Fig. 5

Relationship between the fraction of time acoustic-tagged common carp were in the exploratory state and the time for the carp to exit the lock during three experimental treatments, including CO₂ with forced water circulation (CO₂ + FC), null, and forced water circulation only (FC). The dashed line designates the point when carp spent 50% or more of their time in the exploratory state. Carp that did not exit the lock by the end of the trail were assigned an exit time of 90 min