Figure 1.
Test and observation schedule. Dates refer to hatching day of test chicks; (BHD: before hatching day, HD: Hatching day, PHD: post-hatching day).
Table 1.
Parameters and definition of behavioural traits recorded during the scan sampling observation sessions.
Table 2.
Behaviours of young and older females during breeding period.
Figure 2.
Warming and covering posture rates.
Time spent warming (A) and time spent warming in covering posture (B) for the five maternal behaviour observation days (mean ± SE percentage). Mann-Whitney U-test #0.1>p,*: 0.05>p, **: 0.01>p, ***: p<0.001.
Figure 3.
Behaviour expressed by C-Y and C-O in reaction to humans (mean ± S.E. %). Mann-Whitney U-test **: 0.01>p.