Coexisting good neighbours: acoustic and calling microhabitat niche partitioning in two elusive syntopic species of balloon frogs, Uperodon systoma and U. globulosus (Anura: Microhylidae) and potential of individual vocal signatures

Table 3 Principal components and their values resulting from the PCA computed to segregate acoustic properties between the two species

Principal components	PC1	PC2
Call Rate	−0.34	−0.09
Call Duration	0.40	0.06
Rise Time	0.40	0.06
Fall Time	0.40	0.06
Low Frequency	−0.03	−0.71
High Frequency	−0.39	−0.04
Delta Power	−0.24	−0.03
Frequency Modulation Low Frequency	0.22	−0.37
Frequency Modulation High Frequency	0.09	−0.58
Dominant Harmonic	−0.38	0.04
Standard Deviation	2.44	1.28
Percentage of Variance	59.35	16.27
Eigenvalues	5.94	1.63
ANOVA
p	0.001	0.367
Df	1	1
F_{df1, df2}	11,414	0.816

In bold are variables retained as loading into one of the PCs, and significant p-values from the statistical analysis to test for differences between species. The PCA is based on 257 calls of U. systoma (n = 13) and 111 calls of U. globulosus (n = 7)

ISSN: 2056-3132