Climate warming will test the limits of thermal plasticity in rainbow trout, a globally distributed fish.

ABSTRACT: Phenotypic plasticity is thought to be critical in allowing organisms to cope with environmental change, but the factors that limit this plasticity are poorly understood, which hampers predictions of species resilience to anthropogenic climate change. Here, we ask if limited plasticity in key traits constrains performance at high temperatures, using two California hatchery strains of rainbow trout (Oncorhynchus mykiss). Aerobic and anaerobic metabolic performance declined at a high but ecologically relevant acclimation temperature (24°C), suggesting performance cannot be maintained at this temperature, despite acclimation. Similarly, while both whole-organism thermal tolerance and hypoxia tolerance improved with acclimation to moderately elevated temperatures, compensation was limit

SUBMITTER: Strowbridge N 

PROVIDER: S-EPMC12257943 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature