Differences in Tolerance to Host Cactus Alkaloids in Drosophila koepferae and D. buzzatii
Figure 4
Treatments Coefficients of Variance.
Coefficients of variance (CVs) for a) increasing concentrations of the alkaloid fraction extracted from T. terschekii, b) increasing concentrations of the non-alkaloid fraction extracted from T. terschekii and c) the natural hosts and the novel artificial host for D. buzzatii (grey bars) and D. koepferae (black bars). Confidence intervals were estimated via bootstrap (see text).