Fig. 2From: Sex-specific patterns of senescence in artificial insect populations varying in sex-ratio to manipulate reproductive effortAge-specific fertility of females (a) and males (b) according to sex-ratio condition. a the tested females were those coming from the experimental tanks. b the tested females were virgin females mated with males coming from the experimental tanks. Dots are the means (for variation around the means see Additional file 1: Figure S2) and lines are the predictions of the modelsBack to article page