Table 2. Mean values (±SEM) for all acoustic variables. Kruskal Wallis results for differences between groups.
| Acoustic Feature | JAP | H1 | H2 | F2 | BC1 | BC2 | EUR1 | EUR2 | Chi2 | P |
| S1 (ms) | 63±18 | 193±17 | 161±8 | 119±1 | 195±40 | 224±36 | 383±24 | 49±38 | 54.1 | *** |
| (b) | (c) | (b,c,d) | (b,d,e) | (a,b,c,d,e,f) | (a,b,c,d,e,f) | (a) | ||||
| S2 (ms) | 59±15 | 182±9 | 168±11 | 175±11 | 182±3 | 173±5 | - | 172±17 | 51.5 | *** |
| (a) | (b,e,f) | (b,c,e) | (c,d,e,f) | (a,b,c,d,e) | (a,b,c,d,e) | - | (e) | |||
| S3 (ms) | 328±20 | 182±8 | 180±21 | 204±8 | - | 161 | - | - | 74.8 | *** |
| - | (b) | (b,c) | (b,c,d) | - | - | - | - | |||
| TD (ms) | 626±14 | 503±15 | 507±12 | 503±22 | 414±17 | 417±20 | 383±24 | 407±10 | 62.3 | *** |
| (c) | (d) | (d) | (d) | (a,b,c,e) | (a,b,c,e) | (a) | (a,b) | |||
| T12 (ms) | 163±16 | 191±9 | 177±10 | 151±16 | 211±5 | 204±6 | 203±15 | 242±17 | 47.1 | *** |
| (b) | (a,b,c) | (b,c) | (b) | (a,b,c,d) | (a,b,c,d) | (a) | ||||
| T23 (ms) | 171±13 | 166±11 | 175±8 | 151±16 | 127±3 | 133±4 | 138±22 | 122±6 | 102.1 | *** |
| (c) | (a,d) | (a,c,d,e) | (a,d,e,f) | (a,b,c,g) | (a,b,c,d,f,g) | (a) | (a,b) | |||
| Mean mean frequency (Hz) | 2598±57 | 2361±44 | 2608±33 | 2310±64 | 2164±69 | 2118±73 | 1731±30 | 2525±85 | 73.5 | *** |
| (b,c) | (b,d) | (c) | (b,d,e) | (a,c,d,e,f) | (a,c,e,f) | (a) | (b) | |||
| Mean_entropy (deg) | −2.6±0.1 | −2.9±0.1 | −3±0.1 | −3.7±0.1 | −3.6±0.1 | −3.8±0.1 | −3.9±0.2 | −3.2±0.2 | 82.1 | *** |
| (c) | (b,c,d) | (d) | (b,e) | (a,b,c,e) | (a,b,c,e) | (a) | (b) | |||
| Mean FM (deg) | 45.8±0.6 | 42.3±0.8 | 46.5±1 | 45.1±1.3 | 47.8±2 | 44.8±2.3 | 31.8±1.4 | 52±1.3 | 63.7 | *** |
| (c) | (d) | (c,e) | (c,d,e,f) | (a,b,c,e,f,g) | (a,c,d,e,f,g) | (a,b) | ||||
| Mean AM (×10−4 deg) | 59±7 | 57±7 | 57±5 | 54±7 | 55±8 | 53±9 | 56±12 | 48±6 | 101.5 | *** |
| (b) | (a,b,c) | (a,c) | (a,d) | (a,b,d,e) | (a,b,d,e) | (a) | ||||
| Var. mean frequency (kHz) | 642±37 | 598±42 | 628±45 | 468±58 | 577±67 | 688±51 | 611±35 | 606±53 | 23 | 0.3 NS |
| Variance entropy (deg) | 0.67±0.04 | 0.66±0.04 | 0.76±0.04 | 0.9±0.15 | 0.96±0.08 | 0.98±0.09 | 0.41±0.03 | 1.21±0.07 | 78.4 | *** |
| (b) | (b,c) | (b,c,d) | (b,c,e) | (a,b,e,f) | (a,d,e,f) | (a) | ||||
| Variance FM (deg) | 577±11 | 614±9 | 589±11 | 586±19 | 565±15 | 580±18 | 537±15 | 563±17 | 8.8 | 0.002 |
| (b,c) | (d) | (b,c,d,e) | (a,b,c,d,e) | (a,b,c,e,f,g) | (a,b,c,e,f,g) | (a) | (a,b) | |||
| Variance AM (×10−4 deg) | 55±4 | 46±4 | 53±5 | 56±6 | 68±6 | 53±7 | 62±4 | 52±6 | 8.8 | 0.3 NS |
Means with the same letter are not significantly different, Mann Whitney, p<0.05. S1, S2, S3: duration of Segment 1, 2, 3; TD: Total Duration; T12: time interval between impulsion 1 and impulsion 2; T23: time interval between impulsion 2 and impulsion 3. H1: female japonica × male coturnix; H2: female coturnix × male japonica; F2: female H1× male H1; BC1: female H1× male coturnix; BC2: female coturnix × male H1; EUR1: wawa of the European quail; EUR2: triplet of the European quail; JAP: japonica.