Frequency distribution of turning angle for different thermal treatments.

Daily thermal variability treatments are: δ0 = 24±0°C, δ4 = 24±4°C and δ8 = 24±8°C. The Hartigan's dip statistical test revealed a significant bimodality pattern among all treatments. Namely, δ0: D = 0.0214, P<0.05; δ4: D = 0.0345, P<0.05 and δ8: D = 0.0396, P<0.05.