Table 1 Opportunity for sexual selection. Standardized variances in mating and reproductive success for male and female H. valerioi, calculated for all individuals and successful reproducers

Number of clutches

I = 0.86

I = 0.32

ΔI _clutches = 0.54

I = 0.28

I = 0.23

ΔI _clutches = 0.04

Number of mates

I = 0.78

I = 0.33

ΔI _mates = 0.45

I = 0.22

I = 0.24

ΔI _mates = −0.02