Figure 1.
The seminal fluid (white) discharges only after all sperm (grey) have left the spermatophore.
Figure 2.
Frequency distribution of sperm viability for the males used in this study.
The data are for sperm mixed with the male's own seminal fluid.
Figure 3.
Relationship between viability of sperm in own versus rival seminal fluid.
Closed (open) symbols show the effects of the seminal fluid from males of a pair with relatively high (low) sperm viability on their lower (higher) viability rival.