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Article

Migratory jackpot individuals fuel rapid ecotype shifts in Galaxias fishes.

Nature communications - 23 Jun 2026

Iwikau Ashleigh, Augspurger Jason, Bailie Marc A, McCulloch Graham A, Darestani Mitra M, King Tania M, Closs Gerard P, Ingram Travis, Lokman P Mark, Deagle Bruce, Burridge Christopher P, Dutoit Ludovic, Waters Jonathan M

Abstract excerpt

Adaptation is considered essential for species facing environmental change, but our understanding of the evolution of complex ecotypes remains limited. We show that a substantial genomic cluster of co-adapted alleles has repeatedly fuelled complex life-history shifts in fishes. Specifically, the majority of strong outlier loci underpinning repeated landlocking of formerly marine-migratory Galaxias lineages are...

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PMID: 42336867
DOI: 10.1038/s41467-026-74946-5
PMCID: PMC13443097

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