Fig 1.
Blackcap male (▼) and female (●) parental investment during 1 hour observation, n = 50 nests.
A–activity rate/h, B–activity duration/h. Bars show ± 1SE.
Table 1.
Blackcap male and female participation in parental care.
Fig 2.
Relation between mean nestling mass in a brood prior to fledging, at eight days old, and the parental parity in feeding (PCf).
The more equal division of work between parents the closer the value of PCf to 1. N = 20 nests.
Table 2.
GLM on factors affecting nestling development and the estimate values of parameters.
Fig 3.
Relation between nestling mass and survival of nestlings forced to fledge at nine days of age because of a predator attack.
N = 14 nests.