Relationship between tadpole age and mass at Gosner stage 42 under the two drying treatments.

Regression statistics are (y = 0.010x+0.23, P = 0.016, r² = 0.19) for the constant water level treatment (open circles, solid line); and (y = 0.001x+0.33, P = 0.73, r² = 0.003) for the decreasing water level treatment (crosses, dashed line).