Table 1.

The effect of male residency (M_RS; resident or bachelor), singing context (M_SC; spontaneous or induced) and song progression (proportion of song duration; M_SP) on peak amplitude per bout, peak frequency per bout, and fundamental frequency per bout in the wail and chuck elements of hyrax male songs.

Term	Estimate	Wald χ2	P	Term	Estimate	Wald χ2	P
Wail				Chuck
Peak amplitude
MRS	0.13	0.4	0.531	MRS	0.13	0.4	0.545
MSC	−0.05	0.1	0.770	MSC	−0.23	2.2	0.139
MSP	0.88	11.4	0.001	MSP	0.54	8.6	0.003
MRS * MSP	−0.27	0.4	0.524	MRS * MSP	−0.23	0.3	0.560
MSC * MSP	0.12	0.1	0.716	MSC * MSP	0.42	2.1	0.151
Peak frequency
MRS	−0.08	0.3	0.586	MRS	−0.07	0.1	0.732
MSC	0.15	4.1	0.044	MSC	0.32	5.2	0.022
MSP	1.67	99.1	<0.001	MSP	1.61	56.7	<0.001
MRS * MSP	0.14	0.2	0.664	MRS * MSP	0.16	0.2	0.681
MSC * MSP	−0.27	3.1	0.079	MSC * MSP	−0.60	5.6	0.018
Fundamental frequency
MRS	0.16	1.0	0.316	MRS	−0.02	0.0	0.932
MSC	0.22	2.5	0.112	MSC	0.05	0.1	0.762
MSP	1.32	40.5	<0.001	MSP	0.89	35.7	<0.001
MRS * MSP	−0.33	1.0	0.310	MRS * MSP	0.04	0.0	0.891
MSC * MSP	−0.42	2.2	0.139	MSC * MSP	−0.10	0.1	0.734

df = 1 in all effect tests.