Figure 4.

Life-history traits of long-lived mutant and wild-type hermaphrodites. (a) Worm size is the area of worms measured from an video image of a worm. (b) First reproduction is the time taken for an egg to hatch and develop into an egg-laying adult. (c) Lay rate is the rate of egg laying for young adult worms. (d) Progeny number is the total number of offspring. The large reduction in age-1 fertility is probably caused by the fer-15 mutation, which is also present in this strain. All traits were assayed at 20°C. Means (± SEM) for 15 individuals per strain are plotted.