Table 1. Coefficients (mean, standard deviation, and 2.5th and 97.5th percentiles) of the variables included in the regression models of call frequency as a function of traffic noise, expressed as L10 18 hr dB(A) SPL, and temperature expressed as degrees Centigrade. Coefficients are shown for the models of the dominant frequency of the call of Litoria ewingii and the lower frequency of the call of Crinia signifera.

Litoria ewingii Crinia signifera
Variable Mean SD 2.5% 97.5% Mean SD 2.5% 97.5%
Constant 2489 19.1 2452 2527 2835 34.2 2766 2901
Traffic noise 4.15 2.76 -1.24 9.60 1.50 3.68 -5.76 8.77
Temperature 21.5 5.49 10.8 32.4 10.3 8.22 -6.16 26.2