The maximum food consumption, maximum daily ration level, specific growth rate, assimilation efficiency, passage time and growth efficiency of juvenile soft shelled turtle ( Trionyx sinensis ) were measured in different photoperiod.The experimental light intensity was 5001x and water temperature was 29±1℃. Results showed that photoperiod did not affect on the indices mentioned above significantly.With increasing of body weight, the maximum food consumption gradually increased while the max...