Higher temperatures distinctly affect the brain mitochondrial respiration of two Amazonian fishes, a predator and a prey

Leak exhibited a decrease in P. nattereri, whereas RCR demonstrated an increase in both species. ROS production displayed a decrease in P. nattereri but remained stable in S. fasciatus. The findings suggest that both fish species possess the capacity to adapt their brain mitochondrial function to higher temperatures, albeit with species-specific responses. These adaptations assist in maintaining brain energy production and minimizing oxidative stress, and emphasize potential imbalances in predator-prey relationships under changing environmental conditions.