Reproductive success after having applied brood size manipulation experiment in two successive years

Male Ring: Identity of the breeding male; Year X2: second year of brood size manipulation experiment; N_Fledglings X2: number of fledglings in the second year; Hatch date X2: hatching date in the second year (number of days after 1st January); Treatment X1: brood size manipulation in the first year; Treatment X2: brood size manipulation in the second year; Class Treatment: 1 (reduced-reduced), 2 (enlarged-reduced), 3 (reduced-enlarge), 4 (enlarged-enlarged); Father color: color of the father (1 for dark melanic to 5 for light melanic)