Table 1.
Begging call measurements of nestling cuckoos in the (a) cross-fostering experiment and of (b) naturally raised cuckoos from two host-races. (In (a), different superscripts within a column indicate significant differences (post hoc least significant difference, p<0.05, after ANOVA comparing the three hosts). In (b), significant differences between the two host-races indicated between the rows (*0.05>p>0.01, two-tailed t-tests) and significant differences from same raising host in (a) indicated next to measurement (*0.05>p>0.01, two-tailed t-tests).)
| cuckoo host-race | raising host species (n) | syllable duration (s) | begging call measurements (mean±1 s.d.) frequency (kHz) | |||
|---|---|---|---|---|---|---|
| peak | minimum | maximum | bandwidth | |||
| (a) cross-fostering experiment | ||||||
| reed warbler-cuckoo | reed warbler (9) | 0.038±0.012a | 7.0±0.9a | 5.1±1.0a | 8.9±1.0a | 3.9±1.3a |
| robin (3) | 0.050±0.017ab | 7.5±0.2a | 6.3±0.3b | 8.9±0.4a | 2.5±0.7ab | |
| dunnock (5) | 0.080±0.031b | 7.5±0.6a | 6.5±0.5b | 8.6±0.4a | 2.1±0.5b | |
| (b) naturally raised cuckoos | ||||||
| reed warbler-cuckoo | reed warbler (14) | 0.040±0.024 | 7.51±0.4 | 6.2±0.6* | 8.8±0.6 | 2.6±0.9* |
| * | * | * | ||||
| dunnock-cuckoo | dunnock (9) | 0.065±0.027 | 7.1±0.6 | 6.1±1.0 | 8.0±0.6 | 1.9±1.0 |