Counter-gradient variation in gene expression between fish populations facilitates colonization of low-dissolved oxygen environments.

Abstract excerpt

The role of phenotypic plasticity during colonization remains unclear due to the shifting importance of plasticity across timescales. In the early stages of colonization, plasticity can facilitate persistence in a novel environment; but over evolutionary time, processes such as genetic assimilation may reduce variation in plastic traits such that species with a longer evolutionary history in an environment can...

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