Fig. 7

Evolution of male–female interactions under 60 generations of experimental evolution in C. elegans under high and no male-competition conditions. (a) Percentage of tester hermaphrodites who failed to survive a five-day period with focal males. Two of three high-competition lines showed significantly increased mortality. (b) Time spent during spicule insertion during successful matings for the high- and no-competition males. Error bars are one SEM