Fig 1. Competitive fertilization success of the second male to mate with females injected with extracts of male reproductive tracts.

The figure shows the mean (± SE) degree of second male sperm precedence when females remated to a fertile focal male 1 or 2 days after first mating with a sterilized male. Females (N = 29–42 per day and treatment group) were injected with an aqueous solution of an extract of accessory glands (AG), testes, seminal vesicle and ejaculatory duct (others) or with Milli-Q water only as a control. Identical letters indicate no significant difference by sequential Bonferroni post-hoc tests [48] at α = 0.05.