ArticlePloS one2019
Assessing SNP-markers to study population mixing and ecological adaptation in Baltic cod.
Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 28 citations in OpenAlex.
- Spatial Change of Dominant Baltic Sea Demersal Fish Across Two Decades.Ecology and evolution · 2025Article
- Article
- Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s).Evolutionary applications · 2023Article
- Living apart together: Long-term coexistence of Baltic cod stocks associated with depth-specific habitat use.PloS one · 2022Article
- Tipping point realized in cod fishery.Scientific reports · 2021Article
- A star is torn-molecular analysis divides the Mediterranean population of Poli's stellate barnacle,PeerJ · 2021Article
- The effect of growth rate on otolith-based discrimination of cod (Gadus morhua) ecotypes.PloS one · 2021Article
- Identification of Arctic Food Fish Species for Anthropogenic Contaminant Testing Using Geography and Genetics.Foods (Basel, Switzerland) · 2020Article
- Genetic analysis redraws the management boundaries for the European sprat.Evolutionary applications · 2020Article
- SNP genotyping reveals substructuring in weakly differentiated populations of Atlantic cod (Gadus morhua) from diverse environments in the Baltic Sea.Scientific reports · 2020Article
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Authors and funding
11 authors at 4 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Atlantic cod (Gadus morhua) is a species of great ecological and economical importance in the Baltic Sea. Here, two genetically differentiated stocks, the western and the eastern Baltic cod, display substantial mechanical mixing, hampering our understanding of cod ecology and impeding stock assessments and management. Based on whole-genome re-sequencing data from reference samples obtained from the study area, we designed two different panels of Single Nucleotide Polymorphisms markers (SNPs), which take into account the exceptional genome architecture of cod. A minimum panel of 20 diagnostic SNPs and an extended panel (20 diagnostic and 18 biologically informative SNPs, 38 in total) were developed and validated to distinguish unambiguously between the western and the eastern Baltic cod stocks and to enable studies of local adaptation to the specific environment in the Baltic Sea, respectively. We tested both panels on cod sampled from the southern Baltic Sea (n = 603) caught in 2015 and 2016. Genotyping results showed that catches from the mixing zone in the Arkona Sea, were composed of similar proportions of individuals of the western and the eastern stock. Catches from adjacent areas to the east, the Bornholm Basin and Gdańsk Deep, were exclusively composed of eastern Baltic cod, whereas catches from adjacent western areas (Belt Sea and Öresund) were composed of western Baltic cod. Interestingly, the two Baltic cod stocks showed strong genetic differences at loci associated with life-history trait candidate genes, highlighting the species' potential for ecological adaptation even at small geographical scales. The minimum and the extended panel of SNP markers presented in this study provide powerful tools for future applications in research and fisheries management to further illuminate the mixing dynamics of cod in the Baltic Sea and to better understand Baltic cod ecology.
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