Widespread aquaculture escapes have led to domestication‐admixture in many wild Atlantic salmon populations, widely regarded as a threat to their evolutionary trajectory and persistence amid historically low population numbers. Although decades of research document reduced fitness of domesticated‐admixed offspring in the wild, productivity measurements of domestication‐admixed or feral salmon populations are lacking. Over a 10...

The architecture underpinning genomic divergence is still a largely uncharted territory and likely case‐dependent. Here, we investigated genome‐wide variation in Ballan wrasse, a northeastern Atlantic fish species that displays two sympatric colour morphs, spotty and plain, that have been suggested to represent subspecies. We produced a chromosome‐level reference genome and thereafter investigated genomic divergence among 152...

In Atlantic salmon, age at maturation is a life history trait governed by a sex‐specific trade‐off between reproductive success and survival. Following environmental changes across large areas of the Northeast Atlantic, many populations currently display smaller size at age and higher age at maturation. However, whether these changes reflect rapid evolution or plasticity is unknown. Approximately 1500 historical and contempora...