Figure 2.

Reduced production of oxygen free radicals in stored sperm by females of the cricket, Gryllus bimaculatus. Sperm stored by females (open diamonds; all are independent data points) show substantially reduced oxygen radical production compared with freshly ejaculated sperm (black diamonds; male sample mean 100%) and freshly ejaculated sperm kept alive in vitro in saline buffer (grey diamonds). Lines connecting male and female samples denote paired measurements of sperm from the same male, when freshly ejaculated and after being in storage for less than 1 day.