Table 1.

Summary of the different components of annual male reproductive success and their effects on the annual number of genetic fledglings sired by males in the study population

Component	Average (SD)	Range	Effect (SE)	χ 2a	% Total variance
Nr. of social fledglings (with only or primary female)	9.10 (2.50)	2–14	0.88 (0.01)	4,247	26.9
Prop. of within-pair paternity (with only or primary female)	0.89 (0.19)	0–1	8.15 (0.18)	2,087	13.8
Nr. of extra-pair fledglings	0.75 (1.67)	0–9	0.98 (0.02)	2,348	15.4
Nr. of secondary fledglings	0.74 (2.31)	0–11	1.00 (0.01)	4,838	30.5

Test statistics were calculated when entered simultaneously in the model, but see ‘Methods’ for the calculation of percentage of explained total variance

^aall df = 1, all p < 0.001