L. J. Chapman

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

This study compares gene expression plasticity and evolution between two fish species in low- and high-dissolved oxygen environments, finding counter-gradient variation and higher plasticity in the recently colonized species.

The weakly electric fish, Apteronotus albifrons, avoids hypoxia before it reaches critical levels

The study shows that Apteronotus albifrons avoids hypoxia below 22% air saturation, with increased swimming activity but no change in electric organ discharge frequency.