Pau, Cedric ; Arocha, Freddy ; Hazin, Fabio ; Roque, Pollyana ; Cummings, Nancie J ; Franks, James S ; Jones, Kenneth L ; Saillant, Eric A
NOAA Program & Office:

SEFSC (Southeast Fisheries Science Center) ; NMFS (National Marine Fisheries Service)
Description:

Blackfin tuna (Thunnus atlanticus) is a small tuna distributed in the western Atlantic Ocean where it is exploited by growing recreational and commercial regional fisheries. In this work, genome-wide genetic variation was analysed to investigate the occurrence of stock subdivision. A de novo assembly of the blackfin tuna genome was generated using Illumina paired-end sequencing data and applied as a reference for population genomic analysis of specimens from nine localities (average sample size per locality n = 72) spanning most of the blackfin tuna distribution range. A total of 2139 single-nucleotide polymorphisms were discovered and genotyped using the double-digest restriction associated DNA sequencing. Pairwise exact homogeneity tests were significant in 24 out of 36 population pairs and significant spatial autocorrelation of genotypes was observed for specimens collected within 2250 km of each other. However, divergence among locality samples was very low (pairwise FST range 0.0002–0.0025) and significant temporal variations were detected in localities sampled multiple times. Approaches to detect cryptic groups de novo were unsuccessful. Additional sampling is warranted to determine if multiple stocks need to be defined for management and assess temporal and spatial patterns of gene flow connecting them.
Keywords:

Aquatic Science Ecology Ecology, Evolution, Behavior And Systematics Oceanography Ecology, Evolution, Behavior And Systematics Ecology, Evolution, Behavior And Systematics
Source:

ICES Journal of Marine Science, 80(4), 941-952
DOI:

https://doi.org/10.1093/icesjms/fsad012
ISSN:

1054-3139 ; 1095-9289
Format:

PDF
Publisher:

Oxford University Press (OUP)
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Library
Main Document Checksum:

urn:sha-512:9c2685e8a759c61bf539d0d7cfefd65a2a6e3f23552e407352e71b3bd98bfd9dbeb78c67783300a71acd0b2d06cfd06fba5863093f3b0da77b4d0cf024034012
Download URL:

https://repository.library.noaa.gov/view/noaa/62951/noaa_62951_DS1.pdf
File Type:

[PDF - 1.59 MB ]

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