Reduced physiological plasticity in a fish adapted to stable temperatures

• DOI: 10.1073/pnas.2201919119
• Publication Date: 2022-05-26T18:04:11Z
• Authors: Rachael Morgan; Anna H. Andreassen; Eirik R. Åsheim; Mette H. Finnøen; Gunnar Dresler; Tore Brembu; Adrian Loh; Joanna J. Miest; Fredrik Jutfelt
• Keywords: Diel vertical migration

Significance Plastic individuals can buffer environmental changes, maintaining a stable performance across gradients. Plasticity is therefore thought to be particularly beneficial for the survival of wild populations that experience large fluctuations, such as diel and seasonal temperature changes. Maintaining plasticity widely assumed costly; however, empirical evidence demonstrating this cost scarce. Here, we predict if costly, it would readily lost in environment, laboratory. To test this, measured diverse range phenotypic traits, spanning gene expression, physiology, behavior, laboratory zebrafish acclimated 15 temperatures. We show fish have many carries cost.