Distribution of egg hatch rates for individual GUA females recollected from experimental cages containing a 5:1 ratio of sterile (HC, IHC and IGUA males) to fertile GUA males or from control cages containing only sterile or fertile males in the large cages.

The black solid line represents the lower SE of the mean egg hatch rate of either the fertile cages or higher SE of the mean in sterile cages. These limits were used to assign egg batches from competitiveness treatments to either sterile or fertile mating events. Egg batches of an individual female with a hatch rate between the lower SE of the fertile cages and the higher SE of the sterile cages were defined as being intermediate—from an indeterminate mating event.