A century of anthropogenic perturbations impact genomic signatures of the iconic migratory Atlantic cod

作者：Cecilia Helmerson, Joël M. Durant, Siv Nam Khang Hoff, Marine Servane Ono Brieuc, Paul R. Berg, Per Erik Jorde, Marius F. Maurstad, Ian Bradbury, Olav Sigurd Kjesbu, Jane Aanestad Godiksen, Nils Chr. Stenseth, Bastiaan Star, Kjetill S. Jakobsen, Sissel Jentoft · 发表于：Science Advances · 年份：2025 · DOI：10.1126/sciadv.adp3342 · 被引用次数：2 · 研究领域：Marine animal studies overview、Fish Ecology and Management Studies、Genetic diversity and population structure

Anthropogenic stressors have led to marked ecosystem perturbations, including population declines and shifts in habitat range for key marine fish species. Understanding how these changes affect genome-wide characteristics, causing long-term evolutionary responses, is still in its infancy. Genome-wide retrospective assessment of the iconic migratory Atlantic cod ( Gadus morhua ) from the Barents Sea, unraveled varying degree of admixture with the nonmigratory coastal ecotype throughout the 20th century, and intriguingly more intensified during recent decades. These genomic changes were supported by an increased number of individuals displaying the heterozygous state of the chromosomal inversion coupled to migratory behavior in Atlantic cod. Ecological models and genome-wide scans identified that some of the observed frequency shifts, coupled to neural development, metabolic, and growth regulation, covaried with intensified fisheries, reduced generation time, and ocean warming. Our results demonstrate how anthropogenic perturbations impact the dynamics between two well-known ecotypes of Atlantic cod and thus, their genomic signatures, with potential implications for future management programs.