Uncovering neutral and adaptive genomic differentiation among European perch with brackish water and freshwater origin in the western Baltic Sea region
Permanent lenke
https://hdl.handle.net/10037/31556Dato
2023-09-13Type
Journal articleTidsskriftartikkel
Peer reviewed
Forfatter
Skovrind, Mikkel; Pacheco, George; Christensen, Emil Aputsiaq Flindt; Gopalakrishnan, Shyam; Fietz, Katharina; Holm-Hansen, Tore Hejl; Vieira, Filipe Garrett; Krag, Marcus Anders; Carl, Henrik; Gilbert, Marcus Thomas Pius; Olsen, Morten Tange; Møller, Peter Daniel RaskSammendrag
Environmental variation across the range of wild species can lead to local adaptations. The Baltic Sea was formed
when the Fenno-Scandian ice sheet retreated around 12 thousand years ago, creating a new brackish water
habitat colonised by both marine and freshwater fish species. The European perch (Perca fluviatilis) is a predatory
freshwater fish with a large geographical distribution across Eurasia, where it inhabits a wide range of environmental niches. In the Baltic Sea region it has even developed a specialised brackish water perch variant that
can tolerate environmental salinity levels, which are lethal to freshwater perch. However, very little is known
about the underlying mechanisms facilitating the colonisation and adaptation of perch to the Baltic Sea. Here, we
use Genotyping-By-Sequencing data from six freshwater and six brackish water localities to disclose the evolutionary relationship between freshwater and brackish water perch. Our results show that the brackish water
perch occurs in multiple distinct genetic clusters. We find that gene flow between brackish water perch with full
access to the sea likely led to lower levels of differentiation and higher diversity than in freshwater perch. Selection analyses suggest that genomic adaptation played a role in the colonisation of the Baltic Sea and that the
top three regions under selection harbour salinity tolerance genes. We complete by discussing the implications of
our findings for management of brackish water perch in the western Baltic sea.
Forlag
ElsevierSitering
Skovrind, Pacheco, Christensen, Gopalakrishnan, Fietz, Holm-Hansen, Vieira, Krag, Carl, Gilbert, Olsen, Møller. Uncovering neutral and adaptive genomic differentiation among European perch with brackish water and freshwater origin in the western Baltic Sea region. Fisheries Research. 2023;268Metadata
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