(A) Mean number of eggs over 5 d laid by infected (black bars) and uninfected (white bars) lines collected at Riverside in 2002 and 1988. The 2002 lines were assayed four generations after collection. A significant overall increase in fecundity was associated with the infection (F 1,108 = 6.7, p = 0.011).
(B) Mean number of eggs over 5 d laid by infected (black) and uninfected (white) lines collected at Riverside in 2002 and assayed 10 mo after collection. These flies were cultured on a yeast-restricted diet. Again, the infection produced a significant overall increase in fecundity (F 1,213 = 5.8, p = 0.017).
(C) Mean number of eggs over 10 d laid by infected (black) and uninfected (white) lines collected at Irvine in 2004 and assayed five generations after collection. Infection status had a significant effect on fecundity (F 1,185 = 8.03, p = 0.005).
Error bars are standard errors, and asterisks indicate significant differences at the 5% level.