Figure 3:

Absence of chorus impairs wood frog mobility. Survivorship curves representing failure of female wood frogs to leave the experimental arena when receiving chorus (dotted line), chorus + low traffic noise (short-dashed line), chorus + high traffic noise (dashed and dotted line), silence (long-dashed line), and high traffic noise (continuous line) acoustic treatments (n = 11, 11, 11, 11 and 10, respectively). Plus (+) symbols at the ends of the curves indicate treatment groups in which not all individuals left the arena within the trial period.