Temporal allele frequency changes in large‐effect loci reveal potential fishing impacts on salmon life‐history diversity

• DOI: 10.1111/eva.13690
• Publication Date: 2024-04-26T05:35:47Z
• Authors: Antti Miettinen; Atso Romakkaniemi; Johan Dannewitz; Tapani Pakarinen; Stefan Palm; Lo Persson; Johan Östergren; Craig R. Primmer; Victoria L. Pritc...
• Keywords: Commercial fishing; Life History Theory

Abstract Fishing has the potential to influence life‐history traits of exploited populations. However, our understanding how fisheries can induce evolutionary genetic changes remains incomplete. The discovery large‐effect loci linked with ecologically important traits, such as age at maturity in Atlantic salmon ( Salmo salar ), provides an opportunity study impacts temporally varying fishing pressures on these traits. A 93‐year archive fish scales from wild catches northern Baltic Sea region allowed us monitor variation adaptive diversity dataset consisted samples both commercial and recreational that target their spawning migration. Using a genotyping‐by‐sequencing approach (GT‐seq), we discovered strong within‐season allele frequency vgll3 locus maturity: early season preferentially targeted variant older maturation. We also found temporal catch proportions different subpopulations. Therefore, selective harvesting may vary depending seasonal timing fishing, which cause key diversity. This knowledge be used guide management reduce effects practices Thus, this tangible example using genomic approaches infer, help mitigate human adaptively nature.