Fig. 3

The relationship between hatching date and fledgling sex ratio (proportion of males). Plots and bars represent mean values and standard errors, which are calculated by dividing the data into 5 rank categories starting from the lowest value of standardized hatching date (first 4 plots, 298 samples; last plot, 299 samples). Parameters were estimated using the generalized linear mixed model shown in Table 2. The line is the predicted value