Fig. 1.
(a) Clutch sizes of first (manipulated) and second (unmanipulated) broods of control and experimental females within breeding seasons. (b) The number of offspring successfully fledged by control and experimental females in first and second broods. (c) Body mass of nestlings produced by control and experimental females prior to fledging from first and second broods within seasons. (d) Nestling body mass prior to fledging (brood means) in relation to brood size four days after hatching began in their nest.