Fig. 3.

Influence of mating plugs on the number of sperm from competing males reaching the uterus. (A) When two males mated with the same female, the relative proportion of their sperm reaching the uterus differed according to whether or not the first male’s mating plug was retained. For statistical analysis, see Table 1. (B) When two males mated with the same female, fewer of the second male’s sperm reached the uterus when the first male to mate had larger seminal vesicles. Different colored points are used to distinguish 12 males that mated first in 19 double copulations, each with different competitors. Larger points indicate where the plug recovered after the double copulation consisted of proteins derived from both males. For statistical analysis, see A in Table 3.