Fig. 5From: Natural and experimental evolution of sexual conflict within Caenorhabditis nematodesEffects of 60 generations of experimental evolution in C. elegans under high-competition (outcrossing) and no-competition (self-reproduction) conditions on sperm size. Increased male-male completion leads to a rapid increase in male sperm size, although this effect rapidly asymptotes and the size of these sperm is still much smaller than that observed in C. remanei. Error bars represent on SEMBack to article page