Evidence of hybridization between genetically distinct Baltic cod stocks during peak population abundance(s) ...

• Main Author: Weist, Peggy
• Format: Dataset
• Language: unknown
• Published: figshare 2024
• Subjects: Genetics not elsewhere classified; Gadus morhua
• Online Access: https://dx.doi.org/10.6084/m9.figshare.23014556; https://figshare.com/articles/dataset/_strong_Evidence_of_hybridization_between_genetically_distinct_Baltic_cod_stocks_during_peak_population_abundance_s_strong_/23014556

Range expansions can lead to increased contact of divergent populations, thus increasing the potential of hybridization events. Whether viable hybrids are produced will most likely depend on the level of genomic divergence and associated genomic incompatibilities between the different entities as well as environmental conditions. By taking advantage of historical Baltic cod ( Gadus morhua ) otolith samples combined with genotyping and whole genome sequencing, we here investigate the genetic impact of the increased spawning stock biomass of the eastern Baltic cod stock in the mid 1980s. The eastern Baltic cod is genetically highly differentiated from the adjacent western Baltic cod, and locally adapted to the brackish environmental conditions in the deeper Eastern basins of the Baltic Sea unsuitable for its marine counterparts. Our genotyping results show an increased proportion of eastern Baltic cod in western Baltic areas (Mecklenburg Bay and Arkona Basin) – indicative of a range expansion westwards – ...