Parallel evolution and adaptation to environmental factors in a marine flatfish: Implications for fisheries and aquaculture management of the turbot (Scophthalmus maximus )

Evolutionary Applications
Fernanda Dotti do PradoPaulino Martínez

Abstract

Unraveling adaptive genetic variation represents, in addition to the estimate of population demographic parameters, a cornerstone for the management of aquatic natural living resources, which, in turn, represent the raw material for breeding programs. The turbot (Scophthalmus maximus) is a marine flatfish of high commercial value living on the European continental shelf. While wild populations are declining, aquaculture is flourishing in southern Europe. We evaluated the genetic structure of turbot throughout its natural distribution range (672 individuals; 20 populations) by analyzing allele frequency data from 755 single nucleotide polymorphism discovered and genotyped by double-digest RAD sequencing. The species was structured into four main regions: Baltic Sea, Atlantic Ocean, Adriatic Sea, and Black Sea, with subtle differentiation apparent at the distribution margins of the Atlantic region. Genetic diversity and effective population size estimates were highest in the Atlantic populations, the area of greatest occurrence, while turbot from other regions showed lower levels, reflecting geographical isolation and reduced abundance. Divergent selection was detected within and between the Atlantic Ocean and Baltic Sea regions,...Continue Reading

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Citations

Mar 2, 2019·Science Advances·U Rashid SumailaSumeet S Gulati
Aug 9, 2020·Journal of Fish Biology·Sirin FiridinIlhan Aydin
Sep 11, 2020·Evolutionary Applications·María QuintelaKevin A Glover
Mar 5, 2019·Evolutionary Applications·Simon BernatchezMartin A Mallet
Mar 6, 2021·Evolutionary Applications·Sara VandammeFilip A M Volckaert

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Methods Mentioned

BETA
PCR
genotyping
chips

Software Mentioned

LOSITAN
Google Earth
BLASTn
STACKs
R
ADEGENET
NeESTIMATOR
STRUCTURE HARVESTER
Fios Genomics
ARLEQUIN

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