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Abstract
Moderate exercise in the form of sustained swimming (SS) was explored as a conditioner against hauling stress in Brycon amazonicus. Fish were split into two groups and were held for an experimental period in triplicated cylindrical tanks, half of which contained still water and the other half of which contained water moving in a circular motion at 1 body length per second (1BL/sec). After 60 days, both groups were submitted to hauling for 4 h followed by a 48-h recovery period, and analyzed for physiological indicators of stress. Most blood parameters were not notably influenced by exercise, but fish reared under SS returned to normal glucose and cortisol profiles faster than those reared in motionless water.