Table 7.

Phylogenetic correlations between signal parameters

Correlation coefficient
Signal parameter relationshipML αα=(estimated)*TIPS α=15.5FIC α=0
EODf and waveform complexity (F2–F1) 0.26 (15.5) 0.26 –0.19 
EODf and waveform complexity (F3–F1) 0.18 (15.5) 0.19 –0.33 
–FM slope and undershoot FM 0.48†(15.5) 0.49‡ 0.22 
EODf and chirp FM –0.19 (12.2) –0.20 0.10 
Chirp %AM and chirp FM 0.89‡(14.4) 0.89‡ 0.70‡ 
Chirp %AM and chirp positive peak frequency 0.24 (10.9) 0.26 0.17 
Correlation coefficient
Signal parameter relationshipML αα=(estimated)*TIPS α=15.5FIC α=0
EODf and waveform complexity (F2–F1) 0.26 (15.5) 0.26 –0.19 
EODf and waveform complexity (F3–F1) 0.18 (15.5) 0.19 –0.33 
–FM slope and undershoot FM 0.48†(15.5) 0.49‡ 0.22 
EODf and chirp FM –0.19 (12.2) –0.20 0.10 
Chirp %AM and chirp FM 0.89‡(14.4) 0.89‡ 0.70‡ 
Chirp %AM and chirp positive peak frequency 0.24 (10.9) 0.26 0.17 
*

Average of the two αs estimated from the two alternative phylogenies

†

P=0.0506

‡

statistically significant correlation, P<0.05

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