Figure 4From: Identification of morphological and chemical markers of dry- and wet-season conditions in female Anopheles gambiae mosquitoesEffect of photoperiod and emergence day on An. gambiae spiracular index, with 95% confidence intervals. Different letters indicate significant (p < 0.05) pairwise differences between the four treatment by development time groups, as determined by post-hoc Tukey HSD comparisons.Back to article page