Our second (fig A) testing CTmax at a wider range of oxygen levels showed significant effect of hyperoxia on CTmax of cold-acclimated fish, yet a third experiment (fig B) with larger sample size showed no effect. Our study shows that internal replication is vital as false significance may disappear.

Hyperoxia expands AS but offers no benefit during extreme acute warming. Only extreme hypoxia (30% air sat) reduces their warming tolerance.

Happy to share my first thesis chapter from my PhD at NTNU, published in Journal of Thermal Bio! “No Oxygen limitation of Upper Thermal Tolerance in Zebrafish Regardless of Acclimation Temperature” 🔓🐟🌡️

@jutfelt.bsky.social @annahandreassen.bsky.social @rasmusern.bsky.social