Figure 1

Distribution of species and molecular forms of Anopheles gambiae complex in the study area. Numbers (and sample sizes) above pie-charts refer to samples, as listed in Table 2. Dashed lines indicate the boundaries of the arbitrarily defined areas and sub-areas (see text for details): Lower River Area, Western (LRA-W); Lower River Area, South Bank (LRA-S); Lower River Area, North Bank (LRA-N); Central River Area (CRA); Upper River Area (URA); Eastern Area (EA). ERS-2005 = late rainy-early dry season 2005 (below); RS-2006 = rainy season 2006 (above).