Figures & data
Table I. Rank of song rate used to score singing activity of Italian agile frog brums.
Figure 1. Calling activity of Rana latastei and Rana dalmatina recorded from 23 February and 6 April. Solid and dotted lines represent bottom and surface temperature, while the bold straight segments report the presence of ice on the pond surface.
Figure 2. Simple, diurnal (lag = 24) and first differencing autocorrelation function (ACF) for the calling activity of Rana latastei and Rana dalmatina; the dashed lines marks significant correlations.
Figure 3. Daily trend in calling activity of Rana latastei and Rana dalmatina: a, mew call; b, brum call of Rana latastei; c and d, advertisement call of Rana dalmatina using first and second harmonic frequency models, respectively. The dashed lines represent 95% confidence intervals.
Table II. Ranking of candidate models for the daily trend in singing activity of the vocalisation of common and Italian agile frogs according to the corrected Akaike’s Information criterion (AICc) model selection. K represents the number of parameters, and models are listed in order of best AICc. Delta_AICc is the difference with respect to the best model, AICcWt is the AICc weight, Cum.Wt is the cumulative weight, LogLik is the log likehood of the model.
Figure 4. Seasonal trend in calling activity of Rana latastei and Rana dalmatina in relation to the number of egg masses laid (histograms); solid lines represent the trend predicted by the best model and dotted lines represent the confidence and prediction intervals for the fitted model.
Table III. Ranking of candidate models for the seasonal trend in singing activity of the vocalisation of common and Italian agile frogs according to the AICc model selection. K represents the numberof parameters and models are listed in order of best AICc.