The effects of temperature and exercise training on swimming performance in juvenile qingbo (Spinibarbus sinensis)

To investigate the effects of temperature and exercise training on swimming performance in juvenile qingbo ( Spinibarbus sinensis ), we measured the following: (1) the resting oxygen consumption rate , critical swimming speed ( U crit ) and active oxygen consumption rate of fish at acclimation temperatures of 10, 15, 20, 25 and 30 °C and (2) the , U crit and of both exercise-trained (exhaustive chasing training for 14 days) and control fish at both low and high acclimation temperatures (15 and 25 °C). The relationship between U crit and temperature ( T ) approximately followed a bell-shaped curve as temperature increased: U crit = 8.21/{1 + [( T − 27.2)/17.0] 2 } ( R 2 = 0.915, P