This file includes fecundity variation of all the females from which 20 high-fecundity and low-fecundity duos were selected (Table S3). The linear mixed models describe variation in female fecundity (i.e. the number of eggs laid per 7-week breeding round; i.e. ‘eggs’; this is ‘estimated fecundity’ before genetic parentage assignment because females were chosen based on that) as a function of female identity (FID), breeding round (first vs. second 7-week period), the number of days females were socially paired (‘dayspaired’), and the exclusiveness of the pair bond (‘Fshare’, with high values reflecting exclusive pairing). The column labelled ‘F’ refers to the inbreeding coefficient of each female
