Figure 3.

Tenure but not individual age of lance-tailed manakins was correlated with siring success in the final year of alpha status. Plots show the relationships of (a) individual alpha age (years after hatching) and (b) year of alpha tenure to ARS, measured as number of chicks sired. Data are 102 observations on 43 alpha individuals for which age was known and the start of alpha tenure was directly observed. Filled circles represent males in their final year of alpha status (n = 30 observations), while open circles represent males that survived to the following age or tenure category (n = 72 observations). Data markers are jittered to visualize overlapping values, with sample sizes provided below the x-axis as the number of individuals that survived (n_s) and the number that disappeared (n_d) in each age or tenure class.